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[PATCH] PR63676, exit tree fold when node be TREE_CLOBBER_P

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gcc/
    PR tree-optimization/63676
    * gimple-fold.c (fold_gimple_assign): Do not fold node when
    TREE_CLOBBER_P be true.

From-SVN: r217215
This commit is contained in:
Jiong Wang 2014-11-07 11:08:30 +00:00
parent ad6f996c03
commit 8c00ba08c6
2 changed files with 10 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,10 @@
2014-11-07 Jiong Wang <jiong.wang@arm.com>
2014-11-07 Richard Biener <rguenther@suse.de>
PR tree-optimization/63676
* gimple-fold.c (fold_gimple_assign): Do not fold node when
TREE_CLOBBER_P be true.
2014-11-07 Richard Biener <rguenther@suse.de>
PR middle-end/63770

3
gcc/gimple-fold.c
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@ -320,6 +320,9 @@ fold_gimple_assign (gimple_stmt_iterator *si)
{
tree rhs = gimple_assign_rhs1 (stmt);
if (TREE_CLOBBER_P (rhs))
return NULL_TREE;
if (REFERENCE_CLASS_P (rhs))
return maybe_fold_reference (rhs, false);