diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-09 20:05:00 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2010-06-09 20:05:00 +0000 |
| commit | 3013a2068421335304dce861dd5977e8cf43cbca (patch) | |
| tree | 7c7ef544309a815feb4ab77f00e9ef9ac5fa33bb /lib/CodeGen/SelectionDAG/InstrEmitter.cpp | |
| parent | 68fc2daf8fa446be04d2ed2b3cbb1b00c382458f (diff) | |
| download | external_llvm-3013a2068421335304dce861dd5977e8cf43cbca.tar.gz external_llvm-3013a2068421335304dce861dd5977e8cf43cbca.tar.bz2 external_llvm-3013a2068421335304dce861dd5977e8cf43cbca.zip | |
Mark physregs defined by inline asm as implicit.
This is a bit of a hack to make inline asm look more like call instructions.
It would be better to produce correct dead flags during isel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105749 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/InstrEmitter.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/InstrEmitter.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp index 1febdb511c..1c53dbd1b2 100644 --- a/lib/CodeGen/SelectionDAG/InstrEmitter.cpp +++ b/lib/CodeGen/SelectionDAG/InstrEmitter.cpp @@ -821,14 +821,18 @@ EmitSpecialNode(SDNode *Node, bool IsClone, bool IsCloned, case InlineAsm::Kind_RegDef: for (; NumVals; --NumVals, ++i) { unsigned Reg = cast<RegisterSDNode>(Node->getOperand(i))->getReg(); - MI->addOperand(MachineOperand::CreateReg(Reg, true)); + // FIXME: Add dead flags for physical and virtual registers defined. + // For now, mark physical register defs as implicit to help fast + // regalloc. This makes inline asm look a lot like calls. + MI->addOperand(MachineOperand::CreateReg(Reg, true, + /*isImp=*/ TargetRegisterInfo::isPhysicalRegister(Reg))); } break; case InlineAsm::Kind_RegDefEarlyClobber: for (; NumVals; --NumVals, ++i) { unsigned Reg = cast<RegisterSDNode>(Node->getOperand(i))->getReg(); MI->addOperand(MachineOperand::CreateReg(Reg, /*isDef=*/ true, - /*isImp=*/ false, + /*isImp=*/ TargetRegisterInfo::isPhysicalRegister(Reg), /*isKill=*/ false, /*isDead=*/ false, /*isUndef=*/false, |