; LLVM IR from kroitor/gjk.c :: gjk (indexOfFurthestPoint)

; 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"

%struct._vec2 = type { float, float }

; Function Attrs: nounwind uwtable
declare dso_local float @dotProduct(<2 x float>, <2 x float>) #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 i64 @indexOfFurthestPoint(ptr noundef %0, i64 noundef %1, <2 x float> %2) #0 {
  %4 = alloca %struct._vec2, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i64, align 8
  %7 = alloca float, align 4
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca float, align 4
  store <2 x float> %2, ptr %4, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i64 %1, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %11 = load ptr, ptr %5, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct._vec2, ptr %11, i64 0
  %13 = load <2 x float>, ptr %4, align 4
  %14 = load <2 x float>, ptr %12, align 4
  %15 = call float @dotProduct(<2 x float> %13, <2 x float> %14)
  store float %15, ptr %7, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  store i64 0, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  store i64 1, ptr %9, align 8, !tbaa !9
  br label %16

16:                                               ; preds = %35, %3
  %17 = load i64, ptr %9, align 8, !tbaa !9
  %18 = load i64, ptr %6, align 8, !tbaa !9
  %19 = icmp ult i64 %17, %18
  br i1 %19, label %21, label %20

20:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  br label %38

21:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = load i64, ptr %9, align 8, !tbaa !9
  %24 = getelementptr inbounds %struct._vec2, ptr %22, i64 %23
  %25 = load <2 x float>, ptr %4, align 4
  %26 = load <2 x float>, ptr %24, align 4
  %27 = call float @dotProduct(<2 x float> %25, <2 x float> %26)
  store float %27, ptr %10, align 4, !tbaa !11
  %28 = load float, ptr %10, align 4, !tbaa !11
  %29 = load float, ptr %7, align 4, !tbaa !11
  %30 = fcmp ogt float %28, %29
  br i1 %30, label %31, label %34

31:                                               ; preds = %21
  %32 = load float, ptr %10, align 4, !tbaa !11
  store float %32, ptr %7, align 4, !tbaa !11
  %33 = load i64, ptr %9, align 8, !tbaa !9
  store i64 %33, ptr %8, align 8, !tbaa !9
  br label %34

34:                                               ; preds = %31, %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %35

35:                                               ; preds = %34
  %36 = load i64, ptr %9, align 8, !tbaa !9
  %37 = add i64 %36, 1
  store i64 %37, ptr %9, align 8, !tbaa !9
  br label %16, !llvm.loop !13

38:                                               ; preds = %20
  %39 = load i64, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i64 %39
}

attributes #0 = { nounwind uwtable "min-legal-vector-width"="64" "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 = { 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 = !{!"long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !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"

%struct._vec2 = type { float, float }

; Function Attrs: nounwind uwtable
declare dso_local float @dotProduct(<2 x float>, <2 x float>) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i64 @indexOfFurthestPoint(ptr nocapture noundef readonly %0, i64 noundef %1, <2 x float> %2) local_unnamed_addr #0 {
  %4 = load <2 x float>, ptr %0, align 4
  %5 = tail call float @dotProduct(<2 x float> %2, <2 x float> %4)
  %6 = icmp ugt i64 %1, 1
  br i1 %6, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %3
  %.012.lcssa = phi i64 [ 0, %3 ], [ %.113, %.lr.ph ]
  ret i64 %.012.lcssa

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.017 = phi float [ %.1, %.lr.ph ], [ %5, %3 ]
  %.01116 = phi i64 [ %11, %.lr.ph ], [ 1, %3 ]
  %.01215 = phi i64 [ %.113, %.lr.ph ], [ 0, %3 ]
  %7 = getelementptr inbounds %struct._vec2, ptr %0, i64 %.01116
  %8 = load <2 x float>, ptr %7, align 4
  %9 = tail call float @dotProduct(<2 x float> %2, <2 x float> %8)
  %10 = fcmp ogt float %9, %.017
  %.113 = select i1 %10, i64 %.01116, i64 %.01215
  %.1 = select i1 %10, float %9, float %.017
  %11 = add nuw i64 %.01116, 1
  %exitcond.not = icmp eq i64 %11, %1
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5
}

attributes #0 = { nounwind uwtable "min-legal-vector-width"="64" "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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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