; LLVM IR from swiftlang/swift :: utils/embedded-test-support (libc)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local i32 @memcmp(ptr noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i8, align 1
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !11
  br label %11

11:                                               ; preds = %42, %3
  %12 = load i32, ptr %8, align 4, !tbaa !11
  %13 = sext i32 %12 to i64
  %14 = load i64, ptr %7, align 8, !tbaa !9
  %15 = icmp ult i64 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %11
  store i32 2, ptr %9, align 4
  br label %45

17:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 1, ptr %10) #2
  %18 = load ptr, ptr %6, align 8, !tbaa !5
  %19 = load i32, ptr %8, align 4, !tbaa !11
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i8, ptr %18, i64 %20
  %22 = load i8, ptr %21, align 1, !tbaa !13
  %23 = sext i8 %22 to i32
  %24 = load ptr, ptr %5, align 8, !tbaa !5
  %25 = load i32, ptr %8, align 4, !tbaa !11
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds i8, ptr %24, i64 %26
  %28 = load i8, ptr %27, align 1, !tbaa !13
  %29 = sext i8 %28 to i32
  %30 = sub nsw i32 %23, %29
  %31 = trunc i32 %30 to i8
  store i8 %31, ptr %10, align 1, !tbaa !13
  %32 = load i8, ptr %10, align 1, !tbaa !13
  %33 = sext i8 %32 to i32
  %34 = icmp ne i32 %33, 0
  br i1 %34, label %35, label %38

35:                                               ; preds = %17
  %36 = load i8, ptr %10, align 1, !tbaa !13
  %37 = sext i8 %36 to i32
  store i32 %37, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %39

38:                                               ; preds = %17
  store i32 0, ptr %9, align 4
  br label %39

39:                                               ; preds = %38, %35
  call void @llvm.lifetime.end.p0(i64 1, ptr %10) #2
  %40 = load i32, ptr %9, align 4
  switch i32 %40, label %45 [
    i32 0, label %41
  ]

41:                                               ; preds = %39
  br label %42

42:                                               ; preds = %41
  %43 = load i32, ptr %8, align 4, !tbaa !11
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %8, align 4, !tbaa !11
  br label %11, !llvm.loop !14

45:                                               ; preds = %39, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %46 = load i32, ptr %9, align 4
  switch i32 %46, label %50 [
    i32 2, label %47
    i32 1, label %48
  ]

47:                                               ; preds = %45
  store i32 0, ptr %4, align 4
  br label %48

48:                                               ; preds = %47, %45
  %49 = load i32, ptr %4, align 4
  ret i32 %49

50:                                               ; preds = %45
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!7, !7, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

; Function Attrs: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local i32 @memcmp(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #0 {
  %.not1621.not = icmp eq i64 %2, 0
  br i1 %.not1621.not, label %.split.loop.exit, label %.lr.ph

4:                                                ; preds = %.lr.ph
  %indvars.iv.next = add nuw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %2
  br i1 %exitcond.not, label %.split.loop.exit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %3, %4
  %indvars.iv = phi i64 [ %indvars.iv.next, %4 ], [ 0, %3 ]
  %5 = getelementptr inbounds i8, ptr %1, i64 %indvars.iv
  %6 = load i8, ptr %5, align 1, !tbaa !7
  %7 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %8 = load i8, ptr %7, align 1, !tbaa !7
  %.not = icmp eq i8 %6, %8
  br i1 %.not, label %4, label %.split.loop.exit17

.split.loop.exit17:                               ; preds = %.lr.ph
  %9 = sub i8 %6, %8
  %10 = sext i8 %9 to i32
  br label %.split.loop.exit

.split.loop.exit:                                 ; preds = %4, %3, %.split.loop.exit17
  %spec.select = phi i32 [ %10, %.split.loop.exit17 ], [ 0, %3 ], [ 0, %4 ]
  ret i32 %spec.select
}

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: read) uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass