; LLVM IR from 6leetcode/6leetcode :: questions/Algorithms/0014. Longest Common Prefix (Testing)

; 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"

@__const.main.input1 = external hidden unnamed_addr constant [3 x ptr], align 16
@.str.4 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [12 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local ptr @longestCommonPrefix(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
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca [3 x ptr], align 16
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  %9 = alloca ptr, align 8
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 24, ptr %6) #5
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %6, ptr align 16 @__const.main.input1, i64 24, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 3, ptr %7, align 4, !tbaa !5
  %10 = getelementptr inbounds [3 x ptr], ptr %6, i64 0, i64 0
  %11 = load ptr, ptr %10, align 16, !tbaa !9
  %12 = call i32 (ptr, ...) @printf(ptr noundef @.str.4, ptr noundef %11)
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  store i64 1, ptr %8, align 8, !tbaa !11
  br label %13

13:                                               ; preds = %24, %2
  %14 = load i64, ptr %8, align 8, !tbaa !11
  %15 = load i32, ptr %7, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = icmp ult i64 %14, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  br label %27

19:                                               ; preds = %13
  %20 = load i64, ptr %8, align 8, !tbaa !11
  %21 = getelementptr inbounds [3 x ptr], ptr %6, i64 0, i64 %20
  %22 = load ptr, ptr %21, align 8, !tbaa !9
  %23 = call i32 (ptr, ...) @printf(ptr noundef @.str.5, ptr noundef %22)
  br label %24

24:                                               ; preds = %19
  %25 = load i64, ptr %8, align 8, !tbaa !11
  %26 = add i64 %25, 1
  store i64 %26, ptr %8, align 8, !tbaa !11
  br label %13, !llvm.loop !13

27:                                               ; preds = %18
  %28 = load i32, ptr %7, align 4, !tbaa !5
  %29 = call i32 (ptr, ...) @printf(ptr noundef @.str.6, i32 noundef %28)
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  %30 = getelementptr inbounds [3 x ptr], ptr %6, i64 0, i64 0
  %31 = load i32, ptr %7, align 4, !tbaa !5
  %32 = call ptr @longestCommonPrefix(ptr noundef %30, i32 noundef %31)
  store ptr %32, ptr %9, align 8, !tbaa !9
  %33 = load ptr, ptr %9, align 8, !tbaa !9
  %34 = call i32 (ptr, ...) @printf(ptr noundef @.str.7, ptr noundef %33)
  %35 = load ptr, ptr %9, align 8, !tbaa !9
  call void @free(ptr noundef %35) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 24, ptr %6) #5
  ret i32 0
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

declare i32 @printf(ptr noundef, ...) #3

; Function Attrs: nounwind
declare void @free(ptr noundef) #4

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 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { "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 "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 }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"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"

@__const.main.input1 = external hidden unnamed_addr constant [3 x ptr], align 16
@.str.4 = external hidden unnamed_addr constant [12 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [12 x i8], align 1

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

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

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

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readnone %1) local_unnamed_addr #0 {
  %3 = alloca [3 x ptr], align 16
  call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %3) #5
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(24) %3, ptr noundef nonnull align 16 dereferenceable(24) @__const.main.input1, i64 24, i1 false)
  %4 = load ptr, ptr %3, align 16, !tbaa !5
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4, ptr noundef %4)
  %6 = getelementptr inbounds i8, ptr %3, i64 8
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, ptr noundef %7)
  %9 = getelementptr inbounds i8, ptr %3, i64 16
  %10 = load ptr, ptr %9, align 16, !tbaa !5
  %11 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, ptr noundef %10)
  %12 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6, i32 noundef 3)
  %13 = call ptr @longestCommonPrefix(ptr noundef nonnull %3, i32 noundef 3)
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.7, ptr noundef %13)
  call void @free(ptr noundef %13) #5
  call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %3) #5
  ret i32 0
}

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

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

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #4

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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, 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 #5 = { 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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass