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re PR target/78695 (ICE (segfault) on powerpc64le-linux-gnu)

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[gcc]

2016-12-11  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/78695
	* config/rs6000/rs6000.c (find_alignment_op): Discard from
	consideration any artificial definition.

[gcc/testsuite]

2016-12-11  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/78695
	* gcc.target/powerpc/swaps-stack-protector.c: New test.

From-SVN: r243534
This commit is contained in:
Bill Schmidt 2016-12-11 23:37:17 +00:00 committed by William Schmidt
parent 74edc8a9b9
commit 3113e92dc3
4 changed files with 33 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2016-12-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/78695
* config/rs6000/rs6000.c (find_alignment_op): Discard from
consideration any artificial definition.
2016-12-11 Iain Sandoe <iain@codesourcery.com>
* configure.ac (CROSS directory tests): Remove the assumption that

6
gcc/config/rs6000/rs6000.c
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@ -41433,6 +41433,12 @@ find_alignment_op (rtx_insn *insn, rtx base_reg)
if (!base_def_link || base_def_link->next)
break;
/* With stack-protector code enabled, and possibly in other
circumstances, there may not be an associated insn for
the def. */
if (DF_REF_IS_ARTIFICIAL (base_def_link->ref))
break;
rtx_insn *and_insn = DF_REF_INSN (base_def_link->ref);
and_operation = alignment_mask (and_insn);
if (and_operation != 0)

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2016-12-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/78695
* gcc.target/powerpc/swaps-stack-protector.c: New test.
2016-12-11 Uros Bizjak <ubizjak@gmail.com>
PR target/70799

16
gcc/testsuite/gcc.target/powerpc/swaps-stack-protector.c Normal file
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@ -0,0 +1,16 @@
/* { dg-do compile } */
/* { dg-options "-fstack-protector -O3" } */
/* PR78695: This code used to ICE in rs6000.c:find_alignment_op because
the stack protector address definition isn't associated with an insn. */
void *a();
long b() {
char c[1];
char *d = a(), *e = c;
long f = e ? b(e) : 0;
if (f > 54)
f = 1;
while (f--)
*d++ = *e++;
}