; LLVM IR from likle/cwalk :: src (cwalk)

; 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"

@path_style = external hidden global i32, align 4
@separators = external hidden global [2 x ptr], align 16

; 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 zeroext i1 @cwk_path_is_separator(ptr noundef %0) #1 {
  %2 = alloca i1, align 1
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  %6 = load i32, ptr @path_style, align 4, !tbaa !9
  %7 = zext i32 %6 to i64
  %8 = getelementptr inbounds [2 x ptr], ptr @separators, i64 0, i64 %7
  %9 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %9, ptr %4, align 8, !tbaa !5
  br label %10

10:                                               ; preds = %23, %1
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = load i8, ptr %11, align 1, !tbaa !11
  %13 = icmp ne i8 %12, 0
  br i1 %13, label %14, label %26

14:                                               ; preds = %10
  %15 = load ptr, ptr %4, align 8, !tbaa !5
  %16 = load i8, ptr %15, align 1, !tbaa !11
  %17 = sext i8 %16 to i32
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = load i8, ptr %18, align 1, !tbaa !11
  %20 = sext i8 %19 to i32
  %21 = icmp eq i32 %17, %20
  br i1 %21, label %22, label %23

22:                                               ; preds = %14
  store i1 true, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %27

23:                                               ; preds = %14
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = getelementptr inbounds i8, ptr %24, i32 1
  store ptr %25, ptr %4, align 8, !tbaa !5
  br label %10, !llvm.loop !12

26:                                               ; preds = %10
  store i1 false, ptr %2, align 1
  store i32 1, ptr %5, align 4
  br label %27

27:                                               ; preds = %26, %22
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %28 = load i1, ptr %2, align 1
  ret i1 %28
}

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 = !{!"int", !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"

@path_style = external hidden local_unnamed_addr global i32, align 4
@separators = external hidden local_unnamed_addr global [2 x ptr], align 16

; Function Attrs: nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) uwtable
define dso_local noundef zeroext i1 @cwk_path_is_separator(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @path_style, align 4, !tbaa !5
  %3 = zext i32 %2 to i64
  %4 = getelementptr inbounds [2 x ptr], ptr @separators, i64 0, i64 %3
  %5 = load ptr, ptr %4, align 8, !tbaa !9
  %6 = load i8, ptr %5, align 1, !tbaa !11
  %.not7.not = icmp eq i8 %6, 0
  br i1 %.not7.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %7 = load i8, ptr %0, align 1, !tbaa !11
  br label %11

8:                                                ; preds = %11
  %9 = getelementptr inbounds i8, ptr %.08, i64 1
  %10 = load i8, ptr %9, align 1, !tbaa !11
  %.not.not = icmp eq i8 %10, 0
  br i1 %.not.not, label %._crit_edge, label %11, !llvm.loop !12

11:                                               ; preds = %.lr.ph, %8
  %12 = phi i8 [ %6, %.lr.ph ], [ %10, %8 ]
  %.08 = phi ptr [ %5, %.lr.ph ], [ %9, %8 ]
  %13 = icmp eq i8 %12, %7
  br i1 %13, label %._crit_edge, label %8

._crit_edge:                                      ; preds = %11, %8, %1
  %.not.lcssa = phi i1 [ false, %1 ], [ %13, %8 ], [ %13, %11 ]
  ret i1 %.not.lcssa
}

attributes #0 = { nofree norecurse nosync nounwind memory(read, inaccessiblemem: none) 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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