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[ms-inline asm] Add support for calling functions from inline assembly.

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Part of rdar://12991541

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172121 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chad Rosier
2013-01-10 22:10:27 +00:00
parent 48fdf9b379
commit c1ec207b61
5 changed files with 66 additions and 18 deletions
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25
lib/MC/MCParser/AsmParser.cpp
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@ -3777,8 +3777,8 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
MCAsmParserSemaCallback &SI) {
SmallVector<void *, 4> InputDecls;
SmallVector<void *, 4> OutputDecls;
SmallVector<bool, 4> InputDeclsOffsetOf;
SmallVector<bool, 4> OutputDeclsOffsetOf;
SmallVector<bool, 4> InputDeclsAddressOf;
SmallVector<bool, 4> OutputDeclsAddressOf;
SmallVector<std::string, 4> InputConstraints;
SmallVector<std::string, 4> OutputConstraints;
std::set<std::string> ClobberRegs;
@ -3815,7 +3815,7 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
}
// Register operand.
if (Operand->isReg() && !Operand->isOffsetOf()) {
if (Operand->isReg() && !Operand->needAddressOf()) {
unsigned NumDefs = Desc.getNumDefs();
// Clobber.
if (NumDefs && Operand->getMCOperandNum() < NumDefs) {
@ -3829,11 +3829,12 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
// Expr/Input or Output.
unsigned Size;
bool IsVarDecl;
void *OpDecl = SI.LookupInlineAsmIdentifier(Operand->getName(), AsmLoc,
Size);
Size, IsVarDecl);
if (OpDecl) {
bool isOutput = (i == 1) && Desc.mayStore();
if (!Operand->isOffsetOf() && Operand->needSizeDirective())
if (Operand->isMem() && Operand->needSizeDirective())
AsmStrRewrites.push_back(AsmRewrite(AOK_SizeDirective,
Operand->getStartLoc(),
/*Len*/0,
@ -3842,7 +3843,7 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
std::string Constraint = "=";
++InputIdx;
OutputDecls.push_back(OpDecl);
OutputDeclsOffsetOf.push_back(Operand->isOffsetOf());
OutputDeclsAddressOf.push_back(Operand->needAddressOf());
Constraint += Operand->getConstraint().str();
OutputConstraints.push_back(Constraint);
AsmStrRewrites.push_back(AsmRewrite(AOK_Output,
@ -3850,7 +3851,7 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
Operand->getNameLen()));
} else {
InputDecls.push_back(OpDecl);
InputDeclsOffsetOf.push_back(Operand->isOffsetOf());
InputDeclsAddressOf.push_back(Operand->needAddressOf());
InputConstraints.push_back(Operand->getConstraint().str());
AsmStrRewrites.push_back(AsmRewrite(AOK_Input,
Operand->getStartLoc(),
@ -3876,14 +3877,14 @@ bool AsmParser::ParseMSInlineAsm(void *AsmLoc, std::string &AsmString,
OpDecls.resize(NumExprs);
Constraints.resize(NumExprs);
// FIXME: Constraints are hard coded to 'm', but we need an 'r'
// constraint for offsetof. This needs to be cleaned up!
// constraint for addressof. This needs to be cleaned up!
for (unsigned i = 0; i < NumOutputs; ++i) {
OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsOffsetOf[i]);
Constraints[i] = OutputDeclsOffsetOf[i] ? "=r" : OutputConstraints[i];
OpDecls[i] = std::make_pair(OutputDecls[i], OutputDeclsAddressOf[i]);
Constraints[i] = OutputDeclsAddressOf[i] ? "=r" : OutputConstraints[i];
}
for (unsigned i = 0, j = NumOutputs; i < NumInputs; ++i, ++j) {
OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsOffsetOf[i]);
Constraints[j] = InputDeclsOffsetOf[i] ? "r" : InputConstraints[i];
OpDecls[j] = std::make_pair(InputDecls[i], InputDeclsAddressOf[i]);
Constraints[j] = InputDeclsAddressOf[i] ? "r" : InputConstraints[i];
}
}