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Implement implicit conversions in return stmts.

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llvm-svn: 39653
This commit is contained in:
Chris Lattner 2007-06-13 20:50:31 +00:00
parent 53621a535d
commit cf98efa73b
1 changed files with 13 additions and 5 deletions
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18
clang/CodeGen/CGStmt.cpp
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@ -249,7 +249,10 @@ void CodeGenFunction::EmitReturnStmt(const ReturnStmt &S) {
if (RV)
RetVal = EmitExpr(RV);
if (CurFuncDecl->getType()->isVoidType()) {
QualType FnRetTy = CurFuncDecl->getType().getCanonicalType();
FnRetTy = cast<FunctionType>(FnRetTy)->getResultType();
if (FnRetTy->isVoidType()) {
// If the function returns void, emit ret void, and ignore the retval.
Builder.CreateRetVoid();
} else if (RV == 0) {
@ -259,11 +262,16 @@ void CodeGenFunction::EmitReturnStmt(const ReturnStmt &S) {
Builder.CreateRetVoid(); // struct return etc.
else
Builder.CreateRet(llvm::UndefValue::get(RetTy));
} else if (RetVal.isScalar()) {
// FIXME: return should coerce its operand to the return type!
Builder.CreateRet(RetVal.getVal());
} else {
assert(0 && "FIXME: aggregate return unimp");
// Do implicit conversions to the returned type.
RetVal = EmitConversion(RetVal, RV->getType(), FnRetTy, SourceLocation());
if (RetVal.isScalar()) {
// FIXME: Pass return loc in!
Builder.CreateRet(RetVal.getVal());
} else {
assert(0 && "FIXME: aggregate return unimp");
}
}
// Emit a block after the branch so that dead code after a return has some