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PR target/78748: S/390: Fix ICE with ANDC splitter.

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gcc/ChangeLog:

2016-12-19  Dominik Vogt  <vogt@linux.vnet.ibm.com>

	PR target/78748
	* config/s390/s390.md ("*andc_split_<mode>"): Allow memory destination
	only if it coincides with operand 2.

gcc/testsuite/ChangeLog:

2016-12-19  Dominik Vogt  <vogt@linux.vnet.ibm.com>

	PR target/78748
	* gcc.c-torture/compile/pr78748.c: New test.

From-SVN: r243793
This commit is contained in:
Dominik Vogt 2016-12-19 09:53:56 +00:00 committed by Andreas Krebbel
parent e01f223f28
commit ad7ab32ed4
4 changed files with 30 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-12-19 Dominik Vogt <vogt@linux.vnet.ibm.com>
PR target/78748
* config/s390/s390.md ("*andc_split_<mode>"): Allow memory destination
only if it coincides with operand 2.
2016-12-19 Dominik Vogt <vogt@linux.vnet.ibm.com>
* combine.c (change_zero_ext): Skip generation of redundant AND.

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gcc/config/s390/s390.md
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@ -7420,7 +7420,11 @@
(and:GPR (not:GPR (match_operand:GPR 1 "nonimmediate_operand" ""))
(match_operand:GPR 2 "general_operand" "")))
(clobber (reg:CC CC_REGNUM))]
"! reload_completed && s390_logical_operator_ok_p (operands)"
"! reload_completed
&& (GET_CODE (operands[0]) != MEM
/* Ensure that s390_logical_operator_ok_p will succeed even
on the split xor if (b & a) is stored into a pseudo. */
|| rtx_equal_p (operands[0], operands[2]))"
"#"
"&& 1"
[

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gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-12-19 Dominik Vogt <vogt@linux.vnet.ibm.com>
PR target/78748
* gcc.c-torture/compile/pr78748.c: New test.
2016-12-18 Janus Weil <janus@gcc.gnu.org>
PR fortran/78848

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gcc/testsuite/gcc.c-torture/compile/pr78748.c Normal file
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/* PR target/78748 */
/* { dg-options "-march=zEC12" { target { s390*-*-* } } } */
void
foo (int *p, int *q)
{
*q = *p & ~*q;
}
void
bar (int *p, int *q)
{
*q = ~*p & *q;
}