; LLVM IR from yourtion/LearningMasteringAlgorithms-C :: source (bit)

; 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: nounwind uwtable
declare dso_local i32 @bit_get(ptr noundef, i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
declare dso_local void @bit_set(ptr noundef, i32 noundef, i32 noundef) #0

; Function Attrs: nounwind uwtable
define dso_local void @bit_rot_left(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = icmp sgt i32 %11, 0
  br i1 %12, label %13, label %67

13:                                               ; preds = %3
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %63, %13
  %15 = load i32, ptr %10, align 4, !tbaa !9
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %18, label %66

18:                                               ; preds = %14
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %19

19:                                               ; preds = %55, %18
  %20 = load i32, ptr %9, align 4, !tbaa !9
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = sub nsw i32 %21, 1
  %23 = sdiv i32 %22, 8
  %24 = icmp sle i32 %20, %23
  br i1 %24, label %25, label %58

25:                                               ; preds = %19
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = load i32, ptr %9, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i8, ptr %26, i64 %28
  %30 = call i32 @bit_get(ptr noundef %29, i32 noundef 0)
  store i32 %30, ptr %8, align 4, !tbaa !9
  %31 = load i32, ptr %9, align 4, !tbaa !9
  %32 = icmp eq i32 %31, 0
  br i1 %32, label %33, label %35

33:                                               ; preds = %25
  %34 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %34, ptr %7, align 4, !tbaa !9
  br label %42

35:                                               ; preds = %25
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = load i32, ptr %9, align 4, !tbaa !9
  %38 = sub nsw i32 %37, 1
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds i8, ptr %36, i64 %39
  %41 = load i32, ptr %8, align 4, !tbaa !9
  call void @bit_set(ptr noundef %40, i32 noundef 7, i32 noundef %41)
  br label %42

42:                                               ; preds = %35, %33
  %43 = load ptr, ptr %4, align 8, !tbaa !5
  %44 = load i32, ptr %9, align 4, !tbaa !9
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds i8, ptr %43, i64 %45
  %47 = load i8, ptr %46, align 1, !tbaa !11
  %48 = zext i8 %47 to i32
  %49 = shl i32 %48, 1
  %50 = trunc i32 %49 to i8
  %51 = load ptr, ptr %4, align 8, !tbaa !5
  %52 = load i32, ptr %9, align 4, !tbaa !9
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds i8, ptr %51, i64 %53
  store i8 %50, ptr %54, align 1, !tbaa !11
  br label %55

55:                                               ; preds = %42
  %56 = load i32, ptr %9, align 4, !tbaa !9
  %57 = add nsw i32 %56, 1
  store i32 %57, ptr %9, align 4, !tbaa !9
  br label %19, !llvm.loop !12

58:                                               ; preds = %19
  %59 = load ptr, ptr %4, align 8, !tbaa !5
  %60 = load i32, ptr %5, align 4, !tbaa !9
  %61 = sub nsw i32 %60, 1
  %62 = load i32, ptr %7, align 4, !tbaa !9
  call void @bit_set(ptr noundef %59, i32 noundef %61, i32 noundef %62)
  br label %63

63:                                               ; preds = %58
  %64 = load i32, ptr %10, align 4, !tbaa !9
  %65 = add nsw i32 %64, 1
  store i32 %65, ptr %10, align 4, !tbaa !9
  br label %14, !llvm.loop !14

66:                                               ; preds = %14
  br label %67

67:                                               ; preds = %66, %3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret void
}

attributes #0 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"}
!14 = distinct !{!14, !13}


; 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: nounwind uwtable
declare dso_local i32 @bit_get(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @bit_set(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @bit_rot_left(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %1, 0
  %5 = icmp sgt i32 %2, 0
  %or.cond = and i1 %4, %5
  br i1 %or.cond, label %.preheader.lr.ph, label %.loopexit

.preheader.lr.ph:                                 ; preds = %3
  %6 = add nsw i32 %1, -1
  %7 = lshr i32 %6, 3
  %8 = add nuw nsw i32 %7, 1
  %wide.trip.count = zext nneg i32 %8 to i64
  %exitcond.peel.not = icmp ult i32 %1, 9
  br label %9

9:                                                ; preds = %.preheader.lr.ph, %.loopexit30
  %.027 = phi i32 [ 0, %.preheader.lr.ph ], [ %17, %.loopexit30 ]
  %10 = tail call i32 @bit_get(ptr noundef %0, i32 noundef 0)
  %.pre = load i8, ptr %0, align 1, !tbaa !5
  %11 = shl i8 %.pre, 1
  store i8 %11, ptr %0, align 1, !tbaa !5
  br i1 %exitcond.peel.not, label %.loopexit30, label %.peel.next

.peel.next:                                       ; preds = %9, %.peel.next
  %indvars.iv = phi i64 [ %indvars.iv.next, %.peel.next ], [ 1, %9 ]
  %12 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %13 = tail call i32 @bit_get(ptr noundef nonnull %12, i32 noundef 0)
  %14 = getelementptr i8, ptr %12, i64 -1
  tail call void @bit_set(ptr noundef %14, i32 noundef 7, i32 noundef %13)
  %15 = load i8, ptr %12, align 1, !tbaa !5
  %16 = shl i8 %15, 1
  store i8 %16, ptr %12, align 1, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit30, label %.peel.next, !llvm.loop !8

.loopexit30:                                      ; preds = %.peel.next, %9
  tail call void @bit_set(ptr noundef nonnull %0, i32 noundef %6, i32 noundef %10)
  %17 = add nuw nsw i32 %.027, 1
  %exitcond31.not = icmp eq i32 %17, %2
  br i1 %exitcond31.not, label %.loopexit, label %9, !llvm.loop !11

.loopexit:                                        ; preds = %.loopexit30, %3
  ret void
}

attributes #0 = { 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/C++ TBAA"}
!8 = distinct !{!8, !9, !10}
!9 = !{!"llvm.loop.mustprogress"}
!10 = !{!"llvm.loop.peeled.count", i32 1}
!11 = distinct !{!11, !9}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopFullUnrollPass,LoopInstSimplifyPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SCCPPass,SROAPass,SimplifyCFGPass,TailCallElimPass