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merge constraint type analysis stuff together.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@36545 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2007-04-28 21:01:43 +00:00
parent 0c58340aea
commit 2a600be226
1 changed files with 21 additions and 14 deletions
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35
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@ -3178,6 +3178,10 @@ namespace {
struct AsmOperandInfo : public InlineAsm::ConstraintInfo {
/// ConstraintCode - This contains the actual string for the code, like "m".
std::string ConstraintCode;
/// ConstraintType - Information about the constraint code, e.g. Register,
/// RegisterClass, Memory, Other, Unknown.
TargetLowering::ConstraintType ConstraintType;
/// CallOperand/CallOperandval - If this is the result output operand or a
/// clobber, this is null, otherwise it is the incoming operand to the
@ -3189,7 +3193,8 @@ struct AsmOperandInfo : public InlineAsm::ConstraintInfo {
MVT::ValueType ConstraintVT;
AsmOperandInfo(const InlineAsm::ConstraintInfo &info)
: InlineAsm::ConstraintInfo(info),
: InlineAsm::ConstraintInfo(info),
ConstraintType(TargetLowering::C_Unknown),
CallOperand(0,0), CallOperandVal(0), ConstraintVT(MVT::Other) {
}
};
@ -3217,9 +3222,6 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
ConstraintOperands.push_back(AsmOperandInfo(ConstraintInfos[i]));
AsmOperandInfo &OpInfo = ConstraintOperands.back();
// Compute the constraint code to use.
OpInfo.ConstraintCode = GetMostGeneralConstraint(OpInfo.Codes, TLI);
MVT::ValueType OpVT = MVT::Other;
// Compute the value type for each operand.
@ -3255,6 +3257,13 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
}
OpInfo.ConstraintVT = OpVT;
// Compute the constraint code to use.
OpInfo.ConstraintCode = GetMostGeneralConstraint(OpInfo.Codes, TLI);
// Compute the constraint type.
// FIXME: merge this into GetMostGeneralConstraint.
OpInfo.ConstraintType = TLI.getConstraintType(OpInfo.ConstraintCode);
if (TLI.getRegForInlineAsmConstraint(OpInfo.ConstraintCode, OpVT).first ==0)
continue; // Not assigned a fixed reg.
@ -3315,7 +3324,8 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
if (OpInfo.ConstraintCode.size() == 1) // not a physreg name.
CTy = TLI.getConstraintType(OpInfo.ConstraintCode);
if (CTy != TargetLowering::C_RegisterClass) {
if (CTy != TargetLowering::C_RegisterClass &&
CTy != TargetLowering::C_Register) {
// Memory output, or 'other' output (e.g. 'X' constraint).
SDOperand InOperandVal = OpInfo.CallOperand;
@ -3333,8 +3343,7 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
break;
}
// Otherwise, this is a register output.
assert(CTy == TargetLowering::C_RegisterClass && "Unknown op type!");
// Otherwise, this is a register or register class output.
// If this is an early-clobber output, or if there is an input
// constraint that matches this, we need to reserve the input register
@ -3416,11 +3425,7 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
}
}
TargetLowering::ConstraintType CTy = TargetLowering::C_RegisterClass;
if (OpInfo.ConstraintCode.size() == 1) // not a physreg name.
CTy = TLI.getConstraintType(OpInfo.ConstraintCode);
if (CTy == TargetLowering::C_Other) {
if (OpInfo.ConstraintType == TargetLowering::C_Other) {
assert(!OpInfo.isIndirect &&
"Don't know how to handle indirect other inputs yet!");
@ -3438,7 +3443,7 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
AsmNodeOperands.push_back(DAG.getConstant(ResOpType, MVT::i32));
AsmNodeOperands.push_back(InOperandVal);
break;
} else if (CTy == TargetLowering::C_Memory) {
} else if (OpInfo.ConstraintType == TargetLowering::C_Memory) {
// Memory input. Memory operands really want the address of the value,
// so we want an indirect input. If we don't have an indirect input,
// spill the value somewhere if we can, otherwise spill it to a stack
@ -3475,7 +3480,9 @@ void SelectionDAGLowering::visitInlineAsm(CallInst &I) {
break;
}
assert(CTy == TargetLowering::C_RegisterClass && "Unknown op type!");
assert((OpInfo.ConstraintType == TargetLowering::C_RegisterClass ||
OpInfo.ConstraintType == TargetLowering::C_Register) &&
"Unknown constraint type!");
assert(!OpInfo.isIndirect &&
"Don't know how to handle indirect register inputs yet!");