; LLVM IR from kenjin/Awesome-LC-C-Cracker :: leetcode-c-sol/2864_maximum-odd-binary-number (2864_maximum-odd-binary-number)

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

6:                                                ; preds = %24, %1
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = load i32, ptr %4, align 4, !tbaa !9
  %9 = sext i32 %8 to i64
  %10 = getelementptr inbounds i8, ptr %7, i64 %9
  %11 = load i8, ptr %10, align 1, !tbaa !11
  %12 = icmp ne i8 %11, 0
  br i1 %12, label %13, label %30

13:                                               ; preds = %6
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds i8, ptr %14, i64 %16
  %18 = load i8, ptr %17, align 1, !tbaa !11
  %19 = sext i8 %18 to i32
  %20 = icmp eq i32 %19, 49
  br i1 %20, label %21, label %24

21:                                               ; preds = %13
  %22 = load i32, ptr %3, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  store i32 %23, ptr %3, align 4, !tbaa !9
  br label %24

24:                                               ; preds = %21, %13
  %25 = load ptr, ptr %2, align 8, !tbaa !5
  %26 = load i32, ptr %4, align 4, !tbaa !9
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %4, align 4, !tbaa !9
  %28 = sext i32 %26 to i64
  %29 = getelementptr inbounds i8, ptr %25, i64 %28
  store i8 48, ptr %29, align 1, !tbaa !11
  br label %6, !llvm.loop !12

30:                                               ; preds = %6
  %31 = load ptr, ptr %2, align 8, !tbaa !5
  %32 = load i32, ptr %4, align 4, !tbaa !9
  %33 = sub nsw i32 %32, 1
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds i8, ptr %31, i64 %34
  store i8 49, ptr %35, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %36

36:                                               ; preds = %39, %30
  %37 = load i32, ptr %3, align 4, !tbaa !9
  %38 = icmp sgt i32 %37, 1
  br i1 %38, label %39, label %47

39:                                               ; preds = %36
  %40 = load ptr, ptr %2, align 8, !tbaa !5
  %41 = load i32, ptr %5, align 4, !tbaa !9
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %5, align 4, !tbaa !9
  %43 = sext i32 %41 to i64
  %44 = getelementptr inbounds i8, ptr %40, i64 %43
  store i8 49, ptr %44, align 1, !tbaa !11
  %45 = load i32, ptr %3, align 4, !tbaa !9
  %46 = add nsw i32 %45, -1
  store i32 %46, ptr %3, align 4, !tbaa !9
  br label %36, !llvm.loop !14

47:                                               ; preds = %36
  %48 = load ptr, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret ptr %48
}

; 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

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: nofree norecurse nosync nounwind memory(argmem: readwrite) uwtable
define dso_local noundef ptr @maximumOddBinaryNumber(ptr noundef returned %0) local_unnamed_addr #0 {
  br label %2

2:                                                ; preds = %7, %1
  %indvars.iv = phi i64 [ %indvars.iv.next, %7 ], [ 0, %1 ]
  %.014 = phi i32 [ %.1, %7 ], [ 0, %1 ]
  %3 = getelementptr inbounds i8, ptr %0, i64 %indvars.iv
  %4 = load i8, ptr %3, align 1, !tbaa !5
  switch i8 %4, label %7 [
    i8 0, label %8
    i8 49, label %5
  ]

5:                                                ; preds = %2
  %6 = add nsw i32 %.014, 1
  br label %7

7:                                                ; preds = %2, %5
  %.1 = phi i32 [ %6, %5 ], [ %.014, %2 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  store i8 48, ptr %3, align 1, !tbaa !5
  br label %2, !llvm.loop !8

8:                                                ; preds = %2
  %9 = getelementptr i8, ptr %3, i64 -1
  store i8 49, ptr %9, align 1, !tbaa !5
  %10 = icmp sgt i32 %.014, 1
  br i1 %10, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %8
  %11 = add nsw i32 %.014, -1
  %12 = zext nneg i32 %11 to i64
  tail call void @llvm.memset.p0.i64(ptr nonnull align 1 %0, i8 49, i64 %12, i1 false), !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %8
  ret ptr %0
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #1

attributes #0 = { nofree norecurse nosync nounwind memory(argmem: 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 = { nocallback nofree nounwind willreturn memory(argmem: write) }

!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: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass