Index: llvm/trunk/test/Transforms/MergeICmps/X86/pr36557.ll
===================================================================
--- llvm/trunk/test/Transforms/MergeICmps/X86/pr36557.ll
+++ llvm/trunk/test/Transforms/MergeICmps/X86/pr36557.ll
@@ -0,0 +1,160 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -mergeicmps -mtriple=x86_64-unknown-unknown -S | FileCheck %s --check-prefix=X86
+
+source_filename = "qabstractitemmodeltester.cpp"
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64--linux-gnu"
+
+%class.B = type { i32, i32 }
+%class.D = type { i32 }
+%class.C = type { i8 }
+%class.QMessageLogger = type { i8 }
+
+$_ZN1D7compareI1BS1_EEbRKT_RKT0_PKcS9_S9_i = comdat any
+
+@.str = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
+
+; Function Attrs: uwtable
+define dso_local void @_Z8qCompareRK1BS1_(%class.B* nocapture readonly dereferenceable(8) %p1, %class.B* nocapture readonly dereferenceable(8) %p2) local_unnamed_addr #0 {
+entry:
+  %c.i = getelementptr inbounds %class.B, %class.B* %p2, i64 0, i32 0
+  %0 = load i32, i32* %c.i, align 4, !tbaa !2
+  %c2.i = getelementptr inbounds %class.B, %class.B* %p1, i64 0, i32 0
+  %1 = load i32, i32* %c2.i, align 4, !tbaa !2
+  %cmp.i = icmp eq i32 %0, %1
+  br i1 %cmp.i, label %land.rhs.i, label %_ZNK1BeqERKS_.exit
+
+land.rhs.i:                                       ; preds = %entry
+  %m.i = getelementptr inbounds %class.B, %class.B* %p2, i64 0, i32 1
+  %2 = load i32, i32* %m.i, align 4, !tbaa !7
+  %m3.i = getelementptr inbounds %class.B, %class.B* %p1, i64 0, i32 1
+  %3 = load i32, i32* %m3.i, align 4, !tbaa !7
+  %cmp4.i = icmp eq i32 %2, %3
+  br label %_ZNK1BeqERKS_.exit
+
+_ZNK1BeqERKS_.exit:                               ; preds = %entry, %land.rhs.i
+  %4 = phi i1 [ false, %entry ], [ %cmp4.i, %land.rhs.i ]
+  tail call void @_Z14compare_helperb(i1 zeroext %4)
+  ret void
+}
+
+declare dso_local void @_Z14compare_helperb(i1 zeroext) local_unnamed_addr #1
+
+; Function Attrs: uwtable
+define dso_local void @_ZN1D13layoutChangedEv(%class.D* %this) local_unnamed_addr #0 align 2 {
+entry:
+  %a = alloca %class.B, align 4
+  %ref.tmp = alloca i64, align 8
+  %tmpcast = bitcast i64* %ref.tmp to %class.B*
+  %0 = bitcast %class.B* %a to i8*
+  call void @llvm.lifetime.start.p0i8(i64 8, i8* nonnull %0) #3
+  %1 = bitcast i64* %ref.tmp to i8*
+  call void @llvm.lifetime.start.p0i8(i64 8, i8* nonnull %1) #3
+  store i64 0, i64* %ref.tmp, align 8
+  %call = call zeroext i1 @_ZN1D7compareI1BS1_EEbRKT_RKT0_PKcS9_S9_i(%class.D* %this, %class.B* nonnull dereferenceable(8) %a, %class.B* nonnull dereferenceable(8) %tmpcast, i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), i8* getelementptr inbounds ([1 x i8], [1 x i8]* @.str, i64 0, i64 0), i32 3)
+  call void @llvm.lifetime.end.p0i8(i64 8, i8* nonnull %1) #3
+  call void @llvm.lifetime.end.p0i8(i64 8, i8* nonnull %0) #3
+  ret void
+}
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #2
+
+; Function Attrs: uwtable
+define linkonce_odr dso_local zeroext i1 @_ZN1D7compareI1BS1_EEbRKT_RKT0_PKcS9_S9_i(%class.D* %this, %class.B* dereferenceable(8) %p1, %class.B* dereferenceable(8) %p2, i8*, i8*, i8*, i32) local_unnamed_addr #0 comdat align 2 {
+entry:
+  %ref.tmp = alloca %class.C, align 1
+  %ref.tmp5 = alloca %class.QMessageLogger, align 1
+  %ref.tmp6 = alloca %class.C, align 1
+  %c.i = getelementptr inbounds %class.B, %class.B* %p2, i64 0, i32 0
+  %4 = load i32, i32* %c.i, align 4, !tbaa !2
+  %c2.i = getelementptr inbounds %class.B, %class.B* %p1, i64 0, i32 0
+  %5 = load i32, i32* %c2.i, align 4, !tbaa !2
+  %cmp.i = icmp eq i32 %4, %5
+  br i1 %cmp.i, label %land.rhs.i, label %_ZNK1BeqERKS_.exit
+
+land.rhs.i:                                       ; preds = %entry
+  %m.i = getelementptr inbounds %class.B, %class.B* %p2, i64 0, i32 1
