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Improvements to inline asm code generation. 

llvm-svn: 46779
This commit is contained in:
Anders Carlsson 2008-02-05 23:18:57 +00:00
parent 38b32e976c
commit b737b6247f
1 changed files with 34 additions and 2 deletions
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36
clang/CodeGen/CGStmt.cpp
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@ -506,13 +506,30 @@ void CodeGenFunction::EmitSwitchStmt(const SwitchStmt &S) {
}
static inline std::string ConvertAsmString(const char *Start,
unsigned NumOperands)
unsigned NumOperands,
bool IsSimple)
{
static unsigned AsmCounter = 0;
AsmCounter++;
std::string Result;
if (IsSimple) {
while (*Start) {
switch (*Start) {
default:
Result += *Start;
break;
case '$':
Result += "$$";
break;
}
Start++;
}
return Result;
}
while (*Start) {
switch (*Start) {
@ -552,6 +569,21 @@ static inline std::string ConvertAsmString(const char *Start,
}
Result += '$' + llvm::utostr(n);
Start = End;
} else if (isalpha(EscapedChar)) {
char *End;
unsigned long n = strtoul(Start + 1, &End, 10);
if (Start == End) {
// FIXME: This should be caught during Sema.
assert(0 && "Missing operand!");
} else if (n >= NumOperands) {
// FIXME: This should be caught during Sema.
assert(0 && "Operand number out of range!");
}
Result += "${" + llvm::utostr(n) + ':' + EscapedChar + '}';
Start = End;
} else {
assert(0 && "Unhandled asm escaped character!");
}
@ -591,7 +623,7 @@ void CodeGenFunction::EmitAsmStmt(const AsmStmt &S) {
std::string AsmString =
ConvertAsmString(std::string(S.getAsmString()->getStrData(),
S.getAsmString()->getByteLength()).c_str(),
S.getNumOutputs() + S.getNumInputs());
S.getNumOutputs() + S.getNumInputs(), S.isSimple());
std::string Constraints;