Tweak a test so it actually gets autogened

Author: preames

llvm/test/Transforms/MergeICmps/X86/int64-and-ptr.ll

@@ -1,14 +1,25 @@
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
-; RUN: opt < %s -mtriple=x86_64-unknown-unknown -mergeicmps -verify-dom-info -S | FileCheck %s --check-prefix=X86
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --force-update
+; RUN: opt < %s -mtriple=x86_64-unknown-unknown -mergeicmps -verify-dom-info -S 2>&1 | FileCheck %s
 
 ; 8-byte int and 8-byte pointer should merge into a 16-byte memcmp.
-; X86: memcmp(i8* {{.*}}, i8* {{.*}}, i64 16)
 
 %struct.outer = type { i64, %struct.inner* }
 %struct.inner = type { i32, i32, i32 }
 
 ; Function Attrs: nounwind uwtable
-define dso_local i1 @"?foo@@YAHAEAUouter@@0@Z"(%struct.outer* align 8 dereferenceable(16) %o1, %struct.outer* align 8 dereferenceable(116) %o2) local_unnamed_addr #0 {
+define i1 @test(%struct.outer* align 8 dereferenceable(16) %o1, %struct.outer* align 8 dereferenceable(116) %o2) local_unnamed_addr #0 {
+; CHECK-LABEL: @test(
+; CHECK-NEXT:  "entry+if.then":
+; CHECK-NEXT:    [[TMP0:%.*]] = getelementptr inbounds [[STRUCT_OUTER:%.*]], %struct.outer* [[O1:%.*]], i64 0, i32 0
+; CHECK-NEXT:    [[TMP1:%.*]] = getelementptr inbounds [[STRUCT_OUTER]], %struct.outer* [[O2:%.*]], i64 0, i32 0
+; CHECK-NEXT:    [[CSTR:%.*]] = bitcast i64* [[TMP0]] to i8*
+; CHECK-NEXT:    [[CSTR1:%.*]] = bitcast i64* [[TMP1]] to i8*
+; CHECK-NEXT:    [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i64 16)
+; CHECK-NEXT:    [[TMP2:%.*]] = icmp eq i32 [[MEMCMP]], 0
+; CHECK-NEXT:    br label [[IF_END5:%.*]]
+; CHECK:       if.end5:
+; CHECK-NEXT:    ret i1 [[TMP2]]
+;
 entry:
   %p1 = getelementptr inbounds %struct.outer, %struct.outer* %o1, i64 0, i32 0
   %0 = load i64, i64* %p1, align 8