diff options
Diffstat (limited to 'lib/Target/X86/X86ISelDAGToDAG.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelDAGToDAG.cpp | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp index 0ca063b..9697f25 100644 --- a/lib/Target/X86/X86ISelDAGToDAG.cpp +++ b/lib/Target/X86/X86ISelDAGToDAG.cpp @@ -92,6 +92,10 @@ namespace { /// register should set this to true. bool ContainsFPCode; + /// FastISel - Enable fast(er) instruction selection. + /// + bool FastISel; + /// X86Lowering - This object fully describes how to lower LLVM code to an /// X86-specific SelectionDAG. X86TargetLowering X86Lowering; @@ -103,8 +107,9 @@ namespace { unsigned GlobalBaseReg; public: - X86DAGToDAGISel(X86TargetMachine &TM) + X86DAGToDAGISel(X86TargetMachine &TM, bool fast) : SelectionDAGISel(X86Lowering), + ContainsFPCode(false), FastISel(fast), X86Lowering(*TM.getTargetLowering()), Subtarget(&TM.getSubtarget<X86Subtarget>()) {} @@ -237,7 +242,7 @@ bool X86DAGToDAGISel::CanBeFoldedBy(SDNode *N, SDNode *U) { // / [X] // | ^ // [U]--------| - return !isNonImmUse(U, N); + return !FastISel && !isNonImmUse(U, N); } /// MoveBelowTokenFactor - Replace TokenFactor operand with load's chain operand @@ -370,7 +375,7 @@ void X86DAGToDAGISel::InstructionSelectBasicBlock(SelectionDAG &DAG) { DEBUG(BB->dump()); MachineFunction::iterator FirstMBB = BB; - if (X86ISelPreproc) + if (!FastISel) InstructionSelectPreprocess(DAG); // Codegen the basic block. @@ -1071,6 +1076,6 @@ SelectInlineAsmMemoryOperand(const SDOperand &Op, char ConstraintCode, /// createX86ISelDag - This pass converts a legalized DAG into a /// X86-specific DAG, ready for instruction scheduling. /// -FunctionPass *llvm::createX86ISelDag(X86TargetMachine &TM) { - return new X86DAGToDAGISel(TM); +FunctionPass *llvm::createX86ISelDag(X86TargetMachine &TM, bool Fast) { + return new X86DAGToDAGISel(TM, Fast); } |