//
// The LLVM Compiler Infrastructure
//
-// This file was developed by Chris Lattner and is distributed under the
-// University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// NOTE: when memoizing the function type, we have to be careful to handle the
// case when the type gets refined.
-InlineAsm *InlineAsm::get(const FunctionType *Ty, const std::string &AsmString,
- const std::string &Constraints, bool hasSideEffects) {
+InlineAsm *InlineAsm::get(const FunctionType *Ty, const StringRef &AsmString,
+ const StringRef &Constraints, bool hasSideEffects,
+ bool isMsAsm) {
// FIXME: memoize!
- return new InlineAsm(Ty, AsmString, Constraints, hasSideEffects);
+ return new InlineAsm(Ty, AsmString, Constraints, hasSideEffects, isMsAsm);
}
-InlineAsm::InlineAsm(const FunctionType *Ty, const std::string &asmString,
- const std::string &constraints, bool hasSideEffects)
- : Value(PointerType::get(Ty), Value::InlineAsmVal), AsmString(asmString),
- Constraints(constraints), HasSideEffects(hasSideEffects) {
+InlineAsm::InlineAsm(const FunctionType *Ty, const StringRef &asmString,
+ const StringRef &constraints, bool hasSideEffects,
+ bool isMsAsm)
+ : Value(PointerType::getUnqual(Ty),
+ Value::InlineAsmVal),
+ AsmString(asmString),
+ Constraints(constraints), HasSideEffects(hasSideEffects), IsMsAsm(isMsAsm) {
// Do various checks on the constraint string and type.
assert(Verify(Ty, constraints) && "Function type not legal for constraints!");
/// Parse - Analyze the specified string (e.g. "==&{eax}") and fill in the
/// fields in this structure. If the constraint string is not understood,
/// return true, otherwise return false.
-bool InlineAsm::ConstraintInfo::Parse(const std::string &Str,
+bool InlineAsm::ConstraintInfo::Parse(const StringRef &Str,
std::vector<InlineAsm::ConstraintInfo> &ConstraintsSoFar) {
- std::string::const_iterator I = Str.begin(), E = Str.end();
+ StringRef::iterator I = Str.begin(), E = Str.end();
// Initialize
Type = isInput;
isEarlyClobber = false;
- isIndirectOutput = false;
- hasMatchingInput = false;
+ MatchingInput = -1;
isCommutative = false;
+ isIndirect = false;
- // Parse the prefix.
+ // Parse prefixes.
if (*I == '~') {
Type = isClobber;
++I;
} else if (*I == '=') {
++I;
Type = isOutput;
- if (I != E && *I == '=') {
- isIndirectOutput = true;
- ++I;
- }
+ }
+
+ if (*I == '*') {
+ isIndirect = true;
+ ++I;
}
if (I == E) return true; // Just a prefix, like "==" or "~".
while (I != E) {
if (*I == '{') { // Physical register reference.
// Find the end of the register name.
- std::string::const_iterator ConstraintEnd = std::find(I+1, E, '}');
+ StringRef::iterator ConstraintEnd = std::find(I+1, E, '}');
if (ConstraintEnd == E) return true; // "{foo"
Codes.push_back(std::string(I, ConstraintEnd+1));
I = ConstraintEnd+1;
} else if (isdigit(*I)) { // Matching Constraint
// Maximal munch numbers.
- std::string::const_iterator NumStart = I;
+ StringRef::iterator NumStart = I;
while (I != E && isdigit(*I))
++I;
Codes.push_back(std::string(NumStart, I));
Type != isInput)
return true; // Invalid constraint number.
+ // If Operand N already has a matching input, reject this. An output
+ // can't be constrained to the same value as multiple inputs.
+ if (ConstraintsSoFar[N].hasMatchingInput())
+ return true;
+
// Note that operand #n has a matching input.
- ConstraintsSoFar[N].hasMatchingInput = true;
+ ConstraintsSoFar[N].MatchingInput = ConstraintsSoFar.size();
} else {
// Single letter constraint.
Codes.push_back(std::string(I, I+1));
}
std::vector<InlineAsm::ConstraintInfo>
-InlineAsm::ParseConstraints(const std::string &Constraints) {
+InlineAsm::ParseConstraints(const StringRef &Constraints) {
std::vector<ConstraintInfo> Result;
// Scan the constraints string.
- for (std::string::const_iterator I = Constraints.begin(),
- E = Constraints.end(); I != E; ) {
+ for (StringRef::iterator I = Constraints.begin(),
+ E = Constraints.end(); I != E; ) {
ConstraintInfo Info;
// Find the end of this constraint.
- std::string::const_iterator ConstraintEnd = std::find(I, E, ',');
+ StringRef::iterator ConstraintEnd = std::find(I, E, ',');
if (ConstraintEnd == I || // Empty constraint like ",,"
Info.Parse(std::string(I, ConstraintEnd), Result)) {
/// Verify - Verify that the specified constraint string is reasonable for the
/// specified function type, and otherwise validate the constraint string.
-bool InlineAsm::Verify(const FunctionType *Ty, const std::string &ConstStr) {
+bool InlineAsm::Verify(const FunctionType *Ty, const StringRef &ConstStr) {
if (Ty->isVarArg()) return false;
std::vector<ConstraintInfo> Constraints = ParseConstraints(ConstStr);
if (Constraints.empty() && !ConstStr.empty()) return false;
unsigned NumOutputs = 0, NumInputs = 0, NumClobbers = 0;
+ unsigned NumIndirect = 0;
for (unsigned i = 0, e = Constraints.size(); i != e; ++i) {
switch (Constraints[i].Type) {
case InlineAsm::isOutput:
- if (!Constraints[i].isIndirectOutput) {
- if (NumInputs || NumClobbers) return false; // outputs come first.
+ if ((NumInputs-NumIndirect) != 0 || NumClobbers != 0)
+ return false; // outputs before inputs and clobbers.
+ if (!Constraints[i].isIndirect) {
++NumOutputs;
break;
}
- // FALLTHROUGH for IndirectOutputs.
+ ++NumIndirect;
+ // FALLTHROUGH for Indirect Outputs.
case InlineAsm::isInput:
if (NumClobbers) return false; // inputs before clobbers.
++NumInputs;
break;
}
}
-
- if (NumOutputs > 1) return false; // Only one result allowed so far.
- if ((Ty->getReturnType() != Type::VoidTy) != NumOutputs)
- return false; // NumOutputs = 1 iff has a result type.
+ switch (NumOutputs) {
+ case 0:
+ if (Ty->getReturnType() != Type::getVoidTy(Ty->getContext())) return false;
+ break;
+ case 1:
+ if (isa<StructType>(Ty->getReturnType())) return false;
+ break;
+ default:
+ const StructType *STy = dyn_cast<StructType>(Ty->getReturnType());
+ if (STy == 0 || STy->getNumElements() != NumOutputs)
+ return false;
+ break;
+ }
if (Ty->getNumParams() != NumInputs) return false;
return true;
}
-DEFINING_FILE_FOR(InlineAsm)
projects / oota-llvm.git / blobdiff