https://gcc.gnu.org/g:713299077407bd1472e14fa10a8d4565932da8da
commit r16-3495-g713299077407bd1472e14fa10a8d4565932da8da
Author: Yoshinori Sato <yoshinori.s...@nifty.com>
Date: Mon Sep 1 11:12:17 2025 -0600
PR target/89828 Inernal compiler error on "-fno-omit-frame-pointer"
The problem was caused by an erroneous note about creating a stack frame,
which caused the cur_cfa reg to fail to assert with a value other than
the frame pointer.
This fix will generate notes that correctly update cur_cfa.
v2 changes.
Add testcase.
All tests that failed with
"internal compiler error: in dwarf2out_frame_debug_adjust_cfa, at
dwarf2cfi.cc"
now pass.
PR target/89828
gcc
* config/rx/rx.cc (add_pop_cfi_notes): Release the frame pointer if
it is
used.
(rx_expand_prologue): Redesigned stack pointer and frame pointer
update
process.
gcc/testsuite/
* gcc.dg/pr89828.c: New.
Diff:
---
gcc/config/rx/rx.cc | 49 +++++++++++++++---------------------------
gcc/testsuite/gcc.dg/pr89828.c | 49 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+), 32 deletions(-)
diff --git a/gcc/config/rx/rx.cc b/gcc/config/rx/rx.cc
index dd730dca3c01..c5638817d08c 100644
--- a/gcc/config/rx/rx.cc
+++ b/gcc/config/rx/rx.cc
@@ -1648,16 +1648,20 @@ mark_frame_related (rtx insn)
static void
add_pop_cfi_notes (rtx_insn *insn, unsigned int high, unsigned int low)
{
- rtx t = plus_constant (Pmode, stack_pointer_rtx,
- (high - low + 1) * UNITS_PER_WORD);
+ rtx src = stack_pointer_rtx;
+ rtx t;
+ for (unsigned int i = low; i <= high; i++)
+ {
+ add_reg_note (insn, REG_CFA_RESTORE, gen_rtx_REG (word_mode, i));
+ if (i == FRAME_POINTER_REGNUM && frame_pointer_needed)
+ src = frame_pointer_rtx;
+ }
+ t = plus_constant (Pmode, src, (high - low + 1) * UNITS_PER_WORD);
t = gen_rtx_SET (stack_pointer_rtx, t);
add_reg_note (insn, REG_CFA_ADJUST_CFA, t);
RTX_FRAME_RELATED_P (insn) = 1;
- for (unsigned int i = low; i <= high; i++)
- add_reg_note (insn, REG_CFA_RESTORE, gen_rtx_REG (word_mode, i));
}
-
static bool
ok_for_max_constant (HOST_WIDE_INT val)
{
@@ -1816,36 +1820,17 @@ rx_expand_prologue (void)
}
}
- /* If needed, set up the frame pointer. */
- if (frame_pointer_needed)
- gen_safe_add (frame_pointer_rtx, stack_pointer_rtx,
- GEN_INT (- (HOST_WIDE_INT) frame_size), true);
-
- /* Allocate space for the outgoing args.
- If the stack frame has not already been set up then handle this as well.
*/
- if (stack_size)
+ if (stack_size || frame_size)
{
- if (frame_size)
- {
- if (frame_pointer_needed)
- gen_safe_add (stack_pointer_rtx, frame_pointer_rtx,
- GEN_INT (- (HOST_WIDE_INT) stack_size), true);
- else
- gen_safe_add (stack_pointer_rtx, stack_pointer_rtx,
- GEN_INT (- (HOST_WIDE_INT) (frame_size + stack_size)),
- true);
- }
- else
- gen_safe_add (stack_pointer_rtx, stack_pointer_rtx,
- GEN_INT (- (HOST_WIDE_INT) stack_size), true);
+ gen_safe_add (stack_pointer_rtx, stack_pointer_rtx,
+ GEN_INT (- (HOST_WIDE_INT) (stack_size + frame_size)),
+ true);
}
- else if (frame_size)
+ if (frame_pointer_needed)
{
- if (! frame_pointer_needed)
- gen_safe_add (stack_pointer_rtx, stack_pointer_rtx,
- GEN_INT (- (HOST_WIDE_INT) frame_size), true);
- else
- gen_safe_add (stack_pointer_rtx, frame_pointer_rtx, NULL_RTX, true);
+ gen_safe_add (frame_pointer_rtx, stack_pointer_rtx,
+ GEN_INT ((HOST_WIDE_INT) stack_size),
+ true);
}
}
diff --git a/gcc/testsuite/gcc.dg/pr89828.c b/gcc/testsuite/gcc.dg/pr89828.c
new file mode 100644
index 000000000000..d41fbae4cfab
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr89828.c
@@ -0,0 +1,49 @@
+/* { dg-do compile { target rx-*-* } } */
+/* { dg-options "-O2 -g -fno-omit-frame-pointer" } */
+struct baz;
+struct foo {
+ struct baz *c;
+ unsigned int flags;
+};
+struct bar {
+ const struct bar *b;
+ void (*func)(struct foo *a, struct baz *c, int flags);
+};
+struct baz {
+ int flag;
+ const struct bar *b;
+};
+static inline
+__attribute__((always_inline))
+__attribute__((no_instrument_function)) void inline1(struct foo *a)
+{
+ a->flags |= 1;
+}
+static inline
+__attribute__((always_inline))
+__attribute__((no_instrument_function)) int inline2(struct baz *c)
+{
+ return c->flag == 1;
+}
+extern const struct bar _bar;
+extern void func(struct foo *a);
+void pr89828(struct foo *a, struct baz *c, int flags)
+{
+ const struct bar *b;
+
+ if (c->b == a->c->b) {
+ a->c->b->func(a, c, flags);
+ } else {
+ for (b = (&_bar); b; b = b->b) {
+ if (b == a->c->b)
+ break;
+ if (b == c->b) {
+ func(a);
+ break;
+ }
+ }
+ }
+
+ if (inline2(a->c))
+ inline1(a);
+}
