; LLVM IR from ImChong/Practice_LeetCode_C :: F02_Programming_Topics/F01_Data_Structure/04_String/03_ReplaceSpace (main)

; 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
define dso_local ptr @pathEncryption(ptr noundef %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = call i64 @strlen(ptr noundef %6) #5
  %8 = trunc i64 %7 to i32
  store i32 %8, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %9 = load i32, ptr %3, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = mul i64 1, %10
  %12 = add i64 %11, 1
  %13 = call noalias ptr @malloc(i64 noundef %12) #6
  store ptr %13, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %43, %1
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = load i32, ptr %3, align 4, !tbaa !9
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  br label %46

19:                                               ; preds = %14
  %20 = load ptr, ptr %2, align 8, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds i8, ptr %20, i64 %22
  %24 = load i8, ptr %23, align 1, !tbaa !11
  %25 = sext i8 %24 to i32
  %26 = icmp eq i32 %25, 46
  br i1 %26, label %27, label %32

27:                                               ; preds = %19
  %28 = load ptr, ptr %4, align 8, !tbaa !5
  %29 = load i32, ptr %5, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i8, ptr %28, i64 %30
  store i8 32, ptr %31, align 1, !tbaa !11
  br label %42

32:                                               ; preds = %19
  %33 = load ptr, ptr %2, align 8, !tbaa !5
  %34 = load i32, ptr %5, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds i8, ptr %33, i64 %35
  %37 = load i8, ptr %36, align 1, !tbaa !11
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = load i32, ptr %5, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i8, ptr %38, i64 %40
  store i8 %37, ptr %41, align 1, !tbaa !11
  br label %42

42:                                               ; preds = %32, %27
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %5, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %5, align 4, !tbaa !9
  br label %14, !llvm.loop !12

46:                                               ; preds = %18
  %47 = load ptr, ptr %4, align 8, !tbaa !5
  %48 = load i32, ptr %3, align 4, !tbaa !9
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds i8, ptr %47, i64 %49
  store i8 0, ptr %50, align 1, !tbaa !11
  %51 = load ptr, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret ptr %51
}

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

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #2

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #3

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

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 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 #3 = { nounwind allocsize(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 = { nounwind willreturn memory(read) }
attributes #6 = { nounwind allocsize(0) }

!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"

; Function Attrs: nofree nounwind memory(write, argmem: read, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @pathEncryption(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #3
  %3 = trunc i64 %2 to i32
  %sext = shl i64 %2, 32
  %4 = ashr exact i64 %sext, 32
  %5 = add nsw i64 %4, 1
  %6 = tail call noalias ptr @malloc(i64 noundef %5) #4
  %7 = icmp sgt i32 %3, 0
  br i1 %7, label %iter.check, label %._crit_edge

iter.check:                                       ; preds = %1
  %wide.trip.count = and i64 %2, 2147483647
  %min.iters.check = icmp ult i64 %wide.trip.count, 8
  br i1 %min.iters.check, label %.lr.ph.preheader, label %vector.main.loop.iter.check

vector.main.loop.iter.check:                      ; preds = %iter.check
  %min.iters.check17 = icmp ult i64 %wide.trip.count, 32
  br i1 %min.iters.check17, label %vec.epilog.ph, label %vector.ph

vector.ph:                                        ; preds = %vector.main.loop.iter.check
  %n.mod.vf = and i64 %2, 31
  %n.vec = sub nsw i64 %wide.trip.count, %n.mod.vf
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %8 = getelementptr inbounds i8, ptr %0, i64 %index
  %9 = getelementptr inbounds i8, ptr %8, i64 16
  %wide.load = load <16 x i8>, ptr %8, align 1, !tbaa !5
  %wide.load18 = load <16 x i8>, ptr %9, align 1, !tbaa !5
  %10 = icmp eq <16 x i8> %wide.load, <i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46>
  %11 = icmp eq <16 x i8> %wide.load18, <i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46>
  %12 = select <16 x i1> %10, <16 x i8> <i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32>, <16 x i8> %wide.load
  %13 = select <16 x i1> %11, <16 x i8> <i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32>, <16 x i8> %wide.load18
  %14 = getelementptr inbounds i8, ptr %6, i64 %index
  %15 = getelementptr inbounds i8, ptr %14, i64 16
  store <16 x i8> %12, ptr %14, align 1
  store <16 x i8> %13, ptr %15, align 1
  %index.next = add nuw i64 %index, 32
  %16 = icmp eq i64 %index.next, %n.vec
  br i1 %16, label %middle.block, label %vector.body, !llvm.loop !8

