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| author | Richard Biener <rguenther@suse.de> | 2014-01-30 18:28:19 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2014-01-30 18:28:19 +0000 |
| commit | c965e18748995d2ce9a13395152fd0da295da573 (patch) | |
| tree | d57bbbc4b9b65da04a915f26455cd3254ace9c7e /gcc/tree-ssa-forwprop.c | |
| parent | 5f71f3d3e0a2170cfb25d86bf7bae3803f180c74 (diff) | |
| download | gcc-c965e18748995d2ce9a13395152fd0da295da573.zip gcc-c965e18748995d2ce9a13395152fd0da295da573.tar.gz gcc-c965e18748995d2ce9a13395152fd0da295da573.tar.bz2 | |
re PR middle-end/59993 (ICE: SSA corruption)
2014-01-30 Richard Biener <rguenther@suse.de>
PR tree-optimization/59993
* tree-ssa-forwprop.c (associate_pointerplus): Check we
can propagate form the earlier stmt and avoid the transform
when the intermediate result is needed.
* gcc.dg/torture/pr59993.c: New testcase.
From-SVN: r207316
Diffstat (limited to 'gcc/tree-ssa-forwprop.c')
| -rw-r--r-- | gcc/tree-ssa-forwprop.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/tree-ssa-forwprop.c b/gcc/tree-ssa-forwprop.c index ebdd8f5..b229429 100644 --- a/gcc/tree-ssa-forwprop.c +++ b/gcc/tree-ssa-forwprop.c @@ -2926,11 +2926,13 @@ associate_pointerplus (gimple_stmt_iterator *gsi) /* Associate (p +p off1) +p off2 as (p +p (off1 + off2)). */ ptr = gimple_assign_rhs1 (stmt); off1 = gimple_assign_rhs2 (stmt); - if (TREE_CODE (ptr) != SSA_NAME) + if (TREE_CODE (ptr) != SSA_NAME + || !has_single_use (ptr)) return false; def_stmt = SSA_NAME_DEF_STMT (ptr); if (!is_gimple_assign (def_stmt) - || gimple_assign_rhs_code (def_stmt) != POINTER_PLUS_EXPR) + || gimple_assign_rhs_code (def_stmt) != POINTER_PLUS_EXPR + || !can_propagate_from (def_stmt)) return false; ptr = gimple_assign_rhs1 (def_stmt); off2 = gimple_assign_rhs2 (def_stmt); |