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| author | Marc Glisse <marc.glisse@inria.fr> | 2013-05-13 11:30:50 +0200 |
|---|---|---|
| committer | Marc Glisse <glisse@gcc.gnu.org> | 2013-05-13 09:30:50 +0000 |
| commit | 640bfeb25ce9b2f645c75d1e04ecce9ad74c4be1 (patch) | |
| tree | ed915c07d5e51d4f597a85fe3b3ee5781b72abfd /gcc/fold-const.c | |
| parent | 198fe1bfebf81e2a13b223bedcb41ed34d426862 (diff) | |
| download | gcc-640bfeb25ce9b2f645c75d1e04ecce9ad74c4be1.zip gcc-640bfeb25ce9b2f645c75d1e04ecce9ad74c4be1.tar.gz gcc-640bfeb25ce9b2f645c75d1e04ecce9ad74c4be1.tar.bz2 | |
tree-vect-generic.c (uniform_vector_p): Move ...
2013-05-13 Marc Glisse <marc.glisse@inria.fr>
gcc/
* tree-vect-generic.c (uniform_vector_p): Move ...
* tree.c (uniform_vector_p): ... here.
* tree.h (uniform_vector_p): Declare it.
* fold-const.c (fold_binary_loc) <shift>: Turn the second argument
into a scalar.
gcc/testsuite/
* gcc.dg/vector-shift-2.c: New testcase.
From-SVN: r198819
Diffstat (limited to 'gcc/fold-const.c')
| -rw-r--r-- | gcc/fold-const.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index bfe9e07..cbd3445 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -12409,6 +12409,12 @@ fold_binary_loc (location_t loc, if (integer_zerop (arg0)) return omit_one_operand_loc (loc, type, arg0, arg1); + /* Prefer vector1 << scalar to vector1 << vector2 + if vector2 is uniform. */ + if (VECTOR_TYPE_P (TREE_TYPE (arg1)) + && (tem = uniform_vector_p (arg1)) != NULL_TREE) + return fold_build2_loc (loc, code, type, op0, tem); + /* Since negative shift count is not well-defined, don't try to compute it in the compiler. */ if (TREE_CODE (arg1) == INTEGER_CST && tree_int_cst_sgn (arg1) < 0) |