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| author | Jeff Law <law@redhat.com> | 2015-05-07 07:18:07 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2015-05-07 07:18:07 -0600 |
| commit | 48451e8f3c819d5f706596e32cf6d9b3cb600b5b (patch) | |
| tree | 5cc975e1ee19aa16d83a69b02b66bd72b50748e7 /gcc/gimple-match-head.c | |
| parent | 963ba1b266651a71ad1eee55607ea9ee34c1de7c (diff) | |
match.pd (bit_and (plus/minus (convert @0) (convert @1) mask): New simplifier to narrow arithmetic.
* match.pd (bit_and (plus/minus (convert @0) (convert @1) mask): New
simplifier to narrow arithmetic.
* generic-match-head.c: (types_match, single_use): New functions.
* gimple-match-head.c: (types_match, single_use): New functions.
* gcc.dg/tree-ssa/shorten-1.c: New test.
From-SVN: r222877
Diffstat (limited to 'gcc/gimple-match-head.c')
| -rw-r--r-- | gcc/gimple-match-head.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/gimple-match-head.c b/gcc/gimple-match-head.c index c7b2f957bac..7b9348b53ec 100644 --- a/gcc/gimple-match-head.c +++ b/gcc/gimple-match-head.c @@ -861,3 +861,21 @@ do_valueize (tree (*valueize)(tree), tree op) return op; } +/* Routine to determine if the types T1 and T2 are effectively + the same for GIMPLE. */ + +static inline bool +types_match (tree t1, tree t2) +{ + return types_compatible_p (t1, t2); +} + +/* Return if T has a single use. For GIMPLE, we also allow any + non-SSA_NAME (ie constants) and zero uses to cope with uses + that aren't linked up yet. */ + +static inline bool +single_use (tree t) +{ + return TREE_CODE (t) != SSA_NAME || has_zero_uses (t) || has_single_use (t); +} |