Add CodeGen support for indirect goto.
- Follows emission scheme used by llvm-gcc, i.e. invent an id for
each label whose address is taken and replace each indirect goto by
a switch to each possible target.
- Currently we emit a switch for each indirect goto instead of
merging them as llvm-gcc does.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@54318 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index c44af4b..e8adc59 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -117,6 +117,12 @@
Value *VisitSizeOfAlignOfTypeExpr(const SizeOfAlignOfTypeExpr *E) {
return EmitSizeAlignOf(E->getArgumentType(), E->getType(), E->isSizeOf());
}
+ Value *VisitAddrLabelExpr(const AddrLabelExpr *E) {
+ Value *V = llvm::ConstantInt::get(llvm::Type::Int32Ty,
+ CGF.GetIDForAddrOfLabel(E->getLabel()));
+ return Builder.CreateIntToPtr(V,
+ llvm::PointerType::getUnqual(llvm::Type::Int8Ty));
+ }
// l-values.
Value *VisitDeclRefExpr(DeclRefExpr *E) {