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More constant expr work. 

llvm-svn: 59405
This commit is contained in:
Anders Carlsson 2008-11-16 06:23:45 +00:00
parent 9ce8a533cd
commit 430887742e
1 changed files with 18 additions and 6 deletions
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24
clang/lib/CodeGen/CGExprConstant.cpp
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@ -743,6 +743,7 @@ public:
return llvm::ConstantInt::get(llvm::APInt(ResultWidth, Val));
}
public:
llvm::Constant *EmitLValue(Expr *E) {
switch (E->getStmtClass()) {
default: break;
@ -798,6 +799,13 @@ public:
}
case Expr::StringLiteralClass:
return CGM.GetAddrOfConstantStringFromLiteral(cast<StringLiteral>(E));
case Expr::ObjCStringLiteralClass: {
ObjCStringLiteral* SL = cast<ObjCStringLiteral>(E);
std::string S(SL->getString()->getStrData(),
SL->getString()->getByteLength());
llvm::Constant *C = CGM.getObjCRuntime().GenerateConstantString(S);
return llvm::ConstantExpr::getBitCast(C, ConvertType(E->getType()));
}
case Expr::UnaryOperatorClass: {
UnaryOperator *Exp = cast<UnaryOperator>(E);
switch (Exp->getOpcode()) {
@ -831,7 +839,6 @@ public:
} // end anonymous namespace.
llvm::Constant *CodeGenModule::EmitConstantExpr(const Expr *E,
CodeGenFunction *CGF) {
QualType type = Context.getCanonicalType(E->getType());
@ -843,13 +850,18 @@ llvm::Constant *CodeGenModule::EmitConstantExpr(const Expr *E,
switch (V.getKind()) {
default: assert(0 && "unhandled value kind!");
case APValue::LValue: {
if (V.getLValueBase())
break;
llvm::Constant *Offset = llvm::ConstantInt::get(llvm::Type::Int64Ty,
V.getLValueOffset());
llvm::Constant *C = llvm::ConstantInt::get(llvm::Type::Int64Ty,
V.getLValueOffset());
if (const Expr *LVBase = V.getLValueBase()) {
llvm::Constant *Base =
ConstExprEmitter(*this, CGF).EmitLValue(const_cast<Expr*>(LVBase));
return llvm::ConstantExpr::getGetElementPtr(Base, &Offset, 1);
}
return llvm::ConstantExpr::getIntToPtr(C, getTypes().ConvertType(type));
return llvm::ConstantExpr::getIntToPtr(Offset,
getTypes().ConvertType(type));
}
case APValue::Int:
llvm::Constant *C = llvm::ConstantInt::get(V.getInt());