Index: llvm/lib/IR/Globals.cpp
===================================================================
--- llvm/lib/IR/Globals.cpp
+++ llvm/lib/IR/Globals.cpp
@@ -354,6 +354,7 @@
     case Instruction::PtrToInt:
     case Instruction::BitCast:
     case Instruction::GetElementPtr:
+    case Instruction::AddrSpaceCast:
       return findBaseObject(CE->getOperand(0), Aliases, Op);
     default:
       break;
Index: llvm/test/Assembler/ifunc-addrspacecast.ll
===================================================================
--- /dev/null
+++ llvm/test/Assembler/ifunc-addrspacecast.ll
@@ -0,0 +1,9 @@
+; RUN: llvm-as < %s | llvm-dis | FileCheck %s
+
+; CHECK: @ifunc_addrspacecast_as1_to_as0 = ifunc void (), addrspacecast (ptr addrspace(1) @resolver_as1 to ptr)
+@ifunc_addrspacecast_as1_to_as0 = ifunc void (), ptr addrspacecast (ptr addrspace(1) @resolver_as1 to ptr)
+
+; CHECK: define ptr @resolver_as1() addrspace(1) {
+define ptr @resolver_as1() addrspace(1) {
+  ret ptr null
+}