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re PR tree-optimization/53070 (ICE: in execute_cse_reciprocals, at tree-ssa-math-opts.c:513 with -O -ffast-math -ftree-loop-if-convert -fno-tree-loop-im)

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2012-04-23  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/53070
	* tree-if-conv.c (combine_blocks): Free predicates in all blocks.
	(main_tree_if_conversion): Verify we succeeded in that.

	* gcc.dg/torture/pr53070.c: New testcase.

From-SVN: r186704
This commit is contained in:
Richard Guenther 2012-04-23 12:47:02 +00:00 committed by Richard Biener
parent 9771644a91
commit c654217566
4 changed files with 28 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2012-04-23 Richard Guenther <rguenther@suse.de>
PR tree-optimization/53070
* tree-if-conv.c (combine_blocks): Free predicates in all blocks.
(main_tree_if_conversion): Verify we succeeded in that.
2012-04-23 Jan Hubicka <jh@suse.cz>
* lto-symtab.c (lto_cgraph_replace_node): Do not call

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-04-23 Richard Guenther <rguenther@suse.de>
PR tree-optimization/53070
* gcc.dg/torture/pr53070.c: New testcase.
2012-04-23 Richard Guenther <rguenther@suse.de>
PR c/53060

10
gcc/testsuite/gcc.dg/torture/pr53070.c Normal file
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@ -0,0 +1,10 @@
/* { dg-do compile } */
/* { dg-options "-ffast-math -ftree-loop-if-convert -fno-tree-loop-im" } */
int
foo (int c)
{
int t = 0, i = 0;
for (; i < 100; i++)
t += c ? c : 1;
return t;
}

8
gcc/tree-if-conv.c
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@ -1651,8 +1651,8 @@ combine_blocks (struct loop *loop)
free_bb_predicate (bb);
if (bb_with_exit_edge_p (loop, bb))
{
gcc_assert (exit_bb == NULL);
exit_bb = bb;
break;
}
}
gcc_assert (exit_bb != loop->latch);
@ -1779,6 +1779,7 @@ main_tree_if_conversion (void)
struct loop *loop;
bool changed = false;
unsigned todo = 0;
basic_block bb;
if (number_of_loops () <= 1)
return 0;
@ -1794,6 +1795,11 @@ main_tree_if_conversion (void)
free_dominance_info (CDI_POST_DOMINATORS);
#ifdef ENABLE_CHECKING
FOR_EACH_BB (bb)
gcc_assert (!bb->aux);
#endif
return todo;
}