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| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-01-15 09:31:28 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-01-15 09:31:28 +0000 |
| commit | 2d788f29f88b72f050f51d25f816db95ad9ace33 (patch) | |
| tree | fd8e90b5557638e064987b6da3dd91ca61186bc0 /gcc/tree-vect-loop.c | |
| parent | 14144bb9f07bb9f1c5834d3eb70e4f0c2bb5b4b7 (diff) | |
| download | gcc-2d788f29f88b72f050f51d25f816db95ad9ace33.tar.gz | |
PR tree-optimization/55955
* tree-vect-loop.c (vectorizable_reduction): Give up early on
*SHIFT_EXPR and *ROTATE_EXPR codes.
* gcc.c-torture/compile/pr55955.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@195190 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 3a470e3c99c..d4f6bc72451 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -4776,6 +4776,17 @@ vectorizable_reduction (gimple stmt, gimple_stmt_iterator *gsi, { /* 4. Supportable by target? */ + if (code == LSHIFT_EXPR || code == RSHIFT_EXPR + || code == LROTATE_EXPR || code == RROTATE_EXPR) + { + /* Shifts and rotates are only supported by vectorizable_shifts, + not vectorizable_reduction. */ + if (dump_enabled_p ()) + dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location, + "unsupported shift or rotation."); + return false; + } + /* 4.1. check support for the operation in the loop */ optab = optab_for_tree_code (code, vectype_in, optab_default); if (!optab) |