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re PR tree-optimization/87117 (ICE in eliminate_dom_walker::eliminate_cleanup(bool) at gcc/gcc/tree-ssa-sccvn.c:5431 since r263875)

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2018-08-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/87117
	* tree-ssa-sccvn.c (fully_constant_vn_reference_p): Exclude
	void which is is_gimple_reg_type by checking for COMPLETE_TYPE_P.

	* gcc.dg/pr87117-1.c: New testcase.

From-SVN: r263911
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Richard Biener 2018-08-28 10:14:45 +00:00 committed by Richard Biener
parent 7b3ca24435
commit f2b0062c10
4 changed files with 33 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2018-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/87117
* tree-ssa-sccvn.c (fully_constant_vn_reference_p): Exclude
void which is is_gimple_reg_type by checking for COMPLETE_TYPE_P.
2018-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/87117

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2018-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/87117
* gcc.dg/pr87117-1.c: New testcase.
2018-08-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/87117

21
gcc/testsuite/gcc.dg/pr87117-1.c Normal file
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@ -0,0 +1,21 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fno-inline -fno-tree-dce" } */
int a, b, c;
long *d;
void fn1()
{
for (; 0 < a;)
a++;
}
void fn3()
{
for (; c; c++)
d[c] = 0;
}
void fn2()
{
if (b)
fn3();
fn1();
}

1
gcc/tree-ssa-sccvn.c
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@ -1408,6 +1408,7 @@ fully_constant_vn_reference_p (vn_reference_t ref)
/* Simplify reads from constants or constant initializers. */
else if (BITS_PER_UNIT == 8
&& COMPLETE_TYPE_P (ref->type)
&& is_gimple_reg_type (ref->type)
&& (!INTEGRAL_TYPE_P (ref->type)
|| TYPE_PRECISION (ref->type) % BITS_PER_UNIT == 0))