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re PR tree-optimization/46498 (ICE: in eliminate_unnecessary_stmts, at tree-ssa-dce.c:1112 with -O -funsafe-math-optimizations -fno-tree-dominator-opts -fno-tree-reassoc)

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2010-11-16  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/46498
	* tree-ssa-dce.c (perform_tree_ssa_dce): Compute dominator info.

From-SVN: r166861
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Richard Guenther 2010-11-17 10:43:21 +00:00 committed by Richard Biener
parent d92826beb4
commit 5ac60b564f
2 changed files with 7 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2010-11-17 Richard Guenther <rguenther@suse.de>
PR tree-optimization/46498
* tree-ssa-dce.c (perform_tree_ssa_dce): Compute dominator info.
2010-11-16 Nathan Froyd <froydnj@codesourcery.com>
* config/xtensa/xtensa.c (function_arg_boundary): Really rename to...

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gcc/tree-ssa-dce.c
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@ -1408,6 +1408,8 @@ perform_tree_ssa_dce (bool aggressive)
struct edge_list *el = NULL;
bool something_changed = 0;
calculate_dominance_info (CDI_DOMINATORS);
/* Preheaders are needed for SCEV to work.
Simple lateches and recorded exits improve chances that loop will
proved to be finite in testcases such as in loop-15.c and loop-24.c */