; LLVM IR from jspd-group/pegit :: src (strbuf)

; 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 willreturn memory(read)
declare i32 @memcmp(ptr noundef, ptr noundef, i64 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @inplace_compare(ptr noundef %0, ptr noundef %1, i64 noundef %2, i64 noundef %3) #2 {
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store ptr %1, ptr %7, align 8, !tbaa !5
  store i64 %2, ptr %8, align 8, !tbaa !9
  store i64 %3, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %13 = load i64, ptr %8, align 8, !tbaa !9
  %14 = load i64, ptr %9, align 8, !tbaa !9
  %15 = icmp ult i64 %13, %14
  br i1 %15, label %16, label %18

16:                                               ; preds = %4
  %17 = load i64, ptr %8, align 8, !tbaa !9
  br label %20

18:                                               ; preds = %4
  %19 = load i64, ptr %9, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %18, %16
  %21 = phi i64 [ %17, %16 ], [ %19, %18 ]
  %22 = trunc i64 %21 to i32
  store i32 %22, ptr %10, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %23 = load ptr, ptr %6, align 8, !tbaa !5
  %24 = load ptr, ptr %7, align 8, !tbaa !5
  %25 = load i32, ptr %10, align 4, !tbaa !11
  %26 = sext i32 %25 to i64
  %27 = call i32 @memcmp(ptr noundef %23, ptr noundef %24, i64 noundef %26) #4
  store i32 %27, ptr %11, align 4, !tbaa !11
  %28 = load i32, ptr %11, align 4, !tbaa !11
  %29 = icmp ne i32 %28, 0
  br i1 %29, label %30, label %32

30:                                               ; preds = %20
  %31 = load i32, ptr %11, align 4, !tbaa !11
  store i32 %31, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %44

32:                                               ; preds = %20
  %33 = load i64, ptr %8, align 8, !tbaa !9
  %34 = load i64, ptr %9, align 8, !tbaa !9
  %35 = icmp ult i64 %33, %34
  br i1 %35, label %36, label %37

36:                                               ; preds = %32
  br label %42

37:                                               ; preds = %32
  %38 = load i64, ptr %8, align 8, !tbaa !9
  %39 = load i64, ptr %9, align 8, !tbaa !9
  %40 = icmp ne i64 %38, %39
  %41 = zext i1 %40 to i32
  br label %42

42:                                               ; preds = %37, %36
  %43 = phi i32 [ -1, %36 ], [ %41, %37 ]
  store i32 %43, ptr %5, align 4
  store i32 1, ptr %12, align 4
  br label %44

44:                                               ; preds = %42, %30
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  %45 = load i32, ptr %5, align 4
  ret i32 %45
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind willreturn memory(read) "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 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 #3 = { nounwind }
attributes #4 = { nounwind willreturn memory(read) }

!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}


; 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: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i32 @memcmp(ptr nocapture noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read) uwtable
define dso_local i32 @inplace_compare(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1, i64 noundef %2, i64 noundef %3) local_unnamed_addr #1 {
  %5 = tail call i64 @llvm.umin.i64(i64 %2, i64 %3)
  %sext = shl i64 %5, 32
  %6 = ashr exact i64 %sext, 32
  %7 = tail call i32 @memcmp(ptr noundef %0, ptr noundef %1, i64 noundef %6) #3
  %.not = icmp eq i32 %7, 0
  %8 = icmp ult i64 %2, %3
  %9 = icmp ne i64 %2, %3
  %10 = zext i1 %9 to i32
  %11 = select i1 %8, i32 -1, i32 %10
  %.0 = select i1 %.not, i32 %11, i32 %7
  ret i32 %.0
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #2

attributes #0 = { mustprogress nofree nounwind willreturn memory(argmem: read) "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 nofree nounwind willreturn 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" }
attributes #2 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #3 = { nounwind willreturn memory(read) }

!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)"}


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