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[ms-inline asm] Have buildMSAsmString build a vector of unmodified AsmStrings. 

Add a new static function, buildMSAsmPieces, that will break these strings down
into mnemonic and operands.  Upon a match failure, the idea is to use the
ErrorInfo from MatchInstructionImpl to inspect the mnemonic/operand and 
decide a course of action.  Unfortunately, there's no easy way to test this at
the moment.

llvm-svn: 162321
This commit is contained in:
Chad Rosier 2012-08-21 21:56:39 +00:00
parent ea262f7936
commit b958037958
1 changed files with 35 additions and 7 deletions
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42
clang/lib/Sema/SemaStmtAsm.cpp
View File

@ -459,22 +459,41 @@ static void patchMSAsmStrings(Sema &SemaRef, bool &IsSimple,
AsmStrings[NumAsmStrings] = Asm.c_str();
}
// Break the AsmSting into pieces.
static void buildMSAsmPieces(StringRef Asm, std::vector<StringRef> &Pieces) {
std::pair<StringRef,StringRef> Split = Asm.split(' ');
// Mnemonic
Pieces.push_back(Split.first);
Asm = Split.second;
// Operands
while (!Asm.empty()) {
Split = Asm.split(", ");
Pieces.push_back(Split.first);
Asm = Split.second;
}
}
// Build the unmodified MSAsmString.
static std::string buildMSAsmString(Sema &SemaRef,
ArrayRef<Token> AsmToks,
unsigned &NumAsmStrings) {
std::vector<std::string> &AsmStrings) {
assert (!AsmToks.empty() && "Didn't expect an empty AsmToks!");
NumAsmStrings = 0;
SmallString<512> Res;
SmallString<512> Asm;
for (unsigned i = 0, e = AsmToks.size(); i < e; ++i) {
bool isNewAsm = i == 0 || AsmToks[i].isAtStartOfLine() ||
AsmToks[i].is(tok::kw_asm);
if (isNewAsm) {
++NumAsmStrings;
if (i)
Asm += '\n';
if (i) {
AsmStrings.push_back(Asm.c_str());
Res += Asm;
Asm.clear();
Res += '\n';
}
if (AsmToks[i].is(tok::kw_asm)) {
i++; // Skip __asm
assert (i != e && "Expected another token");
@ -486,7 +505,9 @@ static std::string buildMSAsmString(Sema &SemaRef,
Asm += getSpelling(SemaRef, AsmToks[i]);
}
return Asm.c_str();
AsmStrings.push_back(Asm.c_str());
Res += Asm;
return Res.c_str();
}
StmtResult Sema::ActOnMSAsmStmt(SourceLocation AsmLoc,
@ -511,7 +532,14 @@ StmtResult Sema::ActOnMSAsmStmt(SourceLocation AsmLoc,
}
unsigned NumAsmStrings;
std::string AsmString = buildMSAsmString(*this, AsmToks, NumAsmStrings);
std::vector<std::string> AsmStrings;
std::string AsmString = buildMSAsmString(*this, AsmToks, AsmStrings);
NumAsmStrings = AsmStrings.size();
std::vector<std::vector<StringRef> > Pieces;
Pieces.resize(NumAsmStrings);
for (unsigned i = 0; i != NumAsmStrings; ++i)
buildMSAsmPieces(AsmStrings[i], Pieces[i]);
bool IsSimple;
std::vector<llvm::BitVector> Regs;