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re PR tree-optimization/47061 (VRP doesn't propagate through x<<=1, but it does for x*=2)

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2012-06-29  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/47061
	* gcc.dg/tree-ssa/vrp71.c: New testcase.

From-SVN: r189076
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Richard Guenther 2012-06-29 14:27:24 +00:00 • committed by Richard Biener
parent 76744c1746
commit 7211c82f34
2 changed files with 27 additions and 0 deletions
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gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-06-29 Richard Guenther <rguenther@suse.de>
PR tree-optimization/47061
* gcc.dg/tree-ssa/vrp71.c: New testcase.
2012-06-29 Richard Guenther <rguenther@suse.de>
PR tree-optimization/37541

22
gcc/testsuite/gcc.dg/tree-ssa/vrp71.c Normal file
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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-vrp1" } */
int foo(int *p)
{
int x = -10;
if (p[0]) x++;
if (p[1]) x++;
if (p[2]) x++;
if (p[3]) x++;
x <<= 2;
return (x > 0);
}
int bar(char c)
{
int i = c << 1;
return i > 1000;
}
/* { dg-final { scan-tree-dump-times "return 0;" 2 "vrp1" } } */
/* { dg-final { cleanup-tree-dump "vrp1" } } */