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re PR tree-optimization/53986 (missing vrp on bit-mask test, LSHIFT_EXPR not handled)

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2012-09-07  Tom de Vries  <tom@codesourcery.com>

	PR tree-optimization/53986
	* gcc.dg/tree-ssa/vrp80.c: New test.
	* gcc.dg/tree-ssa/vrp80-2.c: Same.

From-SVN: r191058
This commit is contained in:
Tom de Vries 2012-09-07 09:21:21 +00:00 committed by Tom de Vries
parent 25722436a6
commit 4d9df7c441
3 changed files with 77 additions and 0 deletions
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6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2012-09-07 Tom de Vries <tom@codesourcery.com>
PR tree-optimization/53986
* gcc.dg/tree-ssa/vrp80.c: New test.
* gcc.dg/tree-ssa/vrp80-2.c: Same.
2012-09-06 Jason Merrill <jason@redhat.com>
PR c++/54341

38
gcc/testsuite/gcc.dg/tree-ssa/vrp80-2.c Normal file
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/* { dg-do compile } */
/* { dg-options "-O2 -fno-tree-switch-conversion -fdump-tree-vrp1" } */
extern void vrp_keep (void);
/* Test <<. */
void
f3 (int s, int b)
{
if (s >> 3 == -2)
/* s in range [-16, -9]. */
{
s += 17;
/* s in range [1, 8]. */
b = (b & 1) + 1;
/* b in range [1, 2]. */
b = b << s;
/* b in range [bmin << smin, bmax << smax],
== [1 << 1, 2 << 8]
== [2, 512]. */
if (b == 2)
vrp_keep ();
if (b == 512)
vrp_keep ();
}
}
int
main ()
{
return 0;
}
/* { dg-final { scan-tree-dump-times "vrp_keep \\(" 2 "vrp1"} } */
/* { dg-final { cleanup-tree-dump "vrp1" } } */

33
gcc/testsuite/gcc.dg/tree-ssa/vrp80.c Normal file
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/* { dg-do link } */
/* { dg-options "-O2 -fno-tree-switch-conversion" } */
extern void link_error (void);
/* Test <<. */
void
f3 (int s, int b)
{
if (s >> 3 == -2)
/* s in range [-16, -9]. */
{
s += 17;
/* s in range [1, 8]. */
b = (b & 1) + 1;
/* b in range [1, 2]. */
b = b << s;
/* b in range [bmin << smin, bmax << smax],
== [1 << 1, 2 << 8]
== [2, 512]. */
if (b == 1 || b == 513)
link_error ();
}
}
int
main ()
{
return 0;
}