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| author | Ira Rosen <irar@il.ibm.com> | 2010-11-04 11:51:09 +0000 |
|---|---|---|
| committer | Ira Rosen <irar@gcc.gnu.org> | 2010-11-04 11:51:09 +0000 |
| commit | 0532869d0595b5ae8a45a6ca9eceab25fa8b2958 (patch) | |
| tree | e375ba076793adb2ad4aee99238ae93f7d3f40bf /gcc/tree-vect-loop.c | |
| parent | e4d8d4ea194dd8a360a3e21474296807984fc833 (diff) | |
| download | gcc-0532869d0595b5ae8a45a6ca9eceab25fa8b2958.zip gcc-0532869d0595b5ae8a45a6ca9eceab25fa8b2958.tar.gz gcc-0532869d0595b5ae8a45a6ca9eceab25fa8b2958.tar.bz2 | |
re PR tree-optimization/46213 (gfortran.dg/aliasing_array_result_1.f90 ICE: in vectorizable_reduction, at tree-vect-loop.c:4046 with custom compiler flags)
PR tree-optimization/46213
* tree-vect-loop.c (vect_is_simple_reduction_1): Handle
MINUS_EXPR only if the first operand is reduction operand.
From-SVN: r166306
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 57ca5a8..bc87965 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -1800,7 +1800,11 @@ vect_is_simple_reduction_1 (loop_vec_info loop_info, gimple phi, simply rewriting this into "res += -x[i]". Avoid changing gimple instruction for the first simple tests and only do this if we're allowed to change code at all. */ - if (code == MINUS_EXPR && modify) + if (code == MINUS_EXPR + && modify + && (op1 = gimple_assign_rhs1 (def_stmt)) + && TREE_CODE (op1) == SSA_NAME + && SSA_NAME_DEF_STMT (op1) == phi) code = PLUS_EXPR; if (check_reduction |