; LLVM IR from gzc/CLRS :: C33-Computational-Geometry/exercise_code/area.ll (Z19calculateAreaOfHullP5Pointi)

; 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.Point = type { float, float }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef float @_Z4area5PointS_S_(<2 x float>, <2 x float>, <2 x float>) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef float @_Z19calculateAreaOfHullP5Pointi(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca float, align 4
  %6 = alloca i32, align 4
  %7 = alloca %struct.Point, align 4
  %8 = alloca %struct.Point, align 4
  %9 = alloca %struct.Point, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store float 0.000000e+00, ptr %5, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 1, ptr %6, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %35, %2
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = sub nsw i32 %12, 1
  %14 = icmp slt i32 