+  %6 = load i32, i32* %m.i, align 4, !tbaa !7
+  %m3.i = getelementptr inbounds %class.B, %class.B* %p1, i64 0, i32 1
+  %7 = load i32, i32* %m3.i, align 4, !tbaa !7
+  %cmp4.i = icmp eq i32 %6, %7
+  br label %_ZNK1BeqERKS_.exit
+
+_ZNK1BeqERKS_.exit:                               ; preds = %entry, %land.rhs.i
+  %8 = phi i1 [ false, %entry ], [ %cmp4.i, %land.rhs.i ]
+  %failureReportingMode = getelementptr inbounds %class.D, %class.D* %this, i64 0, i32 0
+  %9 = load i32, i32* %failureReportingMode, align 4, !tbaa !8
+  %cond = icmp eq i32 %9, 0
+  br i1 %cond, label %sw.bb, label %sw.epilog
+
+sw.bb:                                            ; preds = %_ZNK1BeqERKS_.exit
+  br i1 %cmp.i, label %land.rhs.i.i, label %_Z8qCompareRK1BS1_.exit
+
+land.rhs.i.i:                                     ; preds = %sw.bb
+  %m.i.i = getelementptr inbounds %class.B, %class.B* %p2, i64 0, i32 1
+  %10 = load i32, i32* %m.i.i, align 4, !tbaa !7
+  %m3.i.i = getelementptr inbounds %class.B, %class.B* %p1, i64 0, i32 1
+  %11 = load i32, i32* %m3.i.i, align 4, !tbaa !7
+  %cmp4.i.i = icmp eq i32 %10, %11
+  br label %_Z8qCompareRK1BS1_.exit
+
+_Z8qCompareRK1BS1_.exit:                          ; preds = %sw.bb, %land.rhs.i.i
+  %12 = phi i1 [ false, %sw.bb ], [ %cmp4.i.i, %land.rhs.i.i ]
+  tail call void @_Z14compare_helperb(i1 zeroext %12)
+  %13 = getelementptr inbounds %class.C, %class.C* %ref.tmp, i64 0, i32 0
+  call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull %13) #3
+  tail call void @_Z11lcModelTestv()
+  call void @_ZN1C16isWarningEnabledEv(%class.C* nonnull %ref.tmp)
+  call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull %13) #3
+  %14 = getelementptr inbounds %class.QMessageLogger, %class.QMessageLogger* %ref.tmp5, i64 0, i32 0
+  %15 = getelementptr inbounds %class.C, %class.C* %ref.tmp6, i64 0, i32 0
+  br label %for.cond
+
+for.cond:                                         ; preds = %for.cond, %_Z8qCompareRK1BS1_.exit
+  call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull %14) #3
+  call void @llvm.lifetime.start.p0i8(i64 1, i8* nonnull %15) #3
+  call void @_Z11lcModelTestv()
+  %call8 = call i8* @_ZN1C12categoryNameEv(%class.C* nonnull %ref.tmp6)
+  call void @_ZN14QMessageLoggerC1EPciS0_S0_(%class.QMessageLogger* nonnull %ref.tmp5, i8* null, i32 0, i8* null, i8* %call8)
+  call void @_ZN14QMessageLogger7warningEv(%class.QMessageLogger* nonnull %ref.tmp5)
+  call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull %15) #3
+  call void @llvm.lifetime.end.p0i8(i64 1, i8* nonnull %14) #3
+  br label %for.cond
+
+sw.epilog:                                        ; preds = %_ZNK1BeqERKS_.exit
+  ret i1 %8
+}
+
+; Function Attrs: argmemonly nounwind
+declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #2
+
+declare dso_local void @_Z11lcModelTestv() local_unnamed_addr #1
+
+declare dso_local void @_ZN1C16isWarningEnabledEv(%class.C*) local_unnamed_addr #1
+
+declare dso_local i8* @_ZN1C12categoryNameEv(%class.C*) local_unnamed_addr #1
+
+declare dso_local void @_ZN14QMessageLoggerC1EPciS0_S0_(%class.QMessageLogger*, i8*, i32, i8*, i8*) unnamed_addr #1
+
+declare dso_local void @_ZN14QMessageLogger7warningEv(%class.QMessageLogger*) local_unnamed_addr #1
+
+attributes #0 = { uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { argmemonly nounwind }
+attributes #3 = { nounwind }
+
+!llvm.module.flags = !{!0}
+!llvm.ident = !{!1}
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{!"clang version 7.0.0 (trunk 326236) (llvm/trunk 326244)"}
+!2 = !{!3, !4, i64 0}
+!3 = !{!"_ZTS1B", !4, i64 0, !4, i64 4}
+!4 = !{!"int", !5, i64 0}
+!5 = !{!"omnipotent char", !6, i64 0}
+!6 = !{!"Simple C++ TBAA"}
+!7 = !{!3, !4, i64 4}
+!8 = !{!9, !10, i64 0}
+!9 = !{!"_ZTS1D", !10, i64 0}
+!10 = !{!"_ZTSN1A20FailureReportingModeE", !5, i64 0}