Re: Re: [PATCH 1/1] [V2] [RISC-V] support cm.push cm.pop cm.popret in zcmp

[Fei Gao]

On 2023-05-30 13:26  Sinan <sinan....@linux.alibaba.com> wrote:
>
>>> +/* Return TRUE if Zcmp push and pop insns should be
>>> + avoided. FALSE otherwise.
>>> + Only use multi push & pop if all GPRs masked can be covered,
>>> + and stack access is SP based,
>>> + and GPRs are at top of the stack frame,
>>> + and no conflicts in stack allocation with other features */
>>> +static bool
>>> +riscv_avoid_multi_push(const struct riscv_frame_info *frame)
>>> +{
>>> + if (!TARGET_ZCMP
>>> + || crtl->calls_eh_return
>>> + || frame_pointer_needed
>>> + || cfun->machine->interrupt_handler_p
>>> + || cfun->machine->varargs_size != 0
>>> + || crtl->args.pretend_args_size != 0
>>> + || (frame->mask & ~ MULTI_PUSH_GPR_MASK))
>>> + return true;
>>> +
>>> + return false;
>>> +}
>Any reason to skip generating push/pop in the cases where a frame pointer is 
>needed?
>IIRC, only code compiled with O1 and above will omit frame pointer, if so then 
>code with
>O0 will never generate cm.push/pop. 
without -fomit-frame-pointer in O0, the stack access is s0 based, while 
cm.push/pop is sp based access.
So cm.push/pop will not be generated. Same logic as taken by save-restore.

>Same question for interrupt_handler_p. I think cm.push/pop can handle this 
>case. e.g.
>the test case zc-zcmp-push-pop-6.c from Jiawei's patch. 
Same logic as taken by save-restore. I don't know the exact reason why 
save-restore cannot be used in interrupt. 
In riscv_compute_frame_info, riscv_stack_align (num_save_restore * 
UNITS_PER_WORD) == x_save_size fails in most cases for interrupt.
          if (riscv_stack_align (num_save_restore * UNITS_PER_WORD) == 
x_save_size
              && !riscv_avoid_save_libcall ())
            {
              ...
              frame->save_libcall_adjustment = x_save_size;
            }
In my understanding, use save-restore if all regs to be saved can be covered. 
That's why i added (frame->mask & ~ MULTI_PUSH_GPR_MASK)
in riscv_avoid_multi_push.

BR, 
Fei

>BR,
>Sinan 

>------------------------------------------------------------------
>Sender:Fei Gao <gao...@eswincomputing.com>
>Sent At:2023 May 16 (Tue.) 17:34
>Recipient:sinan.lin <sinan....@linux.alibaba.com>; jiawei 
><jia...@iscas.ac.cn>; shihua <shi...@iscas.ac.cn>; lidie 
><li...@eswincomputing.com>
>Cc:Fei Gao <gao...@eswincomputing.com>
>Subject:[PATCH 1/1] [V2] [RISC-V] support cm.push cm.pop cm.popret in zcmp
>Zcmp can share the same logic as save-restore in stack allocation: 
>pre-allocation
>by cm.push, step 1 and step 2.
>please be noted cm.push pushes ra, s0-s11 in reverse order than what 
>save-restore does.
>So adaption has been done in .cfi directives in my patch.
>gcc/ChangeLog:
> * config/riscv/predicates.md (slot_0_offset_operand): predicates for slot 0 
> offset.
> (slot_1_offset_operand): likewise
> (slot_2_offset_operand): likewise
> (slot_3_offset_operand): likewise
> (slot_4_offset_operand): likewise
> (slot_5_offset_operand): likewise
> (slot_6_offset_operand): likewise
> (slot_7_offset_operand): likewise
> (slot_8_offset_operand): likewise
> (slot_9_offset_operand): likewise
> (slot_10_offset_operand): likewise
> (slot_11_offset_operand): likewise
> (slot_12_offset_operand): likewise
> (stack_push_up_to_ra_operand): predicates for stack adjust of pushing ra
> (stack_push_up_to_s0_operand): predicates for stack adjust of pushing ra, s0
> (stack_push_up_to_s1_operand): likewise
> (stack_push_up_to_s2_operand): likewise
> (stack_push_up_to_s3_operand): likewise
> (stack_push_up_to_s4_operand): likewise
> (stack_push_up_to_s5_operand): likewise
> (stack_push_up_to_s6_operand): likewise
> (stack_push_up_to_s7_operand): likewise
> (stack_push_up_to_s8_operand): likewise
> (stack_push_up_to_s9_operand): likewise
> (stack_push_up_to_s11_operand): likewise
> (stack_pop_up_to_ra_operand): predicates for stack adjust of poping ra
> (stack_pop_up_to_s0_operand): predicates for stack adjust of poping ra, s0
> (stack_pop_up_to_s1_operand): likewise
> (stack_pop_up_to_s2_operand): likewise
> (stack_pop_up_to_s3_operand): likewise
> (stack_pop_up_to_s4_operand): likewise
> (stack_pop_up_to_s5_operand): likewise
> (stack_pop_up_to_s6_operand): likewise
> (stack_pop_up_to_s7_operand): likewise
> (stack_pop_up_to_s8_operand): likewise
> (stack_pop_up_to_s9_operand): likewise
> (stack_pop_up_to_s11_operand): likewise
> * config/riscv/riscv-protos.h (riscv_zcmp_valid_slot_offset_p): declaration
> (riscv_zcmp_valid_stack_adj_bytes_p): declaration
> * config/riscv/riscv.cc (struct riscv_frame_info): comment change
> (riscv_avoid_multi_push): helper function of riscv_use_multi_push
> (riscv_use_multi_push): true if multi push is used
> (riscv_multi_push_sregs_count): num of sregs in multi-push
> (riscv_multi_push_regs_count): num of regs in multi-push
> (riscv_16bytes_align): align to 16 bytes
> (riscv_stack_align): moved to a better place
> (riscv_save_libcall_count): no functional change
> (riscv_compute_frame_info): add zcmp frame info
> (riscv_adjust_multi_push_cfi_prologue): adjust cfi for cm.push
> (get_slot_offset_rtx): get the rtx of slot to push or pop
> (riscv_gen_multi_push_pop_insn): gen function for multi push and pop
> (riscv_expand_prologue): allocate stack by cm.push
> (riscv_adjust_multi_pop_cfi_epilogue): adjust cfi for cm.pop[ret]
> (riscv_expand_epilogue): allocate stack by cm.pop[ret]
> (zcmp_base_adj): calculate stack adjustment base size
> (zcmp_additional_adj): calculate stack adjustment additional size
> (riscv_zcmp_valid_slot_offset_p): check if offset is valid for a slot
> (riscv_zcmp_valid_stack_adj_bytes_p): check if stack adjustment size is valid
> * config/riscv/riscv.h (RETURN_ADDR_MASK): mask of ra
> (S0_MASK): likewise
> (S1_MASK): likewise
> (S2_MASK): likewise
> (S3_MASK): likewise
> (S4_MASK): likewise
> (S5_MASK): likewise
> (S6_MASK): likewise
> (S7_MASK): likewise
> (S8_MASK): likewise
> (S9_MASK): likewise
> (S10_MASK): likewise
> (S11_MASK): likewise
> (MULTI_PUSH_GPR_MASK): GPR_MASK that cm.push can cover at most
> (ZCMP_MAX_SPIMM): max spimm value
> (ZCMP_SP_INC_STEP): zcmp sp increment step
> (ZCMP_INVALID_S0S10_SREGS_COUNTS): num of s0-s10
> (ZCMP_S0S11_SREGS_COUNTS): num of s0-s11
> (ZCMP_MAX_GRP_SLOTS): max slots of pushing and poping in zcmp
> * config/riscv/riscv.md: include zc.md
> * config/riscv/zc.md: New file. machine description for zcmp
>gcc/testsuite/ChangeLog:
> * gcc.target/riscv/rv32e_zcmp.c: New test.
> * gcc.target/riscv/rv32i_zcmp.c: New test.
> * gcc.target/riscv/zcmp_stack_alignment.c: New test.
>---
> gcc/config/riscv/predicates.md | 148 +++
> gcc/config/riscv/riscv-protos.h | 2 +
> gcc/config/riscv/riscv.cc | 477 +++++++-
> gcc/config/riscv/riscv.h | 23 +
> gcc/config/riscv/riscv.md | 2 +
> gcc/config/riscv/zc.md | 1042 +++++++++++++++++
> gcc/testsuite/gcc.target/riscv/rv32e_zcmp.c | 239 ++++
> gcc/testsuite/gcc.target/riscv/rv32i_zcmp.c | 239 ++++
> .../gcc.target/riscv/zcmp_stack_alignment.c | 23 +
> 9 files changed, 2155 insertions(+), 40 deletions(-)
> create mode 100644 gcc/config/riscv/zc.md
> create mode 100644 gcc/testsuite/gcc.target/riscv/rv32e_zcmp.c
> create mode 100644 gcc/testsuite/gcc.target/riscv/rv32i_zcmp.c
> create mode 100644 gcc/testsuite/gcc.target/riscv/zcmp_stack_alignment.c
>diff --git a/gcc/config/riscv/predicates.md b/gcc/config/riscv/predicates.md
>index e5adf06fa25..d3d30dc67f7 100644
>--- a/gcc/config/riscv/predicates.md
>+++ b/gcc/config/riscv/predicates.md
>@@ -59,6 +59,154 @@
> (ior (match_operand 0 "const_0_operand")
> (match_operand 0 "register_operand")))
>+(define_predicate "slot_0_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 0)")))
>+
>+(define_predicate "slot_1_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 1)")))
>+
>+(define_predicate "slot_2_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 2)")))
>+
>+(define_predicate "slot_3_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 3)")))
>+
>+(define_predicate "slot_4_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 4)")))
>+
>+(define_predicate "slot_5_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 5)")))
>+
>+(define_predicate "slot_6_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 6)")))
>+
>+(define_predicate "slot_7_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 7)")))
>+
>+(define_predicate "slot_8_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 8)")))
>+
>+(define_predicate "slot_9_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 9)")))
>+
>+(define_predicate "slot_10_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 10)")))
>+
>+(define_predicate "slot_11_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 11)")))
>+
>+(define_predicate "slot_12_offset_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_slot_offset_p (INTVAL (op), 12)")))
>+
>+(define_predicate "stack_push_up_to_ra_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 1)")))
>+
>+(define_predicate "stack_push_up_to_s0_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 2)")))
>+
>+(define_predicate "stack_push_up_to_s1_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 3)")))
>+
>+(define_predicate "stack_push_up_to_s2_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 4)")))
>+
>+(define_predicate "stack_push_up_to_s3_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 5)")))
>+
>+(define_predicate "stack_push_up_to_s4_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 6)")))
>+
>+(define_predicate "stack_push_up_to_s5_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 7)")))
>+
>+(define_predicate "stack_push_up_to_s6_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 8)")))
>+
>+(define_predicate "stack_push_up_to_s7_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 9)")))
>+
>+(define_predicate "stack_push_up_to_s8_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 10)")))
>+
>+(define_predicate "stack_push_up_to_s9_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 11)")))
>+
>+(define_predicate "stack_push_up_to_s11_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op) * -1, 13)")))
>+
>+(define_predicate "stack_pop_up_to_ra_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 1)")))
>+
>+(define_predicate "stack_pop_up_to_s0_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 2)")))
>+
>+(define_predicate "stack_pop_up_to_s1_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 3)")))
>+
>+(define_predicate "stack_pop_up_to_s2_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 4)")))
>+
>+(define_predicate "stack_pop_up_to_s3_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 5)")))
>+
>+(define_predicate "stack_pop_up_to_s4_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 6)")))
>+
>+(define_predicate "stack_pop_up_to_s5_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 7)")))
>+
>+(define_predicate "stack_pop_up_to_s6_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 8)")))
>+
>+(define_predicate "stack_pop_up_to_s7_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 9)")))
>+
>+(define_predicate "stack_pop_up_to_s8_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 10)")))
>+
>+(define_predicate "stack_pop_up_to_s9_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 11)")))
>+
>+(define_predicate "stack_pop_up_to_s11_operand"
>+ (and (match_code "const_int")
>+ (match_test "riscv_zcmp_valid_stack_adj_bytes_p (INTVAL (op), 13)")))
>+
> ;; Only use branch-on-bit sequences when the mask is not an ANDI immediate.
> (define_predicate "branch_on_bit_operand"
> (and (match_code "const_int")
>diff --git a/gcc/config/riscv/riscv-protos.h b/gcc/config/riscv/riscv-protos.h
>index 7760a9cac8d..f0ea14f05be 100644
>--- a/gcc/config/riscv/riscv-protos.h
>+++ b/gcc/config/riscv/riscv-protos.h
>@@ -56,6 +56,8 @@ extern bool riscv_split_64bit_move_p (rtx, rtx);
> extern void riscv_split_doubleword_move (rtx, rtx);
> extern const char *riscv_output_move (rtx, rtx);
> extern const char *riscv_output_return ();
>+extern bool riscv_zcmp_valid_slot_offset_p (HOST_WIDE_INT, int);
>+extern bool riscv_zcmp_valid_stack_adj_bytes_p(HOST_WIDE_INT, int);
> #ifdef RTX_CODE
> extern void riscv_expand_int_scc (rtx, enum rtx_code, rtx, rtx);
>diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
>index 629e5e45cac..a0a2db1f594 100644
>--- a/gcc/config/riscv/riscv.cc
>+++ b/gcc/config/riscv/riscv.cc
>@@ -117,6 +117,14 @@ struct GTY(()) riscv_frame_info {
> /* How much the GPR save/restore routines adjust sp (or 0 if unused). */
> unsigned save_libcall_adjustment;
>+ /* the minimum number of bytes, in multiples of 16-byte address increments,
>+ required to cover the registers in a multi push & pop. */
>+ unsigned multi_push_adj_base;
>+
>+ /* the number of additional 16-byte address increments allocated for the 
>stack frame
>+ in a multi push & pop. */
>+ unsigned multi_push_adj_addi;
>+
> /* Offsets of fixed-point and floating-point save areas from frame bottom */
> poly_int64 gp_sp_offset;
> poly_int64 fp_sp_offset;
>@@ -413,6 +421,21 @@ static const struct riscv_tune_info 
>riscv_tune_info_table[] = {
> #include "riscv-cores.def"
> };
>+typedef enum
>+{
>+ SI_IDX = 0,
>+ DI_IDX,
>+ ZCMP_MODE_NUM = DI_IDX
>+} mode_idx;
>+
>+typedef enum
>+{
>+ PUSH_IDX = 0,
>+ POP_IDX,
>+ POPRET_IDX,
>+ ZCMP_OP_NUM = POPRET_IDX
>+} op_idx;
>+
> void riscv_frame_info::reset(void)
> {
> total_size = 0;
>@@ -4844,6 +4867,37 @@ riscv_save_reg_p (unsigned int regno)
> return false;
> }
>+/* Return TRUE if Zcmp push and pop insns should be
>+ avoided. FALSE otherwise.
>+ Only use multi push & pop if all GPRs masked can be covered,
>+ and stack access is SP based,
>+ and GPRs are at top of the stack frame,
>+ and no conflicts in stack allocation with other features */
>+static bool
>+riscv_avoid_multi_push(const struct riscv_frame_info *frame)
>+{
>+ if (!TARGET_ZCMP
>+ || crtl->calls_eh_return
>+ || frame_pointer_needed
>+ || cfun->machine->interrupt_handler_p
>+ || cfun->machine->varargs_size != 0
>+ || crtl->args.pretend_args_size != 0
>+ || (frame->mask & ~ MULTI_PUSH_GPR_MASK))
>+ return true;
>+
>+ return false;
>+}
>+
>+/* Determine whether to use multi push insn. */
>+static bool
>+riscv_use_multi_push(const struct riscv_frame_info *frame)
>+{
>+ if (riscv_avoid_multi_push (frame))
>+ return false;
>+
>+ return (frame->multi_push_adj_base != 0);
>+}
>+
> /* Return TRUE if a libcall to save/restore GPRs should be
> avoided. FALSE otherwise. */
> static bool
>@@ -4881,6 +4935,51 @@ riscv_save_libcall_count (unsigned mask)
> abort ();
> }
>+/* calculate number of s regs in multi push and pop.
