; LLVM IR from 6leetcode/6leetcode :: questions/Algorithms/0976. Largest Perimeter Triangle (c1)

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

; Function Attrs: nounwind uwtable
declare dso_local i32 @cmp(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @largestPerimeter(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  %8 = load ptr, ptr %4, align 8, !tbaa !5
  %9 = load i32, ptr %5, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  call void @qsort(ptr noundef %8, i64 noundef %10, i64 noundef 4, ptr noundef @cmp)
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = sub nsw i32 %11, 1
  store i32 %12, ptr %6, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %58, %2
  %14 = load i32, ptr %6, align 4, !tbaa !9
  %15 = icmp sge i32 %14, 2
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  store i32 2, ptr %7, align 4
  br label %61

17:                                               ; preds = %13
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = sub nsw i32 %19, 2
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i32, ptr %18, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !9
  %24 = load ptr, ptr %4, align 8, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = sub nsw i32 %25, 1
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %24, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !9
  %30 = add nsw i32 %23, %29
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = load i32, ptr %6, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds i32, ptr %31, i64 %33
  %35 = load i32, ptr %34, align 4, !tbaa !9
  %36 = icmp sgt i32 %30, %35
  br i1 %36, label %37, label %57

37:                                               ; preds = %17
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = load i32, ptr %6, align 4, !tbaa !9
  %40 = sub nsw i32 %39, 2
  %41 = sext i32 %40 to i64
  %42 = getelementptr inbounds i32, ptr %38, i64 %41
  %43 = load i32, ptr %42, align 4, !tbaa !9
  %44 = load ptr, ptr %4, align 8, !tbaa !5
  %45 = load i32, ptr %6, align 4, !tbaa !9
  %46 = sub nsw i32 %45, 1
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds i32, ptr %44, i64 %47
  %49 = load i32, ptr %48, align 4, !tbaa !9
  %50 = add nsw i32 %43, %49
  %51 = load ptr, ptr %4, align 8, !tbaa !5
  %52 = load i32, ptr %6, align 4, !tbaa !9
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds i32, ptr %51, i64 %53
  %55 = load i32, ptr %54, align 4, !tbaa !9
  %56 = add nsw i32 %50, %55
  store i32 %56, ptr %3, align 4
  store i32 1, ptr %7, align 4
  br label %61

57:                                               ; preds = %17
  br label %58

58:                                               ; preds = %57
  %59 = load i32, ptr %6, align 4, !tbaa !9
  %60 = add nsw i32 %59, -1
  store i32 %60, ptr %6, align 4, !tbaa !9
  br label %13, !llvm.loop !11

61:                                               ; preds = %37, %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %62 = load i32, ptr %7, align 4
  switch i32 %62, label %66 [
    i32 2, label %63
    i32 1, label %64
  ]

63:                                               ; preds = %61
  store i32 0, ptr %3, align 4
  br label %64

64:                                               ; preds = %63, %61
  %65 = load i32, ptr %3, align 4
  ret i32 %65

66:                                               ; preds = %61
  unreachable
}

declare void @qsort(ptr noundef, i64 noundef, i64 noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { "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 }

!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"}


; 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: nounwind uwtable
declare dso_local i32 @cmp(ptr noundef, ptr noundef) #0

; Function Attrs: nofree nounwind uwtable
define dso_local i32 @largestPerimeter(ptr noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = sext i32 %1 to i64
  tail call void @qsort(ptr noundef %0, i64 noundef %3, i64 noundef 4, ptr noundef nonnull @cmp) #3
  br label %4

4:                                                ; preds = %6, %2
  %.018.in = phi i32 [ %1, %2 ], [ %.018, %6 ]
  %5 = icmp slt i32 %.018.in, 3
  br i1 %5, label %.loopexit, label %6

6:                                                ; preds = %4
  %.018 = add nsw i32 %.018.in, -1
  %7 = zext nneg i32 %.018.in to i64
  %8 = getelementptr i32, ptr %0, i64 %7
  %9 = getelementptr i8, ptr %8, i64 -12
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = getelementptr i8, ptr %8, i64 -8
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = add nsw i32 %12, %10
  %14 = zext nneg i32 %.018 to i64
  %15 = getelementptr inbounds i32, ptr %0, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = icmp sgt i32 %13, %16
  br i1 %17, label %18, label %4, !llvm.loop !9

18:                                               ; preds = %6
  %19 = add nsw i32 %13, %16
  br label %.loopexit

.loopexit:                                        ; preds = %4, %18
  %spec.select = phi i32 [ %19, %18 ], [ 0, %4 ]
  ret i32 %spec.select
}

; Function Attrs: nofree
declare void @qsort(ptr noundef, i64 noundef, i64 noundef, ptr nocapture noundef) local_unnamed_addr #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 = { nofree 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 #2 = { nofree "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 }

!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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass