diff options
| author | 2016-01-11 13:43:31 +0000 | |
|---|---|---|
| committer | 2016-02-25 16:26:13 +0000 | |
| commit | 9ff0d205fd60cba6753a91f613b198ca2d67f04d (patch) | |
| tree | 86689672064d66d2c473045f934f948211ba0389 /compiler/optimizing/nodes.h | |
| parent | 950d063395c7cecbbe372fd607468018d661a35c (diff) | |
Optimizing: ARM64 negated bitwise operations simplification
Use negated instructions on ARM64 to replace [bitwise operation + not]
patterns, that is:
a & ~b (BIC)
a | ~b (ORN)
a ^ ~b (EON)
The simplification only happens if the Not is only used by the bitwise
operation. It does not happen if both inputs are Not's (this should be
handled by a generic simplification applying De Morgan's laws).
Change-Id: I0e112b23fd8b8e10f09bfeff5994508a8ff96e9c
Diffstat (limited to 'compiler/optimizing/nodes.h')
| -rw-r--r-- | compiler/optimizing/nodes.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/optimizing/nodes.h b/compiler/optimizing/nodes.h index 4185b2f2c5..c4764ccbb4 100644 --- a/compiler/optimizing/nodes.h +++ b/compiler/optimizing/nodes.h @@ -1268,6 +1268,7 @@ class HLoopInformationOutwardIterator : public ValueObject { #define FOR_EACH_CONCRETE_INSTRUCTION_ARM64(M) #else #define FOR_EACH_CONCRETE_INSTRUCTION_ARM64(M) \ + M(Arm64BitwiseNegatedRight, Instruction) \ M(Arm64DataProcWithShifterOp, Instruction) \ M(Arm64IntermediateAddress, Instruction) #endif |