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re PR target/13685 (Building simple test application with -march=pentium3 -Os gives SIGSEGV (unaligned sse instruction))

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PR target/13685
        * config/i386/i386.c (override_options): Use 128-bit
        stack boundary if -msse.

From-SVN: r116775
This commit is contained in:
Jason Merrill 2006-09-07 20:28:30 -04:00 committed by Jason Merrill
parent 2e71a7a31e
commit d0655f33aa
3 changed files with 48 additions and 16 deletions
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6
gcc/ChangeLog
View File

@ -1,3 +1,9 @@
2006-09-07 Jason Merrill <jason@redhat.com>
PR target/13685
* config/i386/i386.c (override_options): Use 128-bit
stack boundary if -msse.
2006-09-07 Eric Christopher <echristo@apple.com>
* config/darwin.h (MACHO_SYMBOL_FLAG_VARIABLE): Update

32
gcc/config/i386/i386.c
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@ -1799,22 +1799,6 @@ override_options (void)
align_functions = processor_target_table[ix86_tune].align_func;
}
/* Validate -mpreferred-stack-boundary= value, or provide default.
The default of 128 bits is for Pentium III's SSE __m128, but we
don't want additional code to keep the stack aligned when
optimizing for code size. */
ix86_preferred_stack_boundary = ((TARGET_64BIT || TARGET_MACHO || !optimize_size)
? 128 : 32);
if (ix86_preferred_stack_boundary_string)
{
i = atoi (ix86_preferred_stack_boundary_string);
if (i < (TARGET_64BIT ? 4 : 2) || i > 12)
error ("-mpreferred-stack-boundary=%d is not between %d and 12", i,
TARGET_64BIT ? 4 : 2);
else
ix86_preferred_stack_boundary = (1 << i) * BITS_PER_UNIT;
}
/* Validate -mbranch-cost= value, or provide default. */
ix86_branch_cost = ix86_cost->branch_cost;
if (ix86_branch_cost_string)
@ -1909,6 +1893,22 @@ override_options (void)
target_flags |= MASK_NO_RED_ZONE;
}
/* Validate -mpreferred-stack-boundary= value, or provide default.
The default of 128 bits is for Pentium III's SSE __m128, but we
don't want additional code to keep the stack aligned when
optimizing for code size. */
ix86_preferred_stack_boundary
= ((TARGET_MACHO || TARGET_SSE || !optimize_size) ? 128 : 32);
if (ix86_preferred_stack_boundary_string)
{
i = atoi (ix86_preferred_stack_boundary_string);
if (i < (TARGET_64BIT ? 4 : 2) || i > 12)
error ("-mpreferred-stack-boundary=%d is not between %d and 12", i,
TARGET_64BIT ? 4 : 2);
else
ix86_preferred_stack_boundary = (1 << i) * BITS_PER_UNIT;
}
/* Accept -msseregparm only if at least SSE support is enabled. */
if (TARGET_SSEREGPARM
&& ! TARGET_SSE)

26
gcc/testsuite/gcc.target/i386/sse-20.c Normal file
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@ -0,0 +1,26 @@
/* PR target/13685 */
/* { dg-options "-Os -msse" } */
typedef float __m128 __attribute__ ((vector_size (16)));
typedef int __m64 __attribute__ ((vector_size (8)));
int puts (const char *s);
void foo (__m128 *, __m64 *, int);
int main (void)
{
foo (0, 0, 0);
return 0;
}
void foo (__m128 *dst, __m64 *src, int n)
{
__m128 xmm0 = { 0 };
while (n > 64)
{
puts ("");
xmm0 = __builtin_ia32_cvtpi2ps (xmm0, *src);
*dst = xmm0;
n --;
}
}