[IR] Value: Fix OpCode checks

Value::SubclassID cannot be directly compared to Instruction enums, such as
Instruction::{Call,Invoke,CallBr}. We have to first subtract InstructionVal
from the SubclassID to get the OpCode, similar to Instruction::getOpCode().

Reviewed By: nickdesaulniers

Differential Revision: https://reviews.llvm.org/D104043

1 files changed, 6 insertions, 3 deletions

diff --git a/llvm/lib/IR/Value.cpp b/llvm/lib/IR/Value.cpp
index 33b61c9..c3796f1 100644
--- a/llvm/lib/IR/Value.cpp
+++ b/llvm/lib/IR/Value.cpp
@@ -58,10 +58,13 @@ Value::Value(Type *ty, unsigned scid)
   // FIXME: Why isn't this in the subclass gunk??
   // Note, we cannot call isa<CallInst> before the CallInst has been
   // constructed.
-  if (SubclassID == Instruction::Call || SubclassID == Instruction::Invoke ||
-      SubclassID == Instruction::CallBr)
+  unsigned OpCode = 0;
+  if (SubclassID >= InstructionVal)
+    OpCode = SubclassID - InstructionVal;
+  if (OpCode == Instruction::Call || OpCode == Instruction::Invoke ||
+      OpCode == Instruction::CallBr)
     assert((VTy->isFirstClassType() || VTy->isVoidTy() || VTy->isStructTy()) &&
-           "invalid CallInst type!");
+           "invalid CallBase type!");
   else if (SubclassID != BasicBlockVal &&
            (/*SubclassID < ConstantFirstVal ||*/ SubclassID > ConstantLastVal))
     assert((VTy->isFirstClassType() || VTy->isVoidTy()) &&