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re PR target/79179 (PowerPC64: -mcpu=power9 creates stxsd with bad offset) 

[gcc]
2017-01-25  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/79179
	* config/rs6000/vsx.md (vsx_extract_<mode>_store): Use wY
	constraint instead of o for the stxsd instruction.

[gcc/testsuite]
2017-01-25  Michael Meissner  <meissner@linux.vnet.ibm.com>

	PR target/79179
	* gcc.target/powerpc/pr79179.c: New test.

From-SVN: r244917
This commit is contained in:
Michael Meissner 2017-01-26 04:16:11 +00:00 committed by Michael Meissner
parent 3b5de3cb71
commit b5aa1281e1
4 changed files with 35 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-01-25 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79179
* config/rs6000/vsx.md (vsx_extract_<mode>_store): Use wY
constraint instead of o for the stxsd instruction.
2017-01-25 Carl Love <cel@us.ibm.com>
* config/rs6000/rs6000-c (altivec_overloaded_builtins): Fix order

2
gcc/config/rs6000/vsx.md
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@ -2323,7 +2323,7 @@
;; Optimize storing a single scalar element that is the right location to
;; memory
(define_insn "*vsx_extract_<mode>_store"
[(set (match_operand:<VS_scalar> 0 "memory_operand" "=m,Z,o")
[(set (match_operand:<VS_scalar> 0 "memory_operand" "=m,Z,wY")
(vec_select:<VS_scalar>
(match_operand:VSX_D 1 "register_operand" "d,wv,wb")
(parallel [(match_operand:QI 2 "vsx_scalar_64bit" "wD,wD,wD")])))]

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2017-01-25 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/79179
* gcc.target/powerpc/pr79179.c: New test.
2017-01-25 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* gcc.target/powerpc/vsx-elemrev-4.c: Change expected code

23
gcc/testsuite/gcc.target/powerpc/pr79179.c Normal file
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@ -0,0 +1,23 @@
/* { dg-do assemble { target { powerpc*-*-* && lp64 } } } */
/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power9" } } */
/* { dg-require-effective-target powerpc_p9vector_ok } */
/* { dg-options "-mcpu=power9 -O3" } */
/* Compile with -O3 -mcpu=power9. It originally generated
stxsd 12,1(9)
which is illegal. */
#pragma pack(1)
struct {
signed : 1;
unsigned long a;
} b;
void c(void)
{
b.a = 0;
for (; b.a <= 45; b.a = (long)b.a + 1)
;
}