middle.block:                                     ; preds = %vector.body
  %cmp.n = icmp eq i64 %n.mod.vf, 0
  br i1 %cmp.n, label %._crit_edge, label %vec.epilog.iter.check

vec.epilog.iter.check:                            ; preds = %middle.block
  %min.epilog.iters.check = icmp ult i64 %n.mod.vf, 8
  br i1 %min.epilog.iters.check, label %.lr.ph.preheader, label %vec.epilog.ph

.lr.ph.preheader:                                 ; preds = %vec.epilog.middle.block, %iter.check, %vec.epilog.iter.check
  %indvars.iv.ph = phi i64 [ 0, %iter.check ], [ %n.vec, %vec.epilog.iter.check ], [ %n.vec20, %vec.epilog.middle.block ]
  br label %.lr.ph

vec.epilog.ph:                                    ; preds = %vector.main.loop.iter.check, %vec.epilog.iter.check
  %vec.epilog.resume.val = phi i64 [ %n.vec, %vec.epilog.iter.check ], [ 0, %vector.main.loop.iter.check ]
  %n.mod.vf19 = and i64 %2, 7
  %n.vec20 = sub nsw i64 %wide.trip.count, %n.mod.vf19
  br label %vec.epilog.vector.body

vec.epilog.vector.body:                           ; preds = %vec.epilog.vector.body, %vec.epilog.ph
  %index21 = phi i64 [ %vec.epilog.resume.val, %vec.epilog.ph ], [ %index.next23, %vec.epilog.vector.body ]
  %17 = getelementptr inbounds i8, ptr %0, i64 %index21
  %wide.load22 = load <8 x i8>, ptr %17, align 1, !tbaa !5
  %18 = icmp eq <8 x i8> %wide.load22, <i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46, i8 46>
  %19 = select <8 x i1> %18, <8 x i8> <i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32, i8 32>, <8 x i8> %wide.load22
  %20 = getelementptr inbounds i8, ptr %6, i64 %index21
  store <8 x i8> %19, ptr %20, align 1
  %index.next23 = add nuw i64 %index21, 8
  %21 = icmp eq i64 %index.next23, %n.vec20
  br i1 %21, label %vec.epilog.middle.block, label %vec.epilog.vector.body, !llvm.loop !12

vec.epilog.middle.block:                          ; preds = %vec.epilog.vector.body
  %cmp.n24 = icmp eq i64 %n.mod.vf19, 0
  br i1 %cmp.n24, label %._crit_edge, label %.lr.ph.preheader

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %vec.epilog.middle.block, %1
  %22 = getelementptr inbounds i8, ptr %6, i64 %4
  store i8 0, ptr %22, align 1, !tbaa !5
  ret ptr %6

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %indvars.iv.ph, %.lr.ph.preheader ]
  %23 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %24 = load i8, ptr %23, align 1, !tbaa !5
  %25 = icmp eq i8 %24, 46
  %spec.select = select i1 %25, i8 32, i8 %24
  %26 = getelementptr inbounds i8, ptr %6, i64 %indvars.iv
  store i8 %spec.select, ptr %26, align 1
  %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 %._crit_edge, label %.lr.ph, !llvm.loop !13
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #2

attributes #0 = { nofree nounwind memory(write, argmem: read, inaccessiblemem: readwrite) 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 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 #2 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 willreturn memory(read) }
attributes #4 = { nounwind allocsize(0) }

!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, !11}
!9 = !{!"llvm.loop.mustprogress"}
!10 = !{!"llvm.loop.isvectorized", i32 1}
!11 = !{!"llvm.loop.unroll.runtime.disable"}
!12 = distinct !{!12, !9, !10, !11}
!13 = distinct !{!13, !9, !11, !10}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,MergedLoadStoreMotionPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass