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| author | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-03-16 11:36:30 +0000 |
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| committer | rguenth <rguenth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-03-16 11:36:30 +0000 |
| commit | c701e5d534f0545c870353637d565cca5dc19cbe (patch) | |
| tree | 8f1870e0ed7b128c09f885498dd35f51103bff22 /gcc/tree-ssa-ccp.c | |
| parent | e55c858550770fbcd8b9cb202615d546552310e3 (diff) | |
| download | gcc-c701e5d534f0545c870353637d565cca5dc19cbe.tar.gz | |
2011-03-16 Richard Guenther <rguenther@suse.de>
* gimple-fold.c (maybe_fold_reference): Open-code relevant
constant folding. Move MEM_REF canonicalization first.
Rely on fold_const_aggregate_ref for initializer folding.
* tree-ssa-ccp.c (ccp_fold): Handle constant vector extracts.
* gcc.dg/tree-ssa/pr14814.c: Adjust.
* gcc.dg/tree-ssa/ssa-ccp-19.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@171043 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-ccp.c')
| -rw-r--r-- | gcc/tree-ssa-ccp.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c index 8b8d996f508..4fc4316bb1c 100644 --- a/gcc/tree-ssa-ccp.c +++ b/gcc/tree-ssa-ccp.c @@ -1182,6 +1182,17 @@ ccp_fold (gimple stmt) TREE_CODE (rhs), TREE_TYPE (rhs), val); } + else if (TREE_CODE (rhs) == BIT_FIELD_REF + && TREE_CODE (TREE_OPERAND (rhs, 0)) == SSA_NAME) + { + tree val = get_constant_value (TREE_OPERAND (rhs, 0)); + if (val) + return fold_ternary_loc (EXPR_LOCATION (rhs), + TREE_CODE (rhs), + TREE_TYPE (rhs), val, + TREE_OPERAND (rhs, 1), + TREE_OPERAND (rhs, 2)); + } else if (TREE_CODE (rhs) == MEM_REF && TREE_CODE (TREE_OPERAND (rhs, 0)) == SSA_NAME) { |