; LLVM IR from yettabaa/cub3D :: Common/Libft (ft_strncmp)

; 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 @ft_strcmp(ptr noundef %0, ptr noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %8

8:                                                ; preds = %48, %2
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = load i64, ptr %6, align 8, !tbaa !9
  %11 = getelementptr inbounds i8, ptr %9, i64 %10
  %12 = load i8, ptr %11, align 1, !tbaa !11
  %13 = sext i8 %12 to i32
  %14 = icmp ne i32 %13, 0
  br i1 %14, label %22, label %15

15:                                               ; preds = %8
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load i64, ptr %6, align 8, !tbaa !9
  %18 = getelementptr inbounds i8, ptr %16, i64 %17
  %19 = load i8, ptr %18, align 1, !tbaa !11
  %20 = sext i8 %19 to i32
  %21 = icmp ne i32 %20, 0
  br label %22

22:                                               ; preds = %15, %8
  %23 = phi i1 [ true, %8 ], [ %21, %15 ]
  br i1 %23, label %24, label %51

24:                                               ; preds = %22
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load i64, ptr %6, align 8, !tbaa !9
  %27 = getelementptr inbounds i8, ptr %25, i64 %26
  %28 = load i8, ptr %27, align 1, !tbaa !11
  %29 = zext i8 %28 to i32
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = load i64, ptr %6, align 8, !tbaa !9
  %32 = getelementptr inbounds i8, ptr %30, i64 %31
  %33 = load i8, ptr %32, align 1, !tbaa !11
  %34 = zext i8 %33 to i32
  %35 = icmp ne i32 %29, %34
  br i1 %35, label %36, label %48

36:                                               ; preds = %24
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = load i64, ptr %6, align 8, !tbaa !9
  %39 = getelementptr inbounds i8, ptr %37, i64 %38
  %40 = load i8, ptr %39, align 1, !tbaa !11
  %41 = zext i8 %40 to i32
  %42 = load ptr, ptr %5, align 8, !tbaa !5
  %43 = load i64, ptr %6, align 8, !tbaa !9
  %44 = getelementptr inbounds i8, ptr %42, i64 %43
  %45 = load i8, ptr %44, align 1, !tbaa !11
  %46 = zext i8 %45 to i32
  %47 = sub nsw i32 %41, %46
  store i32 %47, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %52

48:                                               ; preds = %24
  %49 = load i64, ptr %6, align 8, !tbaa !9
  %50 = add i64 %49, 1
  store i64 %50, ptr %6, align 8, !tbaa !9
  br label %8, !llvm.loop !12

51:                                               ; preds = %22
  store i32 0, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %52

52:                                               ; preds = %51, %36
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  %53 = load i32, ptr %3, align 4
  ret i32 %53
}

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 = !{!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: nofree norecurse nosync nounwind memory(argmem: read) uwtable
define dso_local range(i32 -255, 256) i32 @ft_strcmp(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  br label %3

3:                                                ; preds = %.critedge, %2
  %.0 = phi i64 [ 0, %2 ], [ %8, %.critedge ]
  %4 = getelementptr inbounds i8, ptr %0, i64 %.0
  %5 = load i8, ptr %4, align 1, !tbaa !5
  %.not = icmp eq i8 %5, 0
  %6 = getelementptr inbounds i8, ptr %1, i64 %.0
  %7 = load i8, ptr %6, align 1, !tbaa !5
  %.not16 = icmp eq i8 %7, 0
  %or.cond = select i1 %.not, i1 %.not16, i1 false
  br i1 %or.cond, label %.loopexit, label %.critedge

.critedge:                                        ; preds = %3
  %.not17 = icmp eq i8 %5, %7
  %8 = add i64 %.0, 1
  br i1 %.not17, label %3, label %9, !llvm.loop !8

9:                                                ; preds = %.critedge
  %10 = zext i8 %7 to i32
  %11 = zext i8 %5 to i32
  %12 = sub nsw i32 %11, %10
  br label %.loopexit

.loopexit:                                        ; preds = %3, %9
  %.013 = phi i32 [ %12, %9 ], [ 0, %3 ]
  ret i32 %.013
}

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 = !{!6, !6, i64 0}
!6 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = distinct !{!8, !9}
!9 = !{!"llvm.loop.mustprogress"}


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