diff options
| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-11-27 15:00:37 +0000 |
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| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2007-11-27 15:00:37 +0000 |
| commit | 9481f629582b23ee6714e4843c21b721e0a6dc91 (patch) | |
| tree | cc1f0441b801657e05c602bbd03a41eaade69aec /gcc/tree-ssa-forwprop.c | |
| parent | aeaacbf3a7da89011425b99003a6db333f48adf9 (diff) | |
| download | gcc-9481f629582b23ee6714e4843c21b721e0a6dc91.tar.gz | |
2007-11-27 Richard Guenther <rguenther@suse.de>
PR tree-optimization/34241
* tree-ssa-forwprop.c (forward_propagate_addr_expr): Make sure
to only delete real conversion chains.
* g++.dg/torture/pr34241.C: New testcase.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@130468 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-forwprop.c')
| -rw-r--r-- | gcc/tree-ssa-forwprop.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c index 3e30454ab9f..f368c3321c4 100644 --- a/gcc/tree-ssa-forwprop.c +++ b/gcc/tree-ssa-forwprop.c @@ -685,6 +685,7 @@ forward_propagate_addr_expr (tree name, tree rhs) FOR_EACH_IMM_USE_STMT (use_stmt, iter, name) { bool result; + tree use_rhs; /* If the use is not in a simple assignment statement, then there is nothing we can do. */ @@ -712,11 +713,13 @@ forward_propagate_addr_expr (tree name, tree rhs) pop_stmt_changes (&use_stmt); /* Remove intermediate now unused copy and conversion chains. */ + use_rhs = GIMPLE_STMT_OPERAND (use_stmt, 1); if (result && TREE_CODE (GIMPLE_STMT_OPERAND (use_stmt, 0)) == SSA_NAME - && (TREE_CODE (GIMPLE_STMT_OPERAND (use_stmt, 1)) == SSA_NAME - || TREE_CODE (GIMPLE_STMT_OPERAND (use_stmt, 1)) == NOP_EXPR - || TREE_CODE (GIMPLE_STMT_OPERAND (use_stmt, 1)) == CONVERT_EXPR)) + && (TREE_CODE (use_rhs) == SSA_NAME + || ((TREE_CODE (use_rhs) == NOP_EXPR + || TREE_CODE (use_rhs) == CONVERT_EXPR) + && TREE_CODE (TREE_OPERAND (use_rhs, 0)) == SSA_NAME))) { block_stmt_iterator bsi = bsi_for_stmt (use_stmt); release_defs (use_stmt); |