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Set the isTied flags when building INLINEASM MachineInstrs.

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For normal instructions, isTied() is set automatically by addOperand(),
based on MCInstrDesc, but inline asm has tied operands outside the
descriptor.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@162869 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2012-08-29 22:02:00 +00:00
parent b1b97833ae
commit 66390805ad
1 changed files with 21 additions and 4 deletions
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25
lib/CodeGen/SelectionDAG/InstrEmitter.cpp
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@ -893,19 +893,23 @@ EmitSpecialNode(SDNode *Node, bool IsClone, bool IsCloned,
getZExtValue();
MI->addOperand(MachineOperand::CreateImm(ExtraInfo));
// Remember to operand index of the group flags.
SmallVector<unsigned, 8> GroupIdx;
// Add all of the operand registers to the instruction.
for (unsigned i = InlineAsm::Op_FirstOperand; i != NumOps;) {
unsigned Flags =
cast<ConstantSDNode>(Node->getOperand(i))->getZExtValue();
unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
const unsigned NumVals = InlineAsm::getNumOperandRegisters(Flags);
GroupIdx.push_back(MI->getNumOperands());
MI->addOperand(MachineOperand::CreateImm(Flags));
++i; // Skip the ID value.
switch (InlineAsm::getKind(Flags)) {
default: llvm_unreachable("Bad flags!");
case InlineAsm::Kind_RegDef:
for (; NumVals; --NumVals, ++i) {
for (unsigned j = 0; j != NumVals; ++j, ++i) {
unsigned Reg = cast<RegisterSDNode>(Node->getOperand(i))->getReg();
// FIXME: Add dead flags for physical and virtual registers defined.
// For now, mark physical register defs as implicit to help fast
@ -916,7 +920,7 @@ EmitSpecialNode(SDNode *Node, bool IsClone, bool IsCloned,
break;
case InlineAsm::Kind_RegDefEarlyClobber:
case InlineAsm::Kind_Clobber:
for (; NumVals; --NumVals, ++i) {
for (unsigned j = 0; j != NumVals; ++j, ++i) {
unsigned Reg = cast<RegisterSDNode>(Node->getOperand(i))->getReg();
MI->addOperand(MachineOperand::CreateReg(Reg, /*isDef=*/ true,
/*isImp=*/ TargetRegisterInfo::isPhysicalRegister(Reg),
@ -931,9 +935,22 @@ EmitSpecialNode(SDNode *Node, bool IsClone, bool IsCloned,
case InlineAsm::Kind_Mem: // Addressing mode.
// The addressing mode has been selected, just add all of the
// operands to the machine instruction.
for (; NumVals; --NumVals, ++i)
for (unsigned j = 0; j != NumVals; ++j, ++i)
AddOperand(MI, Node->getOperand(i), 0, 0, VRBaseMap,
/*IsDebug=*/false, IsClone, IsCloned);
// Manually set isTied bits.
if (InlineAsm::getKind(Flags) == InlineAsm::Kind_RegUse) {
unsigned DefGroup = 0;
if (InlineAsm::isUseOperandTiedToDef(Flags, DefGroup)) {
unsigned DefIdx = GroupIdx[DefGroup] + 1;
unsigned UseIdx = GroupIdx.back() + 1;
for (unsigned j = 0; j != NumVals; ++j) {
MI->getOperand(DefIdx + j).setIsTied();
MI->getOperand(UseIdx + j).setIsTied();
}
}
}
break;
}
}