diff options
Diffstat (limited to 'lib/Target/X86')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 14 | ||||
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.h | 15 |
2 files changed, 18 insertions, 11 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index adaa986ffc..3e0a21063f 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -2035,19 +2035,23 @@ const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const { } } -bool X86TargetLowering::isMaskedValueZeroForTargetNode(const SDOperand &Op, - uint64_t Mask) const { +void X86TargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op, + uint64_t Mask, + uint64_t &KnownZero, + uint64_t &KnownOne, + unsigned Depth) const { unsigned Opc = Op.getOpcode(); + KnownZero = KnownOne = 0; // Don't know anything. switch (Opc) { default: assert(Opc >= ISD::BUILTIN_OP_END && "Expected a target specific node"); break; - case X86ISD::SETCC: return (Mask & 1) == 0; + case X86ISD::SETCC: + KnownZero |= (MVT::getIntVTBitMask(Op.getValueType()) ^ 1ULL); + break; } - - return false; } std::vector<unsigned> X86TargetLowering:: diff --git a/lib/Target/X86/X86ISelLowering.h b/lib/Target/X86/X86ISelLowering.h index 88d8e6ca3f..dc1a13c79f 100644 --- a/lib/Target/X86/X86ISelLowering.h +++ b/lib/Target/X86/X86ISelLowering.h @@ -218,12 +218,15 @@ namespace llvm { /// DAG node. virtual const char *getTargetNodeName(unsigned Opcode) const; - /// isMaskedValueZeroForTargetNode - Return true if 'Op & Mask' is known to - /// be zero. Op is expected to be a target specific node. Used by DAG - /// combiner. - virtual bool isMaskedValueZeroForTargetNode(const SDOperand &Op, - uint64_t Mask) const; - + /// computeMaskedBitsForTargetNode - Determine which of the bits specified + /// in Mask are known to be either zero or one and return them in the + /// KnownZero/KnownOne bitsets. + virtual void computeMaskedBitsForTargetNode(const SDOperand Op, + uint64_t Mask, + uint64_t &KnownZero, + uint64_t &KnownOne, + unsigned Depth = 0) const; + SDOperand getReturnAddressFrameIndex(SelectionDAG &DAG); std::vector<unsigned> |