reject undef/zero labels. This fixes PR3281:crash0[56].ll with these
diagnostics:
llvm-as: crash05.ll:1:14: invalid type for null constant
global label zeroinitializer addrspace (75), section "c"
^
llvm-as: crash06.ll:2:14: invalid type for null constant
udiv label zeroinitializer, @0
^
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61681 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 6894639..bdb9453 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -1906,6 +1906,9 @@
V = ConstantPointerNull::get(cast<PointerType>(Ty));
return false;
case ValID::t_Undef:
+ // FIXME: LabelTy should not be a first-class type.
+ if (!Ty->isFirstClassType() || Ty == Type::LabelTy)
+ return Error(ID.Loc, "invalid type for undef constant");
V = UndefValue::get(Ty);
return false;
case ValID::t_EmptyArray:
@@ -1914,7 +1917,8 @@
V = UndefValue::get(Ty);
return false;
case ValID::t_Zero:
- if (!Ty->isFirstClassType())
+ // FIXME: LabelTy should not be a first-class type.
+ if (!Ty->isFirstClassType() || Ty == Type::LabelTy)
return Error(ID.Loc, "invalid type for null constant");
V = Constant::getNullValue(Ty);
return false;