; LLVM IR from ahampriyanshu/algo-ds-101 :: Algorithms/String/Palindrome (Palindrome)

; 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.inputs = external hidden unnamed_addr constant [11 x [11 x i8]], align 16
@.str = external hidden unnamed_addr constant [25 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 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 [11 x [11 x i8]], align 16
  %7 = alloca i32, align 4
  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 121, ptr %6) #4
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %6, ptr align 16 @__const.main.inputs, i64 121, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %26, %2
  %9 = load i32, ptr %7, align 4, !tbaa !5
  %10 = icmp slt i32 %9, 11
  br i1 %10, label %12, label %11

11:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %29

12:                                               ; preds = %8
  %13 = load i32, ptr %7, align 4, !tbaa !5
  %14 = sext i32 %13 to i64
  %15 = getelementptr inbounds [11 x [11 x i8]], ptr %6, i64 0, i64 %14
  %16 = getelementptr inbounds [11 x i8], ptr %15, i64 0, i64 0
  %17 = load i32, ptr %7, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [11 x [11 x i8]], ptr %6, i64 0, i64 %18
  %20 = getelementptr inbounds [11 x i8], ptr %19, i64 0, i64 0
  %21 = call i32 @is_palindrome(ptr noundef %20)
  %22 = icmp ne i32 %21, 0
  %23 = zext i1 %22 to i64
  %24 = select i1 %22, ptr @.str.1, ptr @.str.2
  %25 = call i32 (ptr, ...) @printf(ptr noundef @.str, ptr noundef %16, ptr noundef %24)
  br label %26

26:                                               ; preds = %12
  %27 = load i32, ptr %7, align 4, !tbaa !5
  %28 = add nsw i32 %27, 1
  store i32 %28, ptr %7, align 4, !tbaa !5
  br label %8, !llvm.loop !11

29:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 121, ptr %6) #4
  ret i32 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 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 uwtable
declare dso_local i32 @is_palindrome(ptr noundef) #0

; 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 = { 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 }

!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 = distinct !{!11, !12}
!12 = !{!"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.inputs = external hidden unnamed_addr constant [11 x [11 x i8]], align 16
@.str = external hidden unnamed_addr constant [25 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 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 [11 x [11 x i8]], align 16
  call void @llvm.lifetime.start.p0(i64 121, ptr nonnull %3) #4
  call void @llvm.memcpy.p0.p0.i64(ptr noundef nonnull align 16 dereferenceable(121) %3, ptr noundef nonnull align 16 dereferenceable(121) @__const.main.inputs, i64 121, i1 false)
  %4 = call i32 @is_palindrome(ptr noundef nonnull %3)
  %.not = icmp eq i32 %4, 0
  %5 = select i1 %.not, ptr @.str.2, ptr @.str.1
  %6 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %3, ptr noundef nonnull %5)
  %7 = getelementptr inbounds i8, ptr %3, i64 11
  %8 = call i32 @is_palindrome(ptr noundef nonnull %7)
  %.not.1 = icmp eq i32 %8, 0
  %9 = select i1 %.not.1, ptr @.str.2, ptr @.str.1
  %10 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %7, ptr noundef nonnull %9)
  %11 = getelementptr inbounds i8, ptr %3, i64 22
  %12 = call i32 @is_palindrome(ptr noundef nonnull %11)
  %.not.2 = icmp eq i32 %12, 0
  %13 = select i1 %.not.2, ptr @.str.2, ptr @.str.1
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %11, ptr noundef nonnull %13)
  %15 = getelementptr inbounds i8, ptr %3, i64 33
  %16 = call i32 @is_palindrome(ptr noundef nonnull %15)
  %.not.3 = icmp eq i32 %16, 0
  %17 = select i1 %.not.3, ptr @.str.2, ptr @.str.1
  %18 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %15, ptr noundef nonnull %17)
  %19 = getelementptr inbounds i8, ptr %3, i64 44
  %20 = call i32 @is_palindrome(ptr noundef nonnull %19)
  %.not.4 = icmp eq i32 %20, 0
  %21 = select i1 %.not.4, ptr @.str.2, ptr @.str.1
  %22 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %19, ptr noundef nonnull %21)
  %23 = getelementptr inbounds i8, ptr %3, i64 55
  %24 = call i32 @is_palindrome(ptr noundef nonnull %23)
  %.not.5 = icmp eq i32 %24, 0
  %25 = select i1 %.not.5, ptr @.str.2, ptr @.str.1
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %23, ptr noundef nonnull %25)
  %27 = getelementptr inbounds i8, ptr %3, i64 66
  %28 = call i32 @is_palindrome(ptr noundef nonnull %27)
  %.not.6 = icmp eq i32 %28, 0
  %29 = select i1 %.not.6, ptr @.str.2, ptr @.str.1
  %30 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %27, ptr noundef nonnull %29)
  %31 = getelementptr inbounds i8, ptr %3, i64 77
  %32 = call i32 @is_palindrome(ptr noundef nonnull %31)
  %.not.7 = icmp eq i32 %32, 0
  %33 = select i1 %.not.7, ptr @.str.2, ptr @.str.1
  %34 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %31, ptr noundef nonnull %33)
  %35 = getelementptr inbounds i8, ptr %3, i64 88
  %36 = call i32 @is_palindrome(ptr noundef nonnull %35)
  %.not.8 = icmp eq i32 %36, 0
  %37 = select i1 %.not.8, ptr @.str.2, ptr @.str.1
  %38 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %35, ptr noundef nonnull %37)
  %39 = getelementptr inbounds i8, ptr %3, i64 99
  %40 = call i32 @is_palindrome(ptr noundef nonnull %39)
  %.not.9 = icmp eq i32 %40, 0
  %41 = select i1 %.not.9, ptr @.str.2, ptr @.str.1
  %42 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %39, ptr noundef nonnull %41)
  %43 = getelementptr inbounds i8, ptr %3, i64 110
  %44 = call i32 @is_palindrome(ptr noundef nonnull %43)
  %.not.10 = icmp eq i32 %44, 0
  %45 = select i1 %.not.10, ptr @.str.2, ptr @.str.1
  %46 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef nonnull %43, ptr noundef nonnull %45)
  call void @llvm.lifetime.end.p0(i64 121, ptr nonnull %3) #4
  ret i32 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 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: nounwind uwtable
declare dso_local i32 @is_palindrome(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress 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 = { 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 = { 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)"}


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