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Fast-isel support for simple inline asms.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130205 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2011-04-26 17:18:34 +00:00
parent ab92d1e1c2
commit a61e73bda5
2 changed files with 32 additions and 10 deletions
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41
lib/CodeGen/SelectionDAG/FastISel.cpp
View File

@ -482,14 +482,35 @@ bool FastISel::SelectGetElementPtr(const User *I) {
}
bool FastISel::SelectCall(const User *I) {
const Function *F = cast<CallInst>(I)->getCalledFunction();
const CallInst *Call = cast<CallInst>(I);
// Handle simple inline asms.
if (const InlineAsm *IA = dyn_cast<InlineAsm>(Call->getArgOperand(0))) {
// Don't attempt to handle constraints.
if (!IA->getConstraintString().empty())
return false;
unsigned ExtraInfo = 0;
if (IA->hasSideEffects())
ExtraInfo |= InlineAsm::Extra_HasSideEffects;
if (IA->isAlignStack())
ExtraInfo |= InlineAsm::Extra_IsAlignStack;
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL,
TII.get(TargetOpcode::INLINEASM))
.addExternalSymbol(IA->getAsmString().c_str())
.addImm(ExtraInfo);
return true;
}
const Function *F = Call->getCalledFunction();
if (!F) return false;
// Handle selected intrinsic function calls.
switch (F->getIntrinsicID()) {
default: break;
case Intrinsic::dbg_declare: {
const DbgDeclareInst *DI = cast<DbgDeclareInst>(I);
const DbgDeclareInst *DI = cast<DbgDeclareInst>(Call);
if (!DIVariable(DI->getVariable()).Verify() ||
!FuncInfo.MF->getMMI().hasDebugInfo())
return true;
@ -521,7 +542,7 @@ bool FastISel::SelectCall(const User *I) {
}
case Intrinsic::dbg_value: {
// This form of DBG_VALUE is target-independent.
const DbgValueInst *DI = cast<DbgValueInst>(I);
const DbgValueInst *DI = cast<DbgValueInst>(Call);
const TargetInstrDesc &II = TII.get(TargetOpcode::DBG_VALUE);
const Value *V = DI->getValue();
if (!V) {
@ -550,7 +571,7 @@ bool FastISel::SelectCall(const User *I) {
return true;
}
case Intrinsic::eh_exception: {
EVT VT = TLI.getValueType(I->getType());
EVT VT = TLI.getValueType(Call->getType());
if (TLI.getOperationAction(ISD::EXCEPTIONADDR, VT)!=TargetLowering::Expand)
break;
@ -561,18 +582,18 @@ bool FastISel::SelectCall(const User *I) {
unsigned ResultReg = createResultReg(RC);
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(Reg);
UpdateValueMap(I, ResultReg);
UpdateValueMap(Call, ResultReg);
return true;
}
case Intrinsic::eh_selector: {
EVT VT = TLI.getValueType(I->getType());
EVT VT = TLI.getValueType(Call->getType());
if (TLI.getOperationAction(ISD::EHSELECTION, VT) != TargetLowering::Expand)
break;
if (FuncInfo.MBB->isLandingPad())
AddCatchInfo(*cast<CallInst>(I), &FuncInfo.MF->getMMI(), FuncInfo.MBB);
AddCatchInfo(*Call, &FuncInfo.MF->getMMI(), FuncInfo.MBB);
else {
#ifndef NDEBUG
FuncInfo.CatchInfoLost.insert(cast<CallInst>(I));
FuncInfo.CatchInfoLost.insert(Call);
#endif
// FIXME: Mark exception selector register as live in. Hack for PR1508.
unsigned Reg = TLI.getExceptionSelectorRegister();
@ -586,7 +607,7 @@ bool FastISel::SelectCall(const User *I) {
BuildMI(*FuncInfo.MBB, FuncInfo.InsertPt, DL, TII.get(TargetOpcode::COPY),
ResultReg).addReg(Reg);
bool ResultRegIsKill = hasTrivialKill(I);
bool ResultRegIsKill = hasTrivialKill(Call);
// Cast the register to the type of the selector.
if (SrcVT.bitsGT(MVT::i32))
@ -599,7 +620,7 @@ bool FastISel::SelectCall(const User *I) {
// Unhandled operand. Halt "fast" selection and bail.
return false;
UpdateValueMap(I, ResultReg);
UpdateValueMap(Call, ResultReg);
return true;
}

1
test/CodeGen/X86/fast-isel.ll
View File

@ -20,6 +20,7 @@ fast:
%t6 = add i32 %t5, 2
%t7 = getelementptr i32* %y, i32 1
%t8 = getelementptr i32* %t7, i32 %t6
call void asm sideeffect "hello world", ""()
br label %exit
exit: