InstSimplify: Don't try to replace an extractvalue/insertvalue pair with the original value if types don't match.

Fixes clang selfhost.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139120 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/InstSimplify/2011-09-05-InsertExtractValue.ll

@@ -1,11 +1,8 @@
 ; RUN: opt < %s -instsimplify -S | FileCheck %s
 
-; CHECK-NOT: extractvalue
-; CHECK-NOT: insertvalue
-
 declare void @bar()
 
-define void @foo() {
+define void @test1() {
 entry:
   invoke void @bar() to label %cont unwind label %lpad
 cont:
@@ -17,6 +14,16 @@ lpad:
   %exc_ptr2 = insertvalue { i8*, i32 } undef, i8* %exc_ptr, 0
   %filter2 = insertvalue { i8*, i32 } %exc_ptr2, i32 %filter, 1
   resume { i8*, i32 } %filter2
+; CHECK: @test1
+; CHECK-NOT: extractvalue
+; CHECK-NOT: insertvalue
 }
 
 declare i32 @__gxx_personality_v0(i32, i64, i8*, i8*)
+
+define { i8, i32 } @test2({ i8*, i32 } %x) {
+  %ex = extractvalue { i8*, i32 } %x, 1
+  %ins = insertvalue { i8, i32 } undef, i32 %ex, 1
+  ret { i8, i32 } %ins
+; CHECK: @test2
+}