[gcc r12-7654] i386: Use no-mmx, no-sse for LIBGCC2_UNWIND_ATTRIBUTE [PR104890]

[gcc r12-7654] i386: Use no-mmx, no-sse for LIBGCC2_UNWIND_ATTRIBUTE [PR104890]

[Jakub Jelinek]

https://gcc.gnu.org/g:da24fce323eaf088239e0f900dd23f6b05d552c1

commit r12-7654-gda24fce323eaf088239e0f900dd23f6b05d552c1
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Tue Mar 15 10:24:22 2022 +0100

    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.

Diff:
---
 gcc/config/i386/i386.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/gcc/config/i386/i386.h b/gcc/config/i386/i386.h
index 0d28e57f8f2..37b523cea4f 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
 
 /*