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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) 

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> 2010-11-16 Nathan Froyd <froydnj@codesourcery.com>
* config/xtensa/xtensa.c (function_arg_boundary): Really rename to... * config/xtensa/xtensa.c (function_arg_boundary): Really rename to...

2
gcc/tree-ssa-dce.c
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@ -1408,6 +1408,8 @@ perform_tree_ssa_dce (bool aggressive)
struct edge_list *el = NULL; struct edge_list *el = NULL;
bool something_changed = 0; bool something_changed = 0;
calculate_dominance_info (CDI_DOMINATORS);
/* Preheaders are needed for SCEV to work. /* Preheaders are needed for SCEV to work.
Simple lateches and recorded exits improve chances that loop will 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 */ proved to be finite in testcases such as in loop-15.c and loop-24.c */