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| author | Jakub Jelinek <jakub@redhat.com> | 2022-03-15 10:24:22 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2022-03-15 10:24:22 +0100 |
| commit | da24fce323eaf088239e0f900dd23f6b05d552c1 (patch) | |
| tree | 78bf9a35b7b819168f1bfa11f3b2d9935dda0a95 | |
| parent | 49fb0af9bf8f16907980d383c2bbc85e185ec2e0 (diff) | |
| download | gcc-da24fce323eaf088239e0f900dd23f6b05d552c1.zip gcc-da24fce323eaf088239e0f900dd23f6b05d552c1.tar.gz gcc-da24fce323eaf088239e0f900dd23f6b05d552c1.tar.bz2 | |
i386: Use no-mmx,no-sse for LIBGCC2_UNWIND_ATTRIBUTE [PR104890]
Regardless of the outcome of the general-regs-only stuff in x86gprintrin.h,
apparently general-regs-only is much bigger hammer than no-sse, and e.g.
using 387 instructions in the unwinder isn't a big deal, it never needs
to realign the stack because of it.
So, the following patch uses no-sse (and adds no-mmx to it, even when not
strictly needed).
2022-03-15 Jakub Jelinek <jakub@redhat.com>
PR target/104890
* config/i386/i386.h (LIBGCC2_UNWIND_ATTRIBUTE): Use no-mmx,no-sse
instead of general-regs-only.
| -rw-r--r-- | gcc/config/i386/i386.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h index 0d28e57..37b523c 100644 --- a/gcc/config/i386/i386.h +++ b/gcc/config/i386/i386.h @@ -2848,10 +2848,10 @@ extern enum attr_cpu ix86_schedule; #define NUM_X86_64_MS_CLOBBERED_REGS 12 #endif -/* __builtin_eh_return can't handle stack realignment, so restrict to - general regs in 32-bit libgcc functions that call it. */ +/* __builtin_eh_return can't handle stack realignment, so disable MMX/SSE + in 32-bit libgcc functions that call it. */ #ifndef __x86_64__ -#define LIBGCC2_UNWIND_ATTRIBUTE __attribute__((target ("general-regs-only"))) +#define LIBGCC2_UNWIND_ATTRIBUTE __attribute__((target ("no-mmx,no-sse"))) #endif /* |