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[inline asm] Get the mayLoad/mayStore directly from the MIOp_ExtraInfo operand. 

llvm-svn: 167050
This commit is contained in:
Chad Rosier 2012-10-30 20:39:19 +00:00
parent 08f34ac9dd
commit 909f6a035f
2 changed files with 15 additions and 13 deletions
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18
llvm/include/llvm/CodeGen/MachineInstr.h
View File

@ -58,10 +58,8 @@ public:
NoFlags = 0,
FrameSetup = 1 << 0, // Instruction is used as a part of
// function frame setup code.
InsideBundle = 1 << 1, // Instruction is inside a bundle (not
InsideBundle = 1 << 1 // Instruction is inside a bundle (not
// the first MI in a bundle)
MayLoad = 1 << 2, // Instruction could possibly read memory.
MayStore = 1 << 3 // Instruction could possibly modify memory.
};
private:
const MCInstrDesc *MCID; // Instruction descriptor.
@ -447,7 +445,12 @@ public:
/// Instructions with this flag set are not necessarily simple load
/// instructions, they may load a value and modify it, for example.
bool mayLoad(QueryType Type = AnyInBundle) const {
return hasProperty(MCID::MayLoad, Type) || (Flags & MayLoad);
if (isInlineAsm()) {
unsigned ExtraInfo = getOperand(InlineAsm::MIOp_ExtraInfo).getImm();
if (ExtraInfo & InlineAsm::Extra_MayLoad)
return true;
}
return hasProperty(MCID::MayLoad, Type);
}
@ -456,7 +459,12 @@ public:
/// instructions, they may store a modified value based on their operands, or
/// may not actually modify anything, for example.
bool mayStore(QueryType Type = AnyInBundle) const {
return hasProperty(MCID::MayStore, Type) || (Flags & MayStore);
if (isInlineAsm()) {
unsigned ExtraInfo = getOperand(InlineAsm::MIOp_ExtraInfo).getImm();
if (ExtraInfo & InlineAsm::Extra_MayStore)
return true;
}
return hasProperty(MCID::MayStore, Type);
}
//===--------------------------------------------------------------------===//

10
llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
View File

@ -897,19 +897,13 @@ EmitSpecialNode(SDNode *Node, bool IsClone, bool IsCloned,
const char *AsmStr = cast<ExternalSymbolSDNode>(AsmStrV)->getSymbol();
MI->addOperand(MachineOperand::CreateES(AsmStr));
// Add the HasSideEffect and isAlignStack bits.
// Add the HasSideEffect, isAlignStack, AsmDialect, MayLoad and MayStore
// bits.
int64_t ExtraInfo =
cast<ConstantSDNode>(Node->getOperand(InlineAsm::Op_ExtraInfo))->
getZExtValue();
MI->addOperand(MachineOperand::CreateImm(ExtraInfo));
// Set the MayLoad and MayStore flags.
if (ExtraInfo & InlineAsm::Extra_MayLoad)
MI->setFlag(MachineInstr::MayLoad);
if (ExtraInfo & InlineAsm::Extra_MayStore)
MI->setFlag(MachineInstr::MayStore);
// Remember to operand index of the group flags.
SmallVector<unsigned, 8> GroupIdx;