; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/CPP/Common/MyString.ll (Z27StringsAreEqualNoCase_AsciiPKcS0_)

; 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: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z27StringsAreEqualNoCase_AsciiPKcS0_(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 i8, align 1
  %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 1, ptr %6) #4
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds i8, ptr %10, i32 1
  store ptr %11, ptr %4, align 8, !tbaa !5
  %12 = load i8, ptr %10, align 1, !tbaa !9
  store i8 %12, ptr %6, align 1, !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 !9
  store i8 %15, ptr %7, align 1, !tbaa !9
  %16 = load i8, ptr %6, align 1, !tbaa !9
  %17 = sext i8 %16 to i32
  %18 = load i8, ptr %7, align 1, !tbaa !9
  %19 = sext i8 %18 to i32
  %20 = icmp ne i32 %17, %19
  br i1 %20, label %21, label %32

21:                                               ; preds = %9
  %22 = load i8, ptr %6, align 1, !tbaa !9
  %23 = invoke noundef signext i8 @_Z17MyCharLower_Asciic(i8 noundef signext %22)
          to label %24 unwind label %43

24:                                               ; preds = %21
  %25 = sext i8 %23 to i32
  %26 = load i8, ptr %7, align 1, !tbaa !9
  %27 = invoke noundef signext i8 @_Z17MyCharLower_Asciic(i8 noundef signext %26)
          to label %28 unwind label %43

28:                                               ; preds = %24
  %29 = sext i8 %27 to i32
  %30 = icmp ne i32 %25, %29
  br i1 %30, label %31, label %32

31:                                               ; preds = %28
  store i1 false, ptr %3, align 1
  store i32 1, ptr %8, align 4
  br label %38

32:                                               ; preds = %28, %9
  %33 = load i8, ptr %6, align 1, !tbaa !9
  %34 = sext i8 %33 to i32
  %35 = icmp eq i32 %34, 0
  br i1 %35, label %36, label %37

36:                                               ; preds = %32
  store i1 true, ptr %3, align 1
  store i32 1, ptr %8, align 4
  br label %38

37:                                               ; preds = %32
  store i32 0, ptr %8, align 4
  br label %38

38:                                               ; preds = %37, %36, %31
  call void @llvm.lifetime.end.p0(i64 1, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 1, 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 !10

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

43:                                               ; preds = %24, %21
  %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 = !{!7, !7, i64 0}
!10 = distinct !{!10, !11}
!11 = !{!"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: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z27StringsAreEqualNoCase_AsciiPKcS0_(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  br label %3

3:                                                ; preds = %11, %2
  %.010 = phi ptr [ %1, %2 ], [ %6, %11 ]
  %.09 = phi ptr [ %0, %2 ], [ %4, %11 ]
  %4 = getelementptr inbounds i8, ptr %.09, i64 1
  %5 = load i8, ptr %.09, align 1, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %.010, i64 1
  %7 = load i8, ptr %.010, align 1, !tbaa !5
  %.not = icmp eq i8 %5, %7
  br i1 %.not, label %11, label %8

8:                                                ; preds = %3
  %9 = tail call noundef signext i8 @_Z17MyCharLower_Asciic(i8 noundef signext %5)
  %10 = tail call noundef signext i8 @_Z17MyCharLower_Asciic(i8 noundef signext %7)
  %.not11 = icmp eq i8 %9, %10
  br i1 %.not11, label %11, label %.thread

11:                                               ; preds = %3, %8
  %.not16 = icmp eq i8 %5, 0
  br i1 %.not16, label %.thread, label %3

.thread:                                          ; preds = %8, %11
  %.115 = phi i1 [ true, %11 ], [ false, %8 ]
  ret i1 %.115
}

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


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