[llvm] r361001 - [MergeICmps] Add test from PR41917.

[Clement Courbet via llvm-commits]

Author: courbet
Date: Fri May 17 01:52:25 2019
New Revision: 361001

URL: http://llvm.org/viewvc/llvm-project?rev=361001&view=rev
Log:
[MergeICmps] Add test from PR41917.

Added:
    llvm/trunk/test/Transforms/MergeICmps/X86/pr41917.ll

Added: llvm/trunk/test/Transforms/MergeICmps/X86/pr41917.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/MergeICmps/X86/pr41917.ll?rev=361001&view=auto
==============================================================================
--- llvm/trunk/test/Transforms/MergeICmps/X86/pr41917.ll (added)
+++ llvm/trunk/test/Transforms/MergeICmps/X86/pr41917.ll Fri May 17 01:52:25 2019
@@ -0,0 +1,76 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -mergeicmps -S | FileCheck %s
+
+target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
+target triple = "i386-pc-windows-msvc19.11.0"
+
+%class.a = type { i32, i32, i32, i32, i32 }
+
+; Function Attrs: nounwind optsize
+define dso_local zeroext i1 @pr41917(%class.a* byval nocapture readonly align 4 %g, %class.a* byval nocapture readonly align 4 %p2) local_unnamed_addr #0 {
+; CHECK-LABEL: @pr41917(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[CALL:%.*]] = tail call zeroext i1 @f2() #3
+; CHECK-NEXT:    br i1 [[CALL]], label [[LAND_RHS:%.*]], label [[LAND_END:%.*]]
+; CHECK:       land.rhs:
+; CHECK-NEXT:    [[CALL1:%.*]] = tail call zeroext i1 @f2() #3
+; CHECK-NEXT:    br label [[LAND_END]]
+; CHECK:       land.end:
+; CHECK-NEXT:    [[C:%.*]] = getelementptr inbounds [[CLASS_A:%.*]], %class.a* [[G:%.*]], i32 0, i32 1
+; CHECK-NEXT:    [[C2:%.*]] = getelementptr inbounds [[CLASS_A]], %class.a* [[P2:%.*]], i32 0, i32 1
+; CHECK-NEXT:    [[CSTR:%.*]] = bitcast i32* [[C]] to i8*
+; CHECK-NEXT:    [[CSTR1:%.*]] = bitcast i32* [[C2]] to i8*
+; CHECK-NEXT:    [[MEMCMP:%.*]] = call i32 @memcmp(i8* [[CSTR]], i8* [[CSTR1]], i32 8)
+; CHECK-NEXT:    [[TMP0:%.*]] = icmp eq i32 [[MEMCMP]], 0
+; CHECK-NEXT:    br label [[LAND_END6:%.*]]
+; CHECK:       land.end6:
+; CHECK-NEXT:    [[TMP1:%.*]] = phi i1 [ [[TMP0]], [[LAND_END]] ]
+; CHECK-NEXT:    ret i1 [[TMP1]]
+;
+entry:
+  %call = tail call zeroext i1 @f2() #2
+  br i1 %call, label %land.rhs, label %land.end
+
+land.rhs:                                         ; preds = %entry
+  %call1 = tail call zeroext i1 @f2() #2
+  br label %land.end
+
+land.end:                                         ; preds = %land.rhs, %entry
+  %c = getelementptr inbounds %class.a, %class.a* %g, i32 0, i32 1
+  %0 = load i32, i32* %c, align 4, !tbaa !3
+  %c2 = getelementptr inbounds %class.a, %class.a* %p2, i32 0, i32 1
+  %1 = load i32, i32* %c2, align 4, !tbaa !3
+  %cmp = icmp eq i32 %0, %1
+  br i1 %cmp, label %land.rhs3, label %land.end6
+
+land.rhs3:                                        ; preds = %land.end
+  %h = getelementptr inbounds %class.a, %class.a* %g, i32 0, i32 2
+  %2 = load i32, i32* %h, align 4, !tbaa !8
+  %h4 = getelementptr inbounds %class.a, %class.a* %p2, i32 0, i32 2
+  %3 = load i32, i32* %h4, align 4, !tbaa !8
+  %cmp5 = icmp eq i32 %2, %3
+  br label %land.end6
+
+land.end6:                                        ; preds = %land.rhs3, %land.end
+  %4 = phi i1 [ false, %land.end ], [ %cmp5, %land.rhs3 ]
+  ret i1 %4
+}
+
+declare dso_local zeroext i1 @f2() local_unnamed_addr #1
+
+attributes #0 = { nounwind optsize "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "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-features"="+cx8,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { optsize "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-features"="+cx8,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #2 = { nounwind optsize }
+
+!llvm.module.flags = !{!0, !1}
+!llvm.ident = !{!2}
+
+!0 = !{i32 1, !"NumRegisterParameters", i32 0}
+!1 = !{i32 1, !"wchar_size", i32 2}
+!2 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project.git 1a8630ac2839d0e73fd3b15dc38501e4c6525a7e)"}
+!3 = !{!4, !5, i64 4}
+!4 = !{!"?AVa@@", !5, i64 0, !5, i64 4, !5, i64 8, !5, i64 12, !5, i64 16}
+!5 = !{!"int", !6, i64 0}
+!6 = !{!"omnipotent char", !7, i64 0}
+!7 = !{!"Simple C++ TBAA"}
+!8 = !{!4, !5, i64 8}