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[multiple changes]

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2007-08-03  Andrew Pinski  <andrew_pinski@playstation.sony.com>
	    Diego Novillo  <dnovillo@google.com>

	PR 31521
	* tree-vrp.c (simplify_div_or_mod_using_ranges): Also simplify
	if the range includes 0.

2007-08-03  Diego Novillo  <dnovillo@google.com>

	PR 31521
	* gcc.dg/tree-ssa/pr31521.c: New test.

From-SVN: r127180
This commit is contained in:
Diego Novillo 2007-08-03 09:08:29 -04:00
parent 5e56953d9a
commit 737b089116
4 changed files with 33 additions and 1 deletions
gcc
ChangeLog
testsuite
ChangeLog
gcc.dg/tree-ssa
pr31521.c
tree-vrp.c

7
gcc/ChangeLog

@ -1,3 +1,10 @@
2007-08-03 Andrew Pinski <andrew_pinski@playstation.sony.com>
Diego Novillo <dnovillo@google.com>
PR 31521
* tree-vrp.c (simplify_div_or_mod_using_ranges): Also simplify
if the range includes 0.
2007-08-03 Ben Elliston <bje@au.ibm.com>
* config/spu/spu.md (dftsv, dftsv_celledp): Attach the appropriate

5
gcc/testsuite/ChangeLog

@ -1,3 +1,8 @@
2007-08-03 Diego Novillo <dnovillo@google.com>
PR 31521
* gcc.dg/tree-ssa/pr31521.c: New test.
2007-08-03 Thomas Koenig <tkoenig@gcc.gnu.org>
PR fortran/32770

20
gcc/testsuite/gcc.dg/tree-ssa/pr31521.c Normal file

@ -0,0 +1,20 @@
/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-vrp1" } */
void fail(void) __attribute__((noreturn));
int bar(int);
int foo(int x) {
int i;
int s = 0;
if (x <= 0) fail();
for (i = 0; i < x; ++i) {
/* This division by 4 should be replaced with >> 2. */
s += bar(i/4);
}
return s;
}
/* { dg-final { scan-tree-dump-times " = i_.* >> 2" 1 "vrp1" } } */
/* { dg-final { cleanup-tree-dump "vrp1" } } */

2
gcc/tree-vrp.c

@ -5541,7 +5541,7 @@ simplify_div_or_mod_using_ranges (tree stmt, tree rhs, enum tree_code rhs_code)
{
bool sop = false;
val = compare_range_with_value (GT_EXPR, vr, integer_zero_node, &sop);
val = compare_range_with_value (GE_EXPR, vr, integer_zero_node, &sop);
if (val
&& sop