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rs6000.c (rtx_is_swappable_p): Change UNSPEC_VSX__XXSPLTD to require special splat handling. 

[gcc]

2017-01-16  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (rtx_is_swappable_p): Change
	UNSPEC_VSX__XXSPLTD to require special splat handling.

[gcc/testsuite]

2017-01-16  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* gcc.target/powerpc/swaps-p8-27.c: New.

From-SVN: r244495
This commit is contained in:
Bill Schmidt 2017-01-16 15:05:35 +00:00 committed by William Schmidt
parent 436afa16af
commit 290687fb4e
4 changed files with 46 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2017-01-16 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* config/rs6000/rs6000.c (rtx_is_swappable_p): Change
UNSPEC_VSX__XXSPLTD to require special splat handling.
2017-01-16 David Malcolm <dmalcolm@redhat.com>
PR bootstrap/78616

1
gcc/config/rs6000/rs6000.c
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@ -41318,6 +41318,7 @@ rtx_is_swappable_p (rtx op, unsigned int *special)
case UNSPEC_VSX_VEC_INIT:
return 0;
case UNSPEC_VSPLT_DIRECT:
case UNSPEC_VSX_XXSPLTD:
*special = SH_SPLAT;
return 1;
case UNSPEC_REDUC_PLUS:

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2017-01-16 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* gcc.target/powerpc/swaps-p8-27.c: New.
2017-01-16 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/71737

36
gcc/testsuite/gcc.target/powerpc/swaps-p8-27.c Normal file
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@ -0,0 +1,36 @@
/* { dg-do compile { target { powerpc64le-*-* } } } */
/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
/* { dg-options "-mcpu=power8 -O3 " } */
/* { dg-final { scan-assembler-times "lxvd2x" 2 } } */
/* { dg-final { scan-assembler-times "stxvd2x" 1 } } */
/* { dg-final { scan-assembler-times "xxpermdi" 3 } } */
/* Verify that swap optimization works correctly for a VSX direct splat.
The three xxpermdi's that are generated correspond to two splats
and the __builtin_vsx_xxpermdi. */
int printf (const char *__restrict __format, ...);
typedef double __m128d __attribute__ ((__vector_size__ (16), __may_alias__));
double s1[] = {2134.3343, 6678.346};
double s2[] = {41124.234, 6678.346};
long long dd[] = {1, 2}, d[2];
union{long long l[2]; double d[2];} e;
void
foo ()
{
__m128d source1, source2, dest;
__m128d a, b, c;
e.d[1] = s1[1];
e.l[0] = !__builtin_isunordered(s1[0], s2[0])
&& s1[0] == s2[0] ? -1 : 0;
source1 = __builtin_vec_vsx_ld (0, s1);
source2 = __builtin_vec_vsx_ld (0, s2);
a = __builtin_vec_splat (source1, 0);
b = __builtin_vec_splat (source2, 0);
c = (__m128d)__builtin_vec_cmpeq (a, b);
dest = __builtin_vsx_xxpermdi (source1, c, 1);
*(__m128d *)d = dest;
}