On 10/3/24 9:30 AM, Yangyu Chen wrote:
Currently, we lack support for TARGET_CAN_INLINE_P on the RISC-V
ISA. As a result, certain functions cannot be optimized with inlining
when specific options, such as __attribute__((target("arch=+v"))) .
This can lead to potential performance issues when building
retargetable binaries for RISC-V.
To address this, I have implemented the riscv_can_inline_p function.
This addition enables inlining when the callee either has no special
options or when the some options match, and also ensuring that the
callee's ISA is a subset of the caller's. I also check some other
options when there is no always_inline set.
gcc/ChangeLog:
* common/config/riscv/riscv-common.cc (cl_opt_var_ref_t): Add
cl_opt_var_ref_t pointer to member of cl_target_option.
(struct riscv_ext_flag_table_t): Add new cl_opt_var_ref_t field.
(RISCV_EXT_FLAG_ENTRY): New macro to simplify the definition of
riscv_ext_flag_table.
(riscv_ext_is_subset): New function to check if the callee's ISA
is a subset of the caller's.
(riscv_x_target_flags_isa_mask): New function to get the mask of
ISA extension in x_target_flags of gcc_options.
* config/riscv/riscv-subset.h (riscv_ext_is_subset): Declare
riscv_ext_is_subset function.
(riscv_x_target_flags_isa_mask): Declare
riscv_x_target_flags_isa_mask function.
* config/riscv/riscv.cc (riscv_can_inline_p): New function.
(TARGET_CAN_INLINE_P): Implement TARGET_CAN_INLINE_P.
Thanks. I've pushed this to the trunk.
jeff