>+ Note that {s0-s10} is not valid in Zcmp, use {s0-s11} instead. */
>+static unsigned
>+riscv_multi_push_sregs_count (unsigned mask)
>+{
>+ unsigned num = riscv_save_libcall_count (mask);
>+ return (num == ZCMP_INVALID_S0S10_SREGS_COUNTS)
>+ ? ZCMP_S0S11_SREGS_COUNTS
>+ : num;
>+}
>+
>+/* calculate number of regs(ra, s0-sx) in multi push and pop. */
>+static unsigned
>+riscv_multi_push_regs_count (unsigned mask)
>+{
>+ /* 1 is for ra */
>+ return riscv_multi_push_sregs_count (mask) + 1;
>+}
>+
>+/* Handle 16 bytes align for poly_int. */
>+static poly_int64
>+riscv_16bytes_align (poly_int64 value)
>+{
>+ return aligned_upper_bound (value, 16);
>+}
>+
>+static HOST_WIDE_INT
>+riscv_16bytes_align (HOST_WIDE_INT value)
>+{
>+ return ROUND_UP(value, 16);
>+}
>+
>+/* Handle stack align for poly_int. */
>+static poly_int64
>+riscv_stack_align (poly_int64 value)
>+{
>+ return aligned_upper_bound (value, PREFERRED_STACK_BOUNDARY / 8);
>+}
>+
>+static HOST_WIDE_INT
>+riscv_stack_align (HOST_WIDE_INT value)
>+{
>+ return RISCV_STACK_ALIGN (value);
>+}
>+
> /* Populate the current function's riscv_frame_info structure.
> RISC-V stack frames grown downward. High addresses are at the top.
>@@ -4906,7 +5005,7 @@ riscv_save_libcall_count (unsigned mask)
> | GPR save area | + UNITS_PER_WORD
> | |
> +-------------------------------+ <-- stack_pointer_rtx + fp_sp_offset
>- | | + UNITS_PER_HWVALUE
>+ | | + UNITS_PER_FP_REG
> | FPR save area |
> | |
> +-------------------------------+ <-- frame_pointer_rtx (virtual)
>@@ -4925,19 +5024,6 @@ riscv_save_libcall_count (unsigned mask)
> static HOST_WIDE_INT riscv_first_stack_step (struct riscv_frame_info *frame, 
> poly_int64 remaining_size);
>-/* Handle stack align for poly_int. */
>-static poly_int64
>-riscv_stack_align (poly_int64 value)
>-{
>- return aligned_upper_bound (value, PREFERRED_STACK_BOUNDARY / 8);
>-}
>-
>-static HOST_WIDE_INT
>-riscv_stack_align (HOST_WIDE_INT value)
>-{
>- return RISCV_STACK_ALIGN (value);
>-}
>-
> static void
> riscv_compute_frame_info (void)
> {
>@@ -4985,8 +5071,9 @@ riscv_compute_frame_info (void)
> if (frame->mask)
> {
> x_save_size = riscv_stack_align (num_x_saved * UNITS_PER_WORD);
>- unsigned num_save_restore = 1 + riscv_save_libcall_count (frame->mask);
>+ /* 1 is for ra */
>+ unsigned num_save_restore = 1 + riscv_save_libcall_count (frame->mask);
> /* Only use save/restore routines if they don't alter the stack size. */
> if (riscv_stack_align (num_save_restore * UNITS_PER_WORD) == x_save_size
> && !riscv_avoid_save_libcall ())
>@@ -4998,6 +5085,15 @@ riscv_compute_frame_info (void)
> frame->save_libcall_adjustment = x_save_size;
> }
>+
>+ if (!riscv_avoid_multi_push (frame))
>+ {
>+ /* num(ra, s0-sx) */
>+ unsigned num_multi_push =
>+ riscv_multi_push_regs_count (frame->mask);
>+ x_save_size = riscv_stack_align (num_multi_push * UNITS_PER_WORD);
>+ frame->multi_push_adj_base = riscv_16bytes_align (x_save_size);
>+ }
> }
> /* At the bottom of the frame are any outgoing stack arguments. */
>@@ -5012,7 +5108,15 @@ riscv_compute_frame_info (void)
> frame->fp_sp_offset = offset - UNITS_PER_FP_REG;
> /* Next are the callee-saved GPRs. */
> if (frame->mask)
>- offset += x_save_size;
>+ {
>+ offset += x_save_size;
>+ /* align to 16 bytes and add paddings to GPR part to honor
>+ both stack alignment and zcmp pus/pop size alignment. */
>+ if (riscv_use_multi_push (frame)
>+ && known_lt(offset,
>+ frame->multi_push_adj_base + ZCMP_SP_INC_STEP * ZCMP_MAX_SPIMM))
>+ offset = riscv_16bytes_align (offset);
>+ }
> frame->gp_sp_offset = offset - UNITS_PER_WORD;
> /* The hard frame pointer points above the callee-saved GPRs. */
> frame->hard_frame_pointer_offset = offset;
>@@ -5356,6 +5460,42 @@ riscv_adjust_libcall_cfi_prologue ()
> return dwarf;
> }
>+static rtx
>+riscv_adjust_multi_push_cfi_prologue (int saved_size)
>+{
>+ rtx dwarf = NULL_RTX;
>+ rtx adjust_sp_rtx, reg, mem, insn;
>+ unsigned int mask = cfun->machine->frame.mask;
>+ int offset;
>+ int saved_cnt = 0;
>+
>+ if (mask & S10_MASK)
>+ mask |= S11_MASK;
>+
>+ for (int regno = GP_REG_LAST; regno >= GP_REG_FIRST; regno--)
>+ if (BITSET_P (mask & MULTI_PUSH_GPR_MASK, regno - GP_REG_FIRST))
>+ {
>+ /* The save order is s11-s0, ra
>+ from high to low addr. */
>+ offset = saved_size - UNITS_PER_WORD * (++saved_cnt);
>+
>+ reg = gen_rtx_REG (SImode, regno);
>+ mem = gen_frame_mem (SImode, plus_constant (Pmode,
>+ stack_pointer_rtx,
>+ offset));
>+
>+ insn = gen_rtx_SET (mem, reg);
>+ dwarf = alloc_reg_note (REG_CFA_OFFSET, insn, dwarf);
>+ }
>+
>+ /* Debug info for adjust sp. */
>+ adjust_sp_rtx = gen_rtx_SET (stack_pointer_rtx,
>+ plus_constant(Pmode, stack_pointer_rtx, -saved_size));
>+ dwarf = alloc_reg_note (REG_CFA_ADJUST_CFA, adjust_sp_rtx,
>+ dwarf);
>+ return dwarf;
>+}
>+
> static void
> riscv_emit_stack_tie (void)
> {
>@@ -5365,6 +5505,152 @@ riscv_emit_stack_tie (void)
> emit_insn (gen_stack_tiedi (stack_pointer_rtx, hard_frame_pointer_rtx));
> }
>+static rtx
>+get_slot_offset_rtx (int slot_idx)
>+{
>+ HOST_WIDE_INT slot_offset = -1 * (slot_idx + 1) * GET_MODE_SIZE (word_mode);
>+ return GEN_INT (slot_offset);
>+}
>+
>+/*zcmp multi push and pop function ptr array */
>+const insn_gen_fn gen_push_pop [ZCMP_OP_NUM + 1][ZCMP_MODE_NUM + 
>1][ZCMP_MAX_GRP_SLOTS] =
>+{{{(insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_ra_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s0_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s1_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s2_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s3_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s4_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s5_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s6_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s7_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s8_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s9_si,
>+ NULL,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s11_si},
>+ {(insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_ra_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s0_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s1_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s2_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s3_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s4_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s5_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s6_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s7_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s8_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s9_di,
>+ NULL,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_push_up_to_s11_di}},
>+ {{(insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_ra_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s0_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s1_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s2_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s3_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s4_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s5_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s6_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s7_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s8_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s9_si,
>+ NULL,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s11_si},
