; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/CPP/Common/MyString.ll (Z27StringsAreEqualNoCase_AsciiPKwPKc)

; 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef signext i8 @_Z17MyCharLower_Asciic(i8 noundef signext) #1

declare i32 @__gxx_personality_v0(...)

; Function Attrs: noinline noreturn nounwind uwtable
declare hidden void @__clang_call_terminate(ptr noundef) #2

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef signext i32 @_Z17MyCharLower_Asciiw(i32 noundef signext) #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z27StringsAreEqualNoCase_AsciiPKwPKc(ptr noundef %0, ptr noundef %1) #3 personality ptr @__gxx_personality_v0 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i8, align 1
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  br label %9

9:                                                ; preds = %40, %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds i32, ptr %10, i32 1
  store ptr %11, ptr %4, align 8, !tbaa !5
  %12 = load i32, ptr %10, align 4, !tbaa !9
  store i32 %12, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %7) #4
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = getelementptr inbounds i8, ptr %13, i32 1
  store ptr %14, ptr %5, align 8, !tbaa !5
  %15 = load i8, ptr %13, align 1, !tbaa !11
  store i8 %15, ptr %7, align 1, !tbaa !11
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = load i8, ptr %7, align 1, !tbaa !11
  %18 = zext i8 %17 to i32
  %19 = icmp ne i32 %16, %18
  br i1 %19, label %20, label %33

20:                                               ; preds = %9
  %21 = load i32, ptr %6, align 4, !tbaa !9
  %22 = icmp sgt i32 %21, 127
  br i1 %22, label %32, label %23

23:                                               ; preds = %20
  %24 = load i32, ptr %6, align 4, !tbaa !9
  %25 = invoke noundef signext i32 @_Z17MyCharLower_Asciiw(i32 noundef signext %24)
          to label %26 unwind label %43

26:                                               ; preds = %23
  %27 = load i8, ptr %7, align 1, !tbaa !11
  %28 = invoke noundef signext i8 @_Z17MyCharLower_Asciic(i8 noundef signext %27)
          to label %29 unwind label %43

29:                                               ; preds = %26
  %30 = zext i8 %28 to i32
  %31 = icmp ne i32 %25, %30
  br i1 %31, label %32, label %33

32:                                               ; preds = %29, %20
  store i1 false, ptr %3, align 1
  store i32 1, ptr %8, align 4
  br label %38

33:                                               ; preds = %29, %9
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = icmp eq i32 %34, 0
  br i1 %35, label %36, label %37

36:                                               ; preds = %33
  store i1 true, ptr %3, align 1
  store i32 1, ptr %8, align 4
  br label %38

37:                                               ; preds = %33
  store i32 0, ptr %8, align 4
  br label %38

38:                                               ; preds = %37, %36, %32
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  %39 = load i32, ptr %8, align 4
  switch i32 %39, label %46 [
    i32 0, label %40
    i32 1, label %41
  ]

40:                                               ; preds = %38
  br label %9, !llvm.loop !12

41:                                               ; preds = %38
  %42 = load i1, ptr %3, align 1
  ret i1 %42

43:                                               ; preds = %26, %23
  %44 = landingpad { ptr, i32 }
          catch ptr null
  %45 = extractvalue { ptr, i32 } %44, 0
  call void @__clang_call_terminate(ptr %45) #5
  unreachable

46:                                               ; preds = %38
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint mustprogress 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 = { noinline noreturn nounwind uwtable "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 #3 = { mustprogress 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 #4 = { nounwind }
attributes #5 = { noreturn 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"wchar_t", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef signext i8 @_Z17MyCharLower_Asciic(i8 noundef signext) local_unnamed_addr #0

declare i32 @__gxx_personality_v0(...)

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef signext i32 @_Z17MyCharLower_Asciiw(i32 noundef signext) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z27StringsAreEqualNoCase_AsciiPKwPKc(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  br label %3

3:                                                ; preds = %15, %2
  %.011 = phi ptr [ %1, %2 ], [ %6, %15 ]
  %.010 = phi ptr [ %0, %2 ], [ %4, %15 ]
  %4 = getelementptr inbounds i8, ptr %.010, i64 4
  %5 = load i32, ptr %.010, align 4, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %.011, i64 1
  %7 = load i8, ptr %.011, align 1, !tbaa !9
  %8 = zext i8 %7 to i32
  %.not = icmp eq i32 %5, %8
  br i1 %.not, label %15, label %9

9:                                                ; preds = %3
  %10 = icmp sgt i32 %5, 127
  br i1 %10, label %.thread, label %11

11:                                               ; preds = %9
  %12 = tail call noundef signext i32 @_Z17MyCharLower_Asciiw(i32 noundef signext %5)
  %13 = tail call noundef signext i8 @_Z17MyCharLower_Asciic(i8 noundef signext %7)
  %14 = zext i8 %13 to i32
  %.not13 = icmp eq i32 %12, %14
  br i1 %.not13, label %15, label %.thread

15:                                               ; preds = %3, %11
  %.not18 = icmp eq i32 %5, 0
  br i1 %.not18, label %.thread, label %3

.thread:                                          ; preds = %9, %11, %15
  %.117 = phi i1 [ true, %15 ], [ false, %11 ], [ false, %9 ]
  ret i1 %.117
}

attributes #0 = { inlinehint mustprogress 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 #1 = { mustprogress 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" }

!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 = !{!"wchar_t", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!7, !7, i64 0}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass