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| author | Rong Xu <xur@google.com> | 2014-09-02 15:29:57 -0700 |
|---|---|---|
| committer | Rong Xu <xur@google.com> | 2014-09-02 15:29:57 -0700 |
| commit | e97c99f15937e5762a973b25192aab824126a6d3 (patch) | |
| tree | 7f0be3ff7c7d976af06887dc50accd68f7630a7f /gcc-4.9/gcc/tree-ssa-math-opts.c | |
| parent | f1c18afafc2b321465ae6b07ede127095942d7dc (diff) | |
| download | toolchain_gcc-e97c99f15937e5762a973b25192aab824126a6d3.tar.gz toolchain_gcc-e97c99f15937e5762a973b25192aab824126a6d3.tar.bz2 toolchain_gcc-e97c99f15937e5762a973b25192aab824126a6d3.zip | |
[gcc-4.9] Merge svn r214745 from google/gcc-4_9 branch.
Merge gcc-4_9 source r214745 from google/gcc-4_9 branch.
Change-Id: Ie6fa0fd72f4b4eec3adc4db4bb922e652d1c2605
Diffstat (limited to 'gcc-4.9/gcc/tree-ssa-math-opts.c')
| -rw-r--r-- | gcc-4.9/gcc/tree-ssa-math-opts.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc-4.9/gcc/tree-ssa-math-opts.c b/gcc-4.9/gcc/tree-ssa-math-opts.c index 292ced1d0..0e8d54d34 100644 --- a/gcc-4.9/gcc/tree-ssa-math-opts.c +++ b/gcc-4.9/gcc/tree-ssa-math-opts.c @@ -1749,6 +1749,8 @@ find_bswap_1 (gimple stmt, struct symbolic_number *n, int limit) size = TYPE_PRECISION (n->type); if (size % BITS_PER_UNIT != 0) return NULL_TREE; + if (size > HOST_BITS_PER_WIDEST_INT) + return NULL_TREE; size /= BITS_PER_UNIT; n->n = (sizeof (HOST_WIDEST_INT) < 8 ? 0 : (unsigned HOST_WIDEST_INT)0x08070605 << 32 | 0x04030201); @@ -1792,6 +1794,8 @@ find_bswap_1 (gimple stmt, struct symbolic_number *n, int limit) type_size = TYPE_PRECISION (type); if (type_size % BITS_PER_UNIT != 0) return NULL_TREE; + if (type_size > (int) HOST_BITS_PER_WIDEST_INT) + return NULL_TREE; /* Sign extension: result is dependent on the value. */ old_type_size = TYPE_PRECISION (n->type); @@ -1932,7 +1936,7 @@ execute_optimize_bswap (void) bool changed = false; tree bswap16_type = NULL_TREE, bswap32_type = NULL_TREE, bswap64_type = NULL_TREE; - if (BITS_PER_UNIT != 8) + if (BITS_PER_UNIT != 8 || CHAR_BIT != 8) return 0; if (sizeof (HOST_WIDEST_INT) < 8) |