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| author | LIU Hao <lh_mouse@126.com> | 2025-04-27 18:18:34 +0800 |
|---|---|---|
| committer | Jonathan Yong <10walls@gmail.com> | 2025-04-28 00:48:33 +0000 |
| commit | dea7b9a78b11b5ca0c85b971521144ba07a66aca (patch) | |
| tree | 78ff27470374ab42471147f29f46a2186071e674 /gcc | |
| parent | 346c62c60b88fa6ff123bfc6159f61e865ac8750 (diff) | |
| download | gcc-dea7b9a78b11b5ca0c85b971521144ba07a66aca.zip gcc-dea7b9a78b11b5ca0c85b971521144ba07a66aca.tar.gz gcc-dea7b9a78b11b5ca0c85b971521144ba07a66aca.tar.bz2 | |
gcc: For Windows x86-32, always attempt to realign stack regardless of SSE
For Windows x86-32 targets, the Microsoft ABI only guarantees that the stack
is aligned to 4-byte boundaries. GCC knows about the default alignment of the
stack. However, before this commit, it did not realign the stack unless SSE
was also enabled.
When a stricter (larger) alignment is requested, it's always necessary to
realign the stack, as what Solaris does.
Reference: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111107#c14
Signed-off-by: LIU Hao <lh_mouse@126.com>
Signed-off-by: Jonathan Yong <10walls@gmail.com>
gcc/ChangeLog:
PR target/111107
* config/i386/cygming.h (STACK_REALIGN_DEFAULT): Copy from sol2.h.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/cygming.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/config/i386/cygming.h b/gcc/config/i386/cygming.h index 3ddcbec..d587d25 100644 --- a/gcc/config/i386/cygming.h +++ b/gcc/config/i386/cygming.h @@ -36,7 +36,7 @@ along with GCC; see the file COPYING3. If not see /* 32-bit Windows aligns the stack on a 4-byte boundary but SSE instructions may require 16-byte alignment. */ #undef STACK_REALIGN_DEFAULT -#define STACK_REALIGN_DEFAULT TARGET_SSE +#define STACK_REALIGN_DEFAULT (TARGET_64BIT ? 0 : 1) /* Support hooks for SEH. */ #undef TARGET_ASM_UNWIND_EMIT |