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| author | mrs <mrs@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-04-02 19:51:52 +0000 |
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| committer | mrs <mrs@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-04-02 19:51:52 +0000 |
| commit | aa7e537c6a038e81382606468e484576c2cee3d5 (patch) | |
| tree | 149b47cc2c398d20f882c4307d0f320170375137 /gcc/tree-ssa-math-opts.c | |
| parent | 7f646368a7a7679a8c4a349c4130b49d9a64d9cd (diff) | |
| parent | b28b448fdb7865fc64094a799dd396f0d732a7c2 (diff) | |
| download | gcc-aa7e537c6a038e81382606468e484576c2cee3d5.tar.gz | |
Merge in trunk.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/wide-int@209030 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-math-opts.c')
| -rw-r--r-- | gcc/tree-ssa-math-opts.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/tree-ssa-math-opts.c b/gcc/tree-ssa-math-opts.c index aea8f386dca..27db5244d96 100644 --- a/gcc/tree-ssa-math-opts.c +++ b/gcc/tree-ssa-math-opts.c @@ -1801,7 +1801,9 @@ find_bswap_1 (gimple stmt, struct symbolic_number *n, int limit) if (rhs_class == GIMPLE_BINARY_RHS) { + int i; struct symbolic_number n1, n2; + unsigned HOST_WIDEST_INT mask; tree source_expr2; if (code != BIT_IOR_EXPR) @@ -1827,6 +1829,15 @@ find_bswap_1 (gimple stmt, struct symbolic_number *n, int limit) return NULL_TREE; n->size = n1.size; + for (i = 0, mask = 0xff; i < n->size; i++, mask <<= BITS_PER_UNIT) + { + unsigned HOST_WIDEST_INT masked1, masked2; + + masked1 = n1.n & mask; + masked2 = n2.n & mask; + if (masked1 && masked2 && masked1 != masked2) + return NULL_TREE; + } n->n = n1.n | n2.n; if (!verify_symbolic_number_p (n, stmt)) |