; LLVM IR from JessonYue/LeetCodeLearning :: Array/yangxin/第六周练习7_6-7_12/计算一个数字1的个数_函数指针demo_将字符串反转 (num1Size)

; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1

; 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 void @reversalStr(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i8, align 1
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  %9 = load ptr, ptr %2, align 8, !tbaa !5
  %10 = call i64 @strlen(ptr noundef %9) #6
  %11 = trunc i64 %10 to i32
  store i32 %11, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  %12 = load i32, ptr %3, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = call noalias ptr @calloc(i64 noundef %13, i64 noundef 1) #7
  store ptr %14, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %15

15:                                               ; preds = %23, %1
  %16 = load ptr, ptr %2, align 8, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds i8, ptr %16, i64 %18
  %20 = load i8, ptr %19, align 1, !tbaa !11
  %21 = sext i8 %20 to i32
  %22 = icmp ne i32 %21, 0
  br i1 %22, label %23, label %35

23:                                               ; preds = %15
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = load i32, ptr %5, align 4, !tbaa !9
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds i8, ptr %24, i64 %26
  %28 = load i8, ptr %27, align 1, !tbaa !11
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = load i32, ptr %5, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds i8, ptr %29, i64 %31
  store i8 %28, ptr %32, align 1, !tbaa !11
  %33 = load i32, ptr %5, align 4, !tbaa !9
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %5, align 4, !tbaa !9
  br label %15, !llvm.loop !12

35:                                               ; preds = %15
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 0, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  %36 = load i32, ptr %3, align 4, !tbaa !9
  %37 = sub nsw i32 %36, 1
  store i32 %37, ptr %7, align 4, !tbaa !9
  br label %38

38:                                               ; preds = %42, %35
  %39 = load i32, ptr %6, align 4, !tbaa !9
  %40 = load i32, ptr %7, align 4, !tbaa !9
  %41 = icmp slt i32 %39, %40
  br i1 %41, label %42, label %66

42:                                               ; preds = %38
  call void @llvm.lifetime.start.p0(i64 1, ptr %8) #5
  %43 = load ptr, ptr %4, align 8, !tbaa !5
  %44 = load i32, ptr %6, 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
  store i8 %47, ptr %8, align 1, !tbaa !11
  %48 = load ptr, ptr %4, align 8, !tbaa !5
  %49 = load i32, ptr %7, align 4, !tbaa !9
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds i8, ptr %48, i64 %50
  %52 = load i8, ptr %51, align 1, !tbaa !11
  %53 = load ptr, ptr %4, align 8, !tbaa !5
  %54 = load i32, ptr %6, align 4, !tbaa !9
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds i8, ptr %53, i64 %55
  store i8 %52, ptr %56, align 1, !tbaa !11
  %57 = load i8, ptr %8, align 1, !tbaa !11
  %58 = load ptr, ptr %4, align 8, !tbaa !5
  %59 = load i32, ptr %7, align 4, !tbaa !9
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds i8, ptr %58, i64 %60
  store i8 %57, ptr %61, align 1, !tbaa !11
  %62 = load i32, ptr %6, align 4, !tbaa !9
  %63 = add nsw i32 %62, 1
  store i32 %63, ptr %6, align 4, !tbaa !9
  %64 = load i32, ptr %7, align 4, !tbaa !9
  %65 = add nsw i32 %64, -1
  store i32 %65, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 1, ptr %8) #5
  br label %38, !llvm.loop !14

66:                                               ; preds = %38
  %67 = load ptr, ptr %4, align 8, !tbaa !5
  %68 = call i32 (ptr, ...) @printf(ptr noundef @.str, ptr noundef %67)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  ret void
}

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

; Function Attrs: nounwind allocsize(0,1)
declare noalias ptr @calloc(i64 noundef, i64 noundef) #3

declare i32 @printf(ptr noundef, ...) #4

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 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(0,1) "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 = { "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 #5 = { nounwind }
attributes #6 = { nounwind willreturn memory(read) }
attributes #7 = { nounwind allocsize(0,1) }

!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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: nofree nounwind uwtable
define dso_local void @reversalStr(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #4
  %3 = trunc i64 %2 to i32
  %sext = shl i64 %2, 32
  %4 = ashr exact i64 %sext, 32
  %5 = tail call noalias ptr @calloc(i64 noundef %4, i64 noundef 1) #5
  %6 = load i8, ptr %0, align 1, !tbaa !5
  %.not25 = icmp eq i8 %6, 0
  br i1 %.not25, label %.preheader, label %.lr.ph

.preheader:                                       ; preds = %.lr.ph, %1
  %7 = icmp sgt i32 %3, 1
  br i1 %7, label %.lr.ph30.preheader, label %._crit_edge

.lr.ph30.preheader:                               ; preds = %.preheader
  %8 = and i64 %2, 2147483647
  %9 = add nsw i64 %8, -1
  br label %.lr.ph30

.lr.ph:                                           ; preds = %1, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %1 ]
  %10 = phi i8 [ %13, %.lr.ph ], [ %6, %1 ]
  %11 = getelementptr inbounds i8, ptr %5, i64 %indvars.iv
  store i8 %10, ptr %11, align 1, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %12 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv.next
  %13 = load i8, ptr %12, align 1, !tbaa !5
  %.not = icmp eq i8 %13, 0
  br i1 %.not, label %.preheader, label %.lr.ph, !llvm.loop !8

.lr.ph30:                                         ; preds = %.lr.ph30.preheader, %.lr.ph30
  %indvars.iv33 = phi i64 [ 0, %.lr.ph30.preheader ], [ %indvars.iv.next34, %.lr.ph30 ]
  %indvars.iv31 = phi i64 [ %9, %.lr.ph30.preheader ], [ %indvars.iv.next32, %.lr.ph30 ]
  %14 = getelementptr inbounds i8, ptr %5, i64 %indvars.iv33
  %15 = load i8, ptr %14, align 1, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %5, i64 %indvars.iv31
  %17 = load i8, ptr %16, align 1, !tbaa !5
  store i8 %17, ptr %14, align 1, !tbaa !5
  store i8 %15, ptr %16, align 1, !tbaa !5
  %indvars.iv.next34 = add nuw nsw i64 %indvars.iv33, 1
  %indvars.iv.next32 = add nsw i64 %indvars.iv31, -1
  %18 = icmp slt i64 %indvars.iv.next34, %indvars.iv.next32
  br i1 %18, label %.lr.ph30, label %._crit_edge, !llvm.loop !10

._crit_edge:                                      ; preds = %.lr.ph30, %.preheader
  %19 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef %5)
  ret void
}

; 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,zeroed") allocsize(0,1) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @calloc(i64 noundef, i64 noundef) local_unnamed_addr #2

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

attributes #0 = { nofree 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 = { 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,zeroed") allocsize(0,1) 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 = { nofree nounwind "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 willreturn memory(read) }
attributes #5 = { nounwind allocsize(0,1) }

!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"}
!10 = distinct !{!10, !9}


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