; LLVM IR from gzc/CLRS :: C32-String-Matching/exercise_code (str_spin)

; 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 [10 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @f(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  %8 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = call i64 @strlen(ptr noundef %9) #6
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = call i64 @strlen(ptr noundef %11) #6
  %13 = icmp ne i64 %10, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %2
  store i32 0, ptr %3, align 4
  br label %44

15:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #7
  %16 = load ptr, ptr %4, align 8, !tbaa !5
  %17 = call i64 @strlen(ptr noundef %16) #6
  %18 = trunc i64 %17 to i32
  store i32 %18, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #7
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = mul nsw i32 2, %19
  %21 = sext i32 %20 to i64
  %22 = mul i64 %21, 1
  %23 = call noalias ptr @malloc(i64 noundef %22) #8
  store ptr %23, ptr %7, align 8, !tbaa !5
  %24 = load ptr, ptr %7, align 8, !tbaa !5
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = call ptr @strcpy(ptr noundef %24, ptr noundef %25) #7
  %27 = load ptr, ptr %7, align 8, !tbaa !5
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds i8, ptr %27, i64 %29
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = call ptr @strcpy(ptr noundef %30, ptr noundef %31) #7
  %33 = load ptr, ptr %7, align 8, !tbaa !5
  %34 = call i32 (ptr, ...) @printf(ptr noundef @.str, ptr noundef %33)
  %35 = load ptr, ptr %7, align 8, !tbaa !5
  %36 = load ptr, ptr %5, align 8, !tbaa !5
  %37 = call ptr @strstr(ptr noundef %35, ptr noundef %36) #6
  %38 = icmp ne ptr %37, null
  br i1 %38, label %39, label %41

39:                                               ; preds = %15
  %40 = load ptr, ptr %7, align 8, !tbaa !5
  call void @free(ptr noundef %40) #7
  store i32 1, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %43

41:                                               ; preds = %15
  %42 = load ptr, ptr %7, align 8, !tbaa !5
  call void @free(ptr noundef %42) #7
  store i32 0, ptr %3, align 4
  store i32 1, ptr %8, align 4
  br label %43

43:                                               ; preds = %41, %39
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #7
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #7
  br label %44

44:                                               ; preds = %43, %14
  %45 = load i32, ptr %3, align 4
  ret i32 %45
}

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

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

; Function Attrs: nounwind
declare ptr @strcpy(ptr noundef, ptr noundef) #4

declare i32 @printf(ptr noundef, ...) #5

; Function Attrs: nounwind willreturn memory(read)
declare ptr @strstr(ptr noundef, ptr noundef) #1

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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 = { 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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 "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 = { "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 #6 = { nounwind willreturn memory(read) }
attributes #7 = { nounwind }
attributes #8 = { 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}


; 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 [10 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local range(i32 0, 2) i32 @f(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #6
  %4 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %1) #6
  %.not = icmp eq i64 %3, %4
  br i1 %.not, label %5, label %16

5:                                                ; preds = %2
  %6 = trunc i64 %3 to i32
  %7 = shl nsw i32 %6, 1
  %8 = sext i32 %7 to i64
  %9 = tail call noalias ptr @malloc(i64 noundef %8) #7
  %10 = tail call ptr @strcpy(ptr noundef nonnull dereferenceable(1) %9, ptr noundef nonnull dereferenceable(1) %0) #8
  %sext = shl i64 %3, 32
  %11 = ashr exact i64 %sext, 32
  %12 = getelementptr inbounds i8, ptr %9, i64 %11
  %13 = tail call ptr @strcpy(ptr noundef nonnull dereferenceable(1) %12, ptr noundef nonnull dereferenceable(1) %0) #8
  %14 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, ptr noundef %9)
  %15 = tail call ptr @strstr(ptr noundef nonnull dereferenceable(1) %9, ptr noundef nonnull dereferenceable(1) %1) #6
  %.not15 = icmp ne ptr %15, null
  tail call void @free(ptr noundef %9) #8
  %. = zext i1 %.not15 to i32
  br label %16

16:                                               ; preds = %5, %2
  %.1 = phi i32 [ 0, %2 ], [ %., %5 ]
  ret i32 %.1
}

; 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

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: readwrite)
declare ptr @strcpy(ptr noalias noundef returned writeonly, ptr noalias nocapture noundef readonly) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #4

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

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #5

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 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 = { mustprogress nofree nounwind willreturn memory(argmem: readwrite) "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 = { 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 #5 = { 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 #6 = { nounwind willreturn memory(read) }
attributes #7 = { nounwind allocsize(0) }
attributes #8 = { 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,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass