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| author | Maciej W. Rozycki <macro@orcam.me.uk> | 2025-01-12 16:48:53 +0000 |
|---|---|---|
| committer | Maciej W. Rozycki <macro@orcam.me.uk> | 2025-01-12 16:48:53 +0000 |
| commit | 46861167f548ec622918d95acd2424b64f56797d (patch) | |
| tree | a7f5a87e76d9002873bdcb69755fe6fd19ea26de /gcc | |
| parent | 40754a3b9bef83bf4da0675fcb378e8cd1675602 (diff) | |
| download | gcc-46861167f548ec622918d95acd2424b64f56797d.zip gcc-46861167f548ec622918d95acd2424b64f56797d.tar.gz gcc-46861167f548ec622918d95acd2424b64f56797d.tar.bz2 | |
Alpha: Add memory clobbers to `builtin_longjmp' expansion
Add the same memory clobbers to `builtin_longjmp' for Alpha as with
commit 41439bf6a647 ("builtins.c (expand_builtin_longjmp): Added two
memory clobbers."), to prevent instructions that access memory via the
frame or stack pointer from being moved across the write to the frame
pointer.
gcc/
* config/alpha/alpha.md (builtin_longjmp): Add memory clobbers.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/alpha/alpha.md | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/config/alpha/alpha.md b/gcc/config/alpha/alpha.md index 376c4cb..35c8030 100644 --- a/gcc/config/alpha/alpha.md +++ b/gcc/config/alpha/alpha.md @@ -5005,6 +5005,8 @@ rtx pv = gen_rtx_REG (Pmode, 27); /* This bit is the same as expand_builtin_longjmp. */ + emit_clobber (gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (VOIDmode))); + emit_clobber (gen_rtx_MEM (BLKmode, hard_frame_pointer_rtx)); emit_move_insn (hard_frame_pointer_rtx, fp); emit_move_insn (pv, lab); emit_stack_restore (SAVE_NONLOCAL, stack); |