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| author | Ben Cheng <bccheng@google.com> | 2013-08-05 15:18:29 -0700 |
|---|---|---|
| committer | Ben Cheng <bccheng@google.com> | 2013-08-05 16:03:48 -0700 |
| commit | 32fce3edda831e36ee484406c39dffbe0230f257 (patch) | |
| tree | 733b1b5398304b260a4ee3d5d9b17da5038c5486 /gcc-4.8/gcc/tree-ssa-sink.c | |
| parent | e85b9ca2afe8edbb9fa99c6ce2cc4e52dce18c21 (diff) | |
| download | toolchain_gcc-32fce3edda831e36ee484406c39dffbe0230f257.tar.gz toolchain_gcc-32fce3edda831e36ee484406c39dffbe0230f257.tar.bz2 toolchain_gcc-32fce3edda831e36ee484406c39dffbe0230f257.zip | |
[4.8] Merge GCC 4.8.1
Change-Id: Ic8a60b7563f5172440fd40788605163a0cca6e30
Diffstat (limited to 'gcc-4.8/gcc/tree-ssa-sink.c')
| -rw-r--r-- | gcc-4.8/gcc/tree-ssa-sink.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc-4.8/gcc/tree-ssa-sink.c b/gcc-4.8/gcc/tree-ssa-sink.c index 48dae0b9f..9f091748e 100644 --- a/gcc-4.8/gcc/tree-ssa-sink.c +++ b/gcc-4.8/gcc/tree-ssa-sink.c @@ -335,7 +335,15 @@ statement_sink_location (gimple stmt, basic_block frombb, && gimple_vdef (use_stmt) && operand_equal_p (gimple_assign_lhs (stmt), gimple_assign_lhs (use_stmt), 0)) - continue; + { + /* If use_stmt is or might be a nop assignment then USE_STMT + acts as a use as well as definition. */ + if (stmt != use_stmt + && ref_maybe_used_by_stmt_p (use_stmt, + gimple_assign_lhs (stmt))) + return false; + continue; + } if (gimple_code (use_stmt) != GIMPLE_PHI) return false; |