>+ {(insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_ra_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s0_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s1_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s2_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s3_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s4_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s5_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s6_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s7_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s8_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s9_di,
>+ NULL,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_pop_up_to_s11_di}},
>+ {{(insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_ra_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s0_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s1_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s2_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s3_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s4_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s5_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s6_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s7_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s8_si,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s9_si,
>+ NULL,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s11_si},
>+ {(insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_ra_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s0_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s1_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s2_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s3_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s4_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s5_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s6_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s7_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s8_di,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s9_di,
>+ NULL,
>+ (insn_gen_fn::stored_funcptr) gen_gpr_multi_popret_up_to_s11_di}}};
>+
>+static rtx
>+riscv_gen_multi_push_pop_insn (op_idx op, HOST_WIDE_INT adj_size, unsigned 
>int regs_num)
>+{
>+ rtx stack_adj = GEN_INT (adj_size);
>+ rtx slots[ZCMP_MAX_GRP_SLOTS];
>+
>+ for (int slot_idx = 0; slot_idx < ZCMP_MAX_GRP_SLOTS; slot_idx++)
>+ slots[slot_idx] = get_slot_offset_rtx (slot_idx);
>+
>+ switch (regs_num)
>+ {
>+ case 1:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0]);
>+ case 2:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1]);
>+ case 3:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2]);
>+ case 4:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2], slots[3]);
>+ case 5:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2], slots[3], slots[4]);
>+ case 6:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2], slots[3], slots[4], slots[5]);
>+ case 7:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2], slots[3], slots[4], slots[5],
>+ slots[6]);
>+ case 8:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2], slots[3], slots[4], slots[5],
>+ slots[6], slots[7]);
>+ case 9:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2], slots[3], slots[4], slots[5],
>+ slots[6], slots[7], slots[8]);
>+ case 10:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2], slots[3], slots[4], slots[5],
>+ slots[6], slots[7], slots[8], slots[9]);
>+ case 11:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2], slots[3], slots[4], slots[5],
>+ slots[6], slots[7], slots[8], slots[9], slots[10]);
>+ case 13:
>+ return (gen_push_pop[op][TARGET_64BIT][regs_num - 1])
>+ (stack_adj, slots[0], slots[1], slots[2], slots[3], slots[4], slots[5],
>+ slots[6], slots[7], slots[8], slots[9], slots[10], slots[11], slots[12]);
>+ default:
>+ gcc_unreachable ();
>+ }
>+}
>+
> /* Expand the "prologue" pattern. */
> void
>@@ -5373,7 +5659,8 @@ riscv_expand_prologue (void)
> struct riscv_frame_info *frame = &cfun->machine->frame;
> poly_int64 remaining_size = frame->total_size;
> unsigned mask = frame->mask;
>- rtx insn;
>+ int spimm, multi_push_additional, stack_adj;
>+ rtx insn, dwarf = NULL_RTX;
> if (flag_stack_usage_info)
> current_function_static_stack_size = constant_lower_bound (remaining_size);
>@@ -5381,8 +5668,35 @@ riscv_expand_prologue (void)
> if (cfun->machine->naked_p)
> return;
>+ /* prefer muti-push to save-restore libcall. */
>+ if (riscv_use_multi_push(frame))
>+ {
>+ remaining_size -= frame->multi_push_adj_base;
>+ if (known_gt(remaining_size, 2 * ZCMP_SP_INC_STEP))
>+ spimm = 3;
>+ else if (known_gt(remaining_size, ZCMP_SP_INC_STEP))
>+ spimm = 2;
>+ else if (known_gt(remaining_size, 0))
>+ spimm = 1;
>+ else
>+ spimm = 0;
>+ multi_push_additional = spimm * ZCMP_SP_INC_STEP;
>+ frame->multi_push_adj_addi = multi_push_additional;
>+ remaining_size -= multi_push_additional;
>+
>+ /* emit multi push insn & dwarf along with it. */
>+ stack_adj = frame->multi_push_adj_base + multi_push_additional;
>+ insn = emit_insn (riscv_gen_multi_push_pop_insn(PUSH_IDX,
>+ -stack_adj, riscv_multi_push_regs_count(frame->mask)));
>+ dwarf = riscv_adjust_multi_push_cfi_prologue (stack_adj);
>+ RTX_FRAME_RELATED_P (insn) = 1;
>+ REG_NOTES (insn) = dwarf;
>+
>+ /* Temporarily fib that we need not save GPRs. */
>+ frame->mask = 0;
>+ }
> /* When optimizing for size, call a subroutine to save the registers. */
>- if (riscv_use_save_libcall (frame))
>+ else if (riscv_use_save_libcall (frame))
> {
> rtx dwarf = NULL_RTX;
> dwarf = riscv_adjust_libcall_cfi_prologue ();
>@@ -5398,13 +5712,15 @@ riscv_expand_prologue (void)
> /* Save the registers. */
> if ((frame->mask | frame->fmask) != 0)
> {
>- HOST_WIDE_INT step1 = riscv_first_stack_step (frame, remaining_size);
>-
>- insn = gen_add3_insn (stack_pointer_rtx,
>- stack_pointer_rtx,
>- GEN_INT (-step1));
>- RTX_FRAME_RELATED_P (emit_insn (insn)) = 1;
>- remaining_size -= step1;
>+ if (known_gt (remaining_size, frame->frame_pointer_offset))
>+ {
>+ HOST_WIDE_INT step1 = riscv_first_stack_step (frame, remaining_size);
>+ remaining_size -= step1;
>+ insn = gen_add3_insn (stack_pointer_rtx,
>+ stack_pointer_rtx,
>+ GEN_INT (-step1));
>+ RTX_FRAME_RELATED_P (emit_insn (insn)) = 1;
>+ }
> riscv_for_each_saved_reg (remaining_size, riscv_save_reg, false, false);
> }
>@@ -5461,6 +5777,32 @@ riscv_expand_prologue (void)
> }
> }
>+static rtx
>+riscv_adjust_multi_pop_cfi_epilogue (int saved_size)
>+{
>+ rtx dwarf = NULL_RTX;
>+ rtx adjust_sp_rtx, reg;
>+ unsigned int mask = cfun->machine->frame.mask;
>+
>+ if (mask & S10_MASK)
>+ mask |= S11_MASK;
>+
>+ /* Debug info for adjust sp. */
>+ adjust_sp_rtx = gen_rtx_SET (stack_pointer_rtx,
>+ plus_constant(Pmode, stack_pointer_rtx, saved_size));
>+ dwarf = alloc_reg_note (REG_CFA_ADJUST_CFA, adjust_sp_rtx,
>+ dwarf);
>+
>+ for (int regno = GP_REG_FIRST; regno <= GP_REG_LAST; regno++)
>+ if (BITSET_P (mask, regno - GP_REG_FIRST))
>+ {
>+ reg = gen_rtx_REG (SImode, regno);
>+ dwarf = alloc_reg_note (REG_CFA_RESTORE, reg, dwarf);
>+ }
>+
>+ return dwarf;
>+}
>+
> static rtx
> riscv_adjust_libcall_cfi_epilogue ()
> {
>@@ -5500,10 +5842,18 @@ riscv_expand_epilogue (int style)
> struct riscv_frame_info *frame = &cfun->machine->frame;
> unsigned mask = frame->mask;
> HOST_WIDE_INT step2 = 0;
>- bool use_restore_libcall = ((style == NORMAL_RETURN)
>- && riscv_use_save_libcall (frame));
>- unsigned libcall_size = (use_restore_libcall
>- ? frame->save_libcall_adjustment : 0);
>+ bool use_multi_pop_normal = ((style == NORMAL_RETURN)
>+ && riscv_use_multi_push (frame));
>+ bool use_multi_pop_sibcall = ((style == SIBCALL_RETURN)
>+ && riscv_use_multi_push (frame));
>+ bool use_multi_pop = use_multi_pop_normal || use_multi_pop_sibcall;
>+
>+ bool use_restore_libcall = !use_multi_pop && ((style == NORMAL_RETURN)
>+ && riscv_use_save_libcall (frame));
>+ unsigned libcall_size = use_restore_libcall && !use_multi_pop ?
