; LLVM IR from JessonYue/LeetCodeLearning :: Array/fenglei/homework_week1/matrix (matrix)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

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

; 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 ptr @sub(ptr noundef %0, ptr noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %8 = call noalias ptr @malloc(i64 noundef 24) #4
  store ptr %8, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %51, %2
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = icmp slt i32 %10, 3
  br i1 %11, label %12, label %54

12:                                               ; preds = %9
  %13 = call noalias ptr @malloc(i64 noundef 12) #4
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds ptr, ptr %14, i64 %16
  store ptr %13, ptr %17, align 8, !tbaa !5
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %47, %12
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = icmp slt i32 %19, 3
  br i1 %20, label %21, label %50

21:                                               ; preds = %18
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i32, ptr %6, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [3 x i32], ptr %22, i64 %24
  %26 = load i32, ptr %7, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [3 x i32], ptr %25, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !9
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = load i32, ptr %6, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [3 x i32], ptr %30, i64 %32
  %34 = load i32, ptr %7, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [3 x i32], ptr %33, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !9
  %38 = sub nsw i32 %29, %37
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  %40 = load i32, ptr %6, align 4, !tbaa !9
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds ptr, ptr %39, i64 %41
  %43 = load ptr, ptr %42, align 8, !tbaa !5
  %44 = load i32, ptr %7, align 4, !tbaa !9
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds i32, ptr %43, i64 %45
  store i32 %38, ptr %46, align 4, !tbaa !9
  br label %47

47:                                               ; preds = %21
  %48 = load i32, ptr %7, align 4, !tbaa !9
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %7, align 4, !tbaa !9
  br label %18, !llvm.loop !11

50:                                               ; preds = %18
  br label %51

51:                                               ; preds = %50
  %52 = load i32, ptr %6, align 4, !tbaa !9
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %6, align 4, !tbaa !9
  br label %9, !llvm.loop !13

54:                                               ; preds = %9
  %55 = load ptr, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  ret ptr %55
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #3 = { nounwind }
attributes #4 = { 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}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind willreturn memory(write, argmem: read, inaccessiblemem: readwrite) uwtable
define dso_local noalias noundef ptr @sub(ptr nocapture noundef readonly %0, ptr nocapture noundef readonly %1) local_unnamed_addr #1 {
  %3 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #2
  %4 = tail call noalias dereferenceable_or_null(12) ptr @malloc(i64 noundef 12) #2
  store ptr %4, ptr %3, align 8, !tbaa !5
  %5 = load <2 x i32>, ptr %0, align 4, !tbaa !9
  %6 = load <2 x i32>, ptr %1, align 4, !tbaa !9
  %7 = sub nsw <2 x i32> %5, %6
  store <2 x i32> %7, ptr %4, align 4, !tbaa !9
  %8 = getelementptr inbounds i8, ptr %0, i64 8
  %9 = load i32, ptr %8, align 4, !tbaa !9
  %10 = getelementptr inbounds i8, ptr %1, i64 8
  %11 = load i32, ptr %10, align 4, !tbaa !9
  %12 = sub nsw i32 %9, %11
  %13 = getelementptr inbounds i8, ptr %4, i64 8
  store i32 %12, ptr %13, align 4, !tbaa !9
  %14 = tail call noalias dereferenceable_or_null(12) ptr @malloc(i64 noundef 12) #2
  %15 = getelementptr inbounds i8, ptr %3, i64 8
  store ptr %14, ptr %15, align 8, !tbaa !5
  %16 = getelementptr inbounds i8, ptr %0, i64 12
  %17 = getelementptr inbounds i8, ptr %1, i64 12
  %18 = load <2 x i32>, ptr %16, align 4, !tbaa !9
  %19 = load <2 x i32>, ptr %17, align 4, !tbaa !9
  %20 = sub nsw <2 x i32> %18, %19
  store <2 x i32> %20, ptr %14, align 4, !tbaa !9
  %21 = getelementptr inbounds i8, ptr %0, i64 20
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = getelementptr inbounds i8, ptr %1, i64 20
  %24 = load i32, ptr %23, align 4, !tbaa !9
  %25 = sub nsw i32 %22, %24
  %26 = getelementptr inbounds i8, ptr %14, i64 8
  store i32 %25, ptr %26, align 4, !tbaa !9
  %27 = tail call noalias dereferenceable_or_null(12) ptr @malloc(i64 noundef 12) #2
  %28 = getelementptr inbounds i8, ptr %3, i64 16
  store ptr %27, ptr %28, align 8, !tbaa !5
  %29 = getelementptr inbounds i8, ptr %0, i64 24
  %30 = getelementptr inbounds i8, ptr %1, i64 24
  %31 = load <2 x i32>, ptr %29, align 4, !tbaa !9
  %32 = load <2 x i32>, ptr %30, align 4, !tbaa !9
  %33 = sub nsw <2 x i32> %31, %32
  store <2 x i32> %33, ptr %27, align 4, !tbaa !9
  %34 = getelementptr inbounds i8, ptr %0, i64 32
  %35 = load i32, ptr %34, align 4, !tbaa !9
  %36 = getelementptr inbounds i8, ptr %1, i64 32
  %37 = load i32, ptr %36, align 4, !tbaa !9
  %38 = sub nsw i32 %35, %37
  %39 = getelementptr inbounds i8, ptr %27, i64 8
  store i32 %38, ptr %39, align 4, !tbaa !9
  ret ptr %3
}

attributes #0 = { 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 #1 = { mustprogress nofree nounwind willreturn memory(write, argmem: read, inaccessiblemem: 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 #2 = { 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}


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