>+ frame->save_libcall_adjustment : 0;
>+ unsigned multipop_size = use_multi_pop ?
>+ frame->multi_push_adj_base + frame->multi_push_adj_addi : 0;
> rtx ra = gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM);
> rtx insn;
>@@ -5574,18 +5924,25 @@ riscv_expand_epilogue (int style)
> REG_NOTES (insn) = dwarf;
> }
>- if (use_restore_libcall)
>- frame->mask = 0; /* Temporarily fib for GPRs. */
>+ if (use_restore_libcall || use_multi_pop)
>+ frame->mask = 0; /* Temporarily fib that we need not save GPRs. */
> /* If we need to restore registers, deallocate as much stack as
> possible in the second step without going out of range. */
>- if ((frame->mask | frame->fmask) != 0)
>+ if (use_multi_pop)
>+ {
>+ if (frame->fmask
>+ && known_gt (frame->total_size - multipop_size,
>+ frame->frame_pointer_offset))
>+ step2 = riscv_first_stack_step (frame, frame->total_size - multipop_size);
>+ }
>+ else if ((frame->mask | frame->fmask) != 0)
> step2 = riscv_first_stack_step (frame, frame->total_size - libcall_size);
>- if (use_restore_libcall)
>+ if (use_restore_libcall || use_multi_pop)
> frame->mask = mask; /* Undo the above fib. */
>- poly_int64 step1 = frame->total_size - step2 - libcall_size;
>+ poly_int64 step1 = frame->total_size - step2 - libcall_size - multipop_size ;
> /* Set TARGET to BASE + STEP1. */
> if (known_gt (step1, 0))
>@@ -5620,7 +5977,7 @@ riscv_expand_epilogue (int style)
> adjust));
> rtx dwarf = NULL_RTX;
> rtx cfa_adjust_rtx = gen_rtx_PLUS (Pmode, stack_pointer_rtx,
>- GEN_INT (step2));
>+ GEN_INT (step2 + libcall_size + multipop_size));
> dwarf = alloc_reg_note (REG_CFA_DEF_CFA, cfa_adjust_rtx, dwarf);
> RTX_FRAME_RELATED_P (insn) = 1;
>@@ -5635,15 +5992,15 @@ riscv_expand_epilogue (int style)
> epilogue_cfa_sp_offset = step2;
> }
>- if (use_restore_libcall)
>+ if (use_restore_libcall || use_multi_pop)
> frame->mask = 0; /* Temporarily fib that we need not save GPRs. */
> /* Restore the registers. */
>- riscv_for_each_saved_reg (frame->total_size - step2 - libcall_size,
>+ riscv_for_each_saved_reg (frame->total_size - step2 - libcall_size - 
>multipop_size,
> riscv_restore_reg,
> true, style == EXCEPTION_RETURN);
>- if (use_restore_libcall)
>+ if (use_restore_libcall || use_multi_pop)
> frame->mask = mask; /* Undo the above fib. */
> if (need_barrier_p)
>@@ -5657,14 +6014,30 @@ riscv_expand_epilogue (int style)
> rtx dwarf = NULL_RTX;
> rtx cfa_adjust_rtx = gen_rtx_PLUS (Pmode, stack_pointer_rtx,
>- const0_rtx);
>+ GEN_INT (libcall_size + multipop_size));
> dwarf = alloc_reg_note (REG_CFA_DEF_CFA, cfa_adjust_rtx, dwarf);
> RTX_FRAME_RELATED_P (insn) = 1;
> REG_NOTES (insn) = dwarf;
> }
>- if (use_restore_libcall)
>+ if (use_multi_pop)
>+ {
>+ unsigned regs_count = riscv_multi_push_regs_count (frame->mask);
>+ if (use_multi_pop_normal)
>+ insn = emit_jump_insn (
>+ riscv_gen_multi_push_pop_insn (POPRET_IDX, multipop_size, regs_count));
>+ else
>+ insn= emit_insn (
>+ riscv_gen_multi_push_pop_insn(POP_IDX, multipop_size, regs_count));
>+
>+ rtx dwarf = riscv_adjust_multi_pop_cfi_epilogue (multipop_size);
>+ RTX_FRAME_RELATED_P (insn) = 1;
>+ REG_NOTES (insn) = dwarf;
>+ if (use_multi_pop_normal)
>+ return;
>+ }
>+ else if (use_restore_libcall)
> {
> rtx dwarf = riscv_adjust_libcall_cfi_epilogue ();
> insn = emit_insn (gen_gpr_restore (GEN_INT (riscv_save_libcall_count 
> (mask))));
>@@ -6937,6 +7310,30 @@ riscv_gen_gpr_save_insn (struct riscv_frame_info *frame)
> return gen_rtx_PARALLEL (VOIDmode, vec);
> }
>+static HOST_WIDE_INT zcmp_base_adj(int regs_num)
>+{
>+ return riscv_16bytes_align ((regs_num) * GET_MODE_SIZE (word_mode));
>+}
>+
>+static HOST_WIDE_INT zcmp_additional_adj(HOST_WIDE_INT total, int regs_num)
>+{
>+ return total - zcmp_base_adj(regs_num);
>+}
>+
>+bool riscv_zcmp_valid_slot_offset_p (HOST_WIDE_INT offset, int slot_idx)
>+{
>+ return offset == -1 * (slot_idx + 1) * GET_MODE_SIZE (word_mode);
>+}
>+
>+bool riscv_zcmp_valid_stack_adj_bytes_p (HOST_WIDE_INT total, int regs_num)
>+{
>+ HOST_WIDE_INT additioanl_bytes = zcmp_additional_adj(total, regs_num);
>+ return additioanl_bytes == 0
>+ || additioanl_bytes == 1 * ZCMP_SP_INC_STEP
>+ || additioanl_bytes == 2 * ZCMP_SP_INC_STEP
>+ || additioanl_bytes == ZCMP_MAX_SPIMM * ZCMP_SP_INC_STEP;
>+}
>+
> /* Return true if it's valid gpr_save pattern. */
> bool
>diff --git a/gcc/config/riscv/riscv.h b/gcc/config/riscv/riscv.h
>index 13038a39e5c..ff210083004 100644
>--- a/gcc/config/riscv/riscv.h
>+++ b/gcc/config/riscv/riscv.h
>@@ -413,6 +413,29 @@ ASM_MISA_SPEC
> #define RISCV_CALL_ADDRESS_TEMP(MODE) \
> gen_rtx_REG (MODE, RISCV_CALL_ADDRESS_TEMP_REGNUM)
>+#define RETURN_ADDR_MASK ( 1 << RETURN_ADDR_REGNUM)
>+#define S0_MASK ( 1 << S0_REGNUM)
>+#define S1_MASK ( 1 << S1_REGNUM)
>+#define S2_MASK ( 1 << S2_REGNUM)
>+#define S3_MASK ( 1 << S3_REGNUM)
>+#define S4_MASK ( 1 << S4_REGNUM)
>+#define S5_MASK ( 1 << S5_REGNUM)
>+#define S6_MASK ( 1 << S6_REGNUM)
>+#define S7_MASK ( 1 << S7_REGNUM)
>+#define S8_MASK ( 1 << S8_REGNUM)
>+#define S9_MASK ( 1 << S9_REGNUM)
>+#define S10_MASK ( 1 << S10_REGNUM)
>+#define S11_MASK ( 1 << S11_REGNUM)
>+
>+#define MULTI_PUSH_GPR_MASK ( RETURN_ADDR_MASK | S0_MASK | S1_MASK | S2_MASK 
>| S3_MASK \
>+ | S4_MASK | S5_MASK | S6_MASK | S7_MASK \
>+ | S8_MASK | S9_MASK | S10_MASK | S11_MASK )
>+#define ZCMP_MAX_SPIMM 3
>+#define ZCMP_SP_INC_STEP 16
>+#define ZCMP_INVALID_S0S10_SREGS_COUNTS 11
>+#define ZCMP_S0S11_SREGS_COUNTS 12
>+#define ZCMP_MAX_GRP_SLOTS 13
>+
> #define MCOUNT_NAME "_mcount"
> #define NO_PROFILE_COUNTERS 1
>diff --git a/gcc/config/riscv/riscv.md b/gcc/config/riscv/riscv.md
>index 7065e68c0b7..73fc8cb69bc 100644
>--- a/gcc/config/riscv/riscv.md
>+++ b/gcc/config/riscv/riscv.md
>@@ -113,6 +113,7 @@
> (define_constants
> [(RETURN_ADDR_REGNUM 1)
>+ (SP_REGNUM 2)
> (GP_REGNUM 3)
> (TP_REGNUM 4)
> (T0_REGNUM 5)
>@@ -3205,3 +3206,4 @@
> (include "sifive-7.md")
> (include "thead.md")
> (include "vector.md")
>+(include "zc.md")
>diff --git a/gcc/config/riscv/zc.md b/gcc/config/riscv/zc.md
>new file mode 100644
>index 00000000000..6e6c87983fb
>--- /dev/null
>+++ b/gcc/config/riscv/zc.md
>@@ -0,0 +1,1042 @@
>+;; Machine description for RISC-V Zc extention.
>+;; Copyright (C) 2011-2023 Free Software Foundation, Inc.
>+;; Contributed by Fei Gao (gao...@eswincomputing.com).
>+
>+;; This file is part of GCC.
>+
>+;; GCC is free software; you can redistribute it and/or modify
>+;; it under the terms of the GNU General Public License as published by
>+;; the Free Software Foundation; either version 3, or (at your option)
>+;; any later version.
>+
>+;; GCC is distributed in the hope that it will be useful,
>+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
>+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
>+;; GNU General Public License for more details.
>+
>+;; You should have received a copy of the GNU General Public License
>+;; along with GCC; see the file COPYING3. If not see
>+;; <http://www.gnu.org/licenses/>.
>+
>+(define_insn "gpr_multi_pop_up_to_ra_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_ra_operand" "I")))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s0_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s0_operand" "I")))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s1_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s1_operand" "I")))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s1}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s2_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s2_operand" "I")))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s2}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s3_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s3_operand" "I")))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s3}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s4_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s4_operand" "I")))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s4}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s5_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s5_operand" "I")))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s5}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s6_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s6_operand" "I")))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s6}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s7_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s7_operand" "I")))
>+ (set (reg:X S7_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s7}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s8_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s8_operand" "I")))
>+ (set (reg:X S8_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S7_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 10 "slot_9_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s8}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s9_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s9_operand" "I")))
>+ (set (reg:X S9_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S8_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S7_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 10 "slot_9_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 11 "slot_10_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s9}, %0"
>+)
>+
>+(define_insn "gpr_multi_pop_up_to_s11_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s11_operand" "I")))
>+ (set (reg:X S11_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S10_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S9_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S8_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S7_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 10 "slot_9_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 11 "slot_10_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 12 "slot_11_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 13 "slot_12_offset_operand" "I"))))]
>+ "TARGET_ZCMP"
>+ "cm.pop {ra, s0-s11}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_ra_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_ra_operand" "I")))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s0_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s0_operand" "I")))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s1_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s1_operand" "I")))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s1}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s2_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s2_operand" "I")))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s2}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s3_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s3_operand" "I")))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s3}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s4_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s4_operand" "I")))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s4}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s5_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s5_operand" "I")))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s5}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s6_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s6_operand" "I")))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s6}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s7_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s7_operand" "I")))
>+ (set (reg:X S7_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s7}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s8_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s8_operand" "I")))
>+ (set (reg:X S8_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S7_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 10 "slot_9_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s8}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s9_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s9_operand" "I")))
>+ (set (reg:X S9_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S8_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S7_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 10 "slot_9_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 11 "slot_10_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s9}, %0"
>+)
>+
>+(define_insn "gpr_multi_popret_up_to_s11_<mode>"
>+ [(set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_pop_up_to_s11_operand" "I")))
>+ (set (reg:X S11_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I"))))
>+ (set (reg:X S10_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I"))))
>+ (set (reg:X S9_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I"))))
>+ (set (reg:X S8_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I"))))
>+ (set (reg:X S7_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I"))))
>+ (set (reg:X S6_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I"))))
>+ (set (reg:X S5_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I"))))
>+ (set (reg:X S4_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I"))))
>+ (set (reg:X S3_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I"))))
>+ (set (reg:X S2_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 10 "slot_9_offset_operand" "I"))))
>+ (set (reg:X S1_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 11 "slot_10_offset_operand" "I"))))
>+ (set (reg:X S0_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 12 "slot_11_offset_operand" "I"))))
>+ (set (reg:X RETURN_ADDR_REGNUM)
>+ (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 13 "slot_12_offset_operand" "I"))))
>+ (return)
>+ (use (reg:SI RETURN_ADDR_REGNUM))]
>+ "TARGET_ZCMP"
>+ "cm.popret {ra, s0-s11}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_ra_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_ra_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s0_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s0_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s1_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s1_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s1}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s2_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S2_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s2_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s2}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s3_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S3_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S2_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s3_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s3}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s4_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S4_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S3_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X S2_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s4_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s4}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s5_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S5_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S4_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X S3_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I")))
>+ (reg:X S2_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s5_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s5}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s6_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S6_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S5_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X S4_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I")))
>+ (reg:X S3_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I")))
>+ (reg:X S2_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s6_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s6}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s7_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S7_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S6_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X S5_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I")))
>+ (reg:X S4_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I")))
>+ (reg:X S3_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I")))
>+ (reg:X S2_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s7_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s7}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s8_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S8_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S7_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X S6_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I")))
>+ (reg:X S5_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I")))
>+ (reg:X S4_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I")))
>+ (reg:X S3_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I")))
>+ (reg:X S2_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 10 "slot_9_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s8_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s8}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s9_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S9_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S8_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X S7_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I")))
>+ (reg:X S6_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I")))
>+ (reg:X S5_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I")))
>+ (reg:X S4_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I")))
>+ (reg:X S3_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I")))
>+ (reg:X S2_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 10 "slot_9_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 11 "slot_10_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s9_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s9}, %0"
>+)
>+
>+(define_insn "gpr_multi_push_up_to_s11_<mode>"
>+ [(set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 1 "slot_0_offset_operand" "I")))
>+ (reg:X S11_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 2 "slot_1_offset_operand" "I")))
>+ (reg:X S10_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 3 "slot_2_offset_operand" "I")))
>+ (reg:X S9_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 4 "slot_3_offset_operand" "I")))
>+ (reg:X S8_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 5 "slot_4_offset_operand" "I")))
>+ (reg:X S7_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 6 "slot_5_offset_operand" "I")))
>+ (reg:X S6_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 7 "slot_6_offset_operand" "I")))
>+ (reg:X S5_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 8 "slot_7_offset_operand" "I")))
>+ (reg:X S4_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 9 "slot_8_offset_operand" "I")))
>+ (reg:X S3_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 10 "slot_9_offset_operand" "I")))
>+ (reg:X S2_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 11 "slot_10_offset_operand" "I")))
>+ (reg:X S1_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 12 "slot_11_offset_operand" "I")))
>+ (reg:X S0_REGNUM))
>+ (set (mem:X (plus:X (reg:X SP_REGNUM)
>+ (match_operand:X 13 "slot_12_offset_operand" "I")))
>+ (reg:X RETURN_ADDR_REGNUM))
>+ (set (reg:X SP_REGNUM)
>+ (plus:X (reg:X SP_REGNUM)
>+ (match_operand 0 "stack_push_up_to_s11_operand" "I")))]
>+ "TARGET_ZCMP"
>+ "cm.push {ra, s0-s11}, %0"
>+)
>diff --git a/gcc/testsuite/gcc.target/riscv/rv32e_zcmp.c 
>b/gcc/testsuite/gcc.target/riscv/rv32e_zcmp.c
>new file mode 100644
>index 00000000000..6dbe489da9b
>--- /dev/null
>+++ b/gcc/testsuite/gcc.target/riscv/rv32e_zcmp.c
>@@ -0,0 +1,239 @@
>+/* { dg-do compile } */
>+/* { dg-options " -Os -march=rv32e_zca_zcmp -mabi=ilp32e -mcmodel=medlow" } */
>+/* { dg-skip-if "" { *-*-* } {"-O0" "-O1" "-O2" "-Og" "-O3" "-Oz" "-flto"} } 
>*/
>+/* { dg-final { check-function-bodies "**" "" } } */
>+
>+char my_getchar();
>+float getf();
>+int __attribute__((noinline)) incoming_stack_args
>+ (int arg0, int arg1, int arg2, int arg3,
>+ int arg4, int arg5, int arg6, int arg7, int arg8);
>+int getint();
>+void PrintInts (int n, ...); // varargs
>+void __attribute__((noinline)) PrintIntsNoVaStart (int n, ...); // varargs
>+void PrintInts2 (int arg0, int arg1, int arg2, int arg3, int arg4, int arg5, 
>int n, ...);
>+extern void f1(void);
>+extern void f2(void);
>+
>+/*
>+**test1:
>+** ...
>+** cm.push {ra, s0-s1}, -64
>+** ...
>+** cm.popret {ra, s0-s1}, 64
>+** ...
>+*/
>+int test1()
>+{
>+ char volatile array[3120];
>+ float volatile farray[3120];
>+
>+ float sum = 0;
>+ for (int i = 0; i < 3120; i++)
>+ {
>+ array[i] = my_getchar();
>+ farray[i] = my_getchar() * 1.2;
>+ sum += array[i] + farray[i];
>+ }
>+ return sum;
>+}
>+
>+/*
>+**test2_step1_0_size:
>+** ...
>+** cm.push {ra, s0}, -64
>+** ...
>+** cm.popret {ra, s0}, 64
>+** ...
>+*/
>+int test2_step1_0_size()
>+{
>+ int volatile iarray[3120 + 1824/4 -8];
>+
>+ for (int i = 0; i < 3120 + 1824/4 - 8; i++)
>+ {
>+ iarray[i] = my_getchar() * 2;
>+ }
>+ return iarray[0] + iarray[1];
>+}
>+
>+/*
>+**test3:
>+** ...
>+** cm.push {ra, s0-s1}, -64
>+** ...
>+** cm.popret {ra, s0-s1}, 64
>+** ...
>+*/
>+float test3()
>+{
>+ char volatile array[3120];
>+ float volatile farray[3120];
>+
>+ float sum = 0, f1 = 0, f2 = 0, f3 = 0, f4 = 0, f5 = 0, f6 = 0, f7 = 0;
>+
>+ for (int i = 0; i < 3120; i++)
>+ {
>+ f1 = getf();
>+ f2 = getf();
>+ f3 = getf();
>+ f4 = getf();
>+ array[i] = my_getchar();
>+ farray[i] = my_getchar() * 1.2;
>+ sum += array[i] + farray[i] + f1 + f2 + f3 + f4;
>+ }
>+ return sum;
>+}
>+
>+/*
>+**outgoing_stack_args:
>+** ...
>+** cm.push {ra, s0}, -32
>+** ...
>+** cm.popret {ra, s0}, 32
>+** ...
>+*/
>+int outgoing_stack_args()
>+{
>+ int local = getint();
>+ return local +incoming_stack_args(0, 1, 2, 3, 4, 5, 6, 7, 8);
>+}
>+
>+/*
>+**callPrintInts:
>+** ...
>+** cm.push {ra}, -32
>+** ...
>+** cm.popret {ra}, 32
>+** ...
>+*/
>+float callPrintInts()
>+{
>+ volatile float f = getf(); // f in local
>+ PrintInts(9,1,2,3,4,5,6,7,8,9);
>+ return f;
>+}
>+
>+/*
>+**callPrint:
>+** ...
>+** cm.push {ra}, -32
>+** ...
>+** cm.popret {ra}, 32
>+** ...
>+*/
>+float callPrint()
>+{
>+ volatile float f = getf(); // f in local
>+ PrintIntsNoVaStart(0,1,2,3,4,5,6,7,8,9);
>+ return f;
>+}
>+
>+/*
>+**callPrint_S:
>+** ...
>+** cm.push {ra, s0}, -32
>+** ...
>+** cm.popret {ra, s0}, 32
>+** ...
>+*/
>+float callPrint_S()
>+{
>+ float f = getf();
>+ PrintIntsNoVaStart(0,1,2,3,4,5,6,7,8,9);
>+ return f;
>+}
>+
>+/*
>+**callPrint_2:
>+** ...
>+** cm.push {ra, s0}, -32
>+** ...
>+** cm.popret {ra, s0}, 32
>+** ...
>+*/
>+float callPrint_2()
>+{
>+ float f = getf();
>+ PrintInts2(0,1,2,3,4,5,6,7,8,9);
>+ return f;
>+}
>+
>+/*
>+**test_step1_0bytes_save_restore:
>+** ...
>+** cm.push {ra}, -16
>+** ...
>+** cm.popret {ra}, 16
>+** ...
>+*/
>+int test_step1_0bytes_save_restore()
>+{
>+
>+ int a = 9;
>+ int b = my_getchar();
>+ return a +b;
>+}
>+
>+/*
>+**test_s0:
>+** ...
>+** cm.push {ra, s0}, -16
>+** ...
>+** cm.popret {ra, s0}, 16
>+** ...
>+*/
>+int test_s0()
>+{
>+
>+ int a = my_getchar();
>+ int b = my_getchar();
>+ return a +b;
>+}
>+
>+/*
>+**test_s1:
>+** ...
>+** cm.push {ra, s0-s1}, -16
>+** ...
>+** cm.popret {ra, s0-s1}, 16
>+** ...
>+*/
>+int test_s1()
>+{
>+
>+ int s0 = my_getchar();
>+ int s1 = my_getchar();
>+ int b = my_getchar();
>+ return s1 +s0 +b;
>+}
>+
>+/*
>+**test_f0:
>+** ...
>+** cm.push {ra, s0-s1}, -16
>+** ...
>+** cm.popret {ra, s0-s1}, 16
>+** ...
>+*/
>+int test_f0()
>+{
>+
>+ int s0 = my_getchar();
>+ float f0 = getf();
>+ int b = my_getchar();
>+ return f0 +s0 +b;
>+}
>+
>+/*
>+**foo:
>+** cm.push {ra}, -16
>+** call f1
>+** cm.pop {ra}, 16
>+** tail f2
>+*/
>+void foo(void)
>+{
>+ f1();
>+ f2();
>+}
>diff --git a/gcc/testsuite/gcc.target/riscv/rv32i_zcmp.c 
>b/gcc/testsuite/gcc.target/riscv/rv32i_zcmp.c
>new file mode 100644
>index 00000000000..924197cb3c4
>--- /dev/null
>+++ b/gcc/testsuite/gcc.target/riscv/rv32i_zcmp.c
>@@ -0,0 +1,239 @@
>+/* { dg-do compile } */
>+/* { dg-options " -Os -march=rv32imaf_zca_zcmp -mabi=ilp32f -mcmodel=medlow" 
>} */
>+/* { dg-skip-if "" { *-*-* } {"-O0" "-O1" "-O2" "-Og" "-O3" "-Oz" "-flto"} } 
>*/
>+/* { dg-final { check-function-bodies "**" "" } } */
>+
>+char my_getchar();
>+float getf();
>+int __attribute__((noinline)) incoming_stack_args
>+ (int arg0, int arg1, int arg2, int arg3,
>+ int arg4, int arg5, int arg6, int arg7, int arg8);
>+int getint();
>+void PrintInts (int n, ...); // varargs
>+void __attribute__((noinline)) PrintIntsNoVaStart (int n, ...); // varargs
>+void PrintInts2 (int arg0, int arg1, int arg2, int arg3, int arg4, int arg5, 
>int n, ...);
>+extern void f1(void);
>+extern void f2(void);
>+
>+/*
>+**test1:
>+** ...
>+** cm.push {ra, s0-s4}, -80
>+** ...
>+** cm.popret {ra, s0-s4}, 80
>+** ...
>+*/
>+int test1()
>+{
>+ char volatile array[3120];
>+ float volatile farray[3120];
>+
>+ float sum = 0;
>+ for (int i = 0; i < 3120; i++)
>+ {
>+ array[i] = my_getchar();
>+ farray[i] = my_getchar() * 1.2;
>+ sum += array[i] + farray[i];
>+ }
>+ return sum;
>+}
>+
>+/*
>+**test2_step1_0_size:
>+** ...
>+** cm.push {ra, s0-s1}, -64
>+** ...
>+** cm.popret {ra, s0-s1}, 64
>+** ...
>+*/
>+int test2_step1_0_size()
>+{
>+ int volatile iarray[3120 + 1824/4 -8];
>+
>+ for (int i = 0; i < 3120 + 1824/4 - 8; i++)
>+ {
>+ iarray[i] = my_getchar() * 2;
>+ }
>+ return iarray[0] + iarray[1];
>+}
>+
>+/*
>+**test3:
>+** ...
>+** cm.push {ra, s0-s4}, -80
>+** ...
>+** cm.popret {ra, s0-s4}, 80
>+** ...
>+*/
>+float test3()
>+{
>+ char volatile array[3120];
>+ float volatile farray[3120];
>+
>+ float sum = 0, f1 = 0, f2 = 0, f3 = 0, f4 = 0, f5 = 0, f6 = 0, f7 = 0;
>+
>+ for (int i = 0; i < 3120; i++)
>+ {
>+ f1 = getf();
>+ f2 = getf();
>+ f3 = getf();
>+ f4 = getf();
>+ array[i] = my_getchar();
>+ farray[i] = my_getchar() * 1.2;
>+ sum += array[i] + farray[i] + f1 + f2 + f3 + f4;
>+ }
>+ return sum;
>+}
>+
>+/*
>+**outgoing_stack_args:
>+** ...
>+** cm.push {ra, s0}, -32
>+** ...
>+** cm.popret {ra, s0}, 32
>+** ...
>+*/
>+int outgoing_stack_args()
>+{
>+ int local = getint();
>+ return local +incoming_stack_args(0, 1, 2, 3, 4, 5, 6, 7, 8);
>+}
>+
>+/*
>+**callPrintInts:
>+** ...
>+** cm.push {ra}, -48
>+** ...
>+** cm.popret {ra}, 48
>+** ...
>+*/
>+float callPrintInts()
>+{
>+ volatile float f = getf(); // f in local
>+ PrintInts(9,1,2,3,4,5,6,7,8,9);
>+ return f;
>+}
>+
>+/*
>+**callPrint:
>+** ...
>+** cm.push {ra}, -48
>+** ...
>+** cm.popret {ra}, 48
>+** ...
>+*/
>+float callPrint()
>+{
>+ volatile float f = getf(); // f in local
>+ PrintIntsNoVaStart(0,1,2,3,4,5,6,7,8,9);
>+ return f;
>+}
>+
>+/*
>+**callPrint_S:
>+** ...
>+** cm.push {ra}, -48
>+** ...
>+** cm.popret {ra}, 48
>+** ...
>+*/
>+float callPrint_S()
>+{
>+ float f = getf();
>+ PrintIntsNoVaStart(0,1,2,3,4,5,6,7,8,9);
>+ return f;
>+}
>+
>+/*
>+**callPrint_2:
>+** ...
>+** cm.push {ra}, -48
>+** ...
>+** cm.popret {ra}, 48
>+** ...
>+*/
>+float callPrint_2()
>+{
>+ float f = getf();
>+ PrintInts2(0,1,2,3,4,5,6,7,8,9);
>+ return f;
>+}
>+
>+/*
>+**test_step1_0bytes_save_restore:
>+** ...
>+** cm.push {ra}, -16
>+** ...
>+** cm.popret {ra}, 16
>+** ...
>+*/
>+int test_step1_0bytes_save_restore()
>+{
>+
>+ int a = 9;
>+ int b = my_getchar();
>+ return a +b;
>+}
>+
>+/*
>+**test_s0:
>+** ...
>+** cm.push {ra, s0}, -16
>+** ...
>+** cm.popret {ra, s0}, 16
>+** ...
>+*/
>+int test_s0()
>+{
>+
>+ int a = my_getchar();
>+ int b = my_getchar();
>+ return a +b;
>+}
>+
>+/*
>+**test_s1:
>+** ...
>+** cm.push {ra, s0-s1}, -16
>+** ...
>+** cm.popret {ra, s0-s1}, 16
>+** ...
>+*/
>+int test_s1()
>+{
>+
>+ int s0 = my_getchar();
>+ int s1 = my_getchar();
>+ int b = my_getchar();
>+ return s1 +s0 +b;
>+}
>+
>+/*
>+**test_f0:
>+** ...
>+** cm.push {ra, s0}, -32
>+** ...
>+** cm.popret {ra, s0}, 32
>+** ...
>+*/
>+int test_f0()
>+{
>+
>+ int s0 = my_getchar();
>+ float f0 = getf();
>+ int b = my_getchar();
>+ return f0 +s0 +b;
>+}
>+
>+/*
>+**foo:
>+** cm.push {ra}, -16
>+** call f1
>+** cm.pop {ra}, 16
>+** tail f2
>+*/
>+void foo(void)
>+{
>+ f1();
>+ f2();
>+}
>diff --git a/gcc/testsuite/gcc.target/riscv/zcmp_stack_alignment.c 
>b/gcc/testsuite/gcc.target/riscv/zcmp_stack_alignment.c
>new file mode 100644
>index 00000000000..8e481522f89
>--- /dev/null
>+++ b/gcc/testsuite/gcc.target/riscv/zcmp_stack_alignment.c
>@@ -0,0 +1,23 @@
>+/* { dg-do compile } */
>+/* { dg-options " -O0 -march=rv32e_zca_zcb_zcmp -mabi=ilp32e -mcmodel=medlow 
>-fomit-frame-pointer" } */
>+/* { dg-skip-if "" { *-*-* } {"-O2" "-O1" "-Os" "-Og" "-O3" "-Oz" "-flto"} } 
>*/
>+/* { dg-final { check-function-bodies "**" "" } } */
>+
>+void bar();
>+
>+/*
>+**fool_rv32e:
>+** cm.push {ra}, -32
>+** ...
>+** call bar
>+** ...
>+** lw a5,32\(sp\)
>+** ...
>+** cm.popret {ra}, 32
>+*/
>+int fool_rv32e ( int a0, int a1, int a2, int a3, int a4, int a5,
>+ int incoming0)
>+{
>+ bar();
>+ return a0 + a1 + a2 + a3 + a4 + a5 + incoming0;
>+}
>\ No newline at end of file
>--
>2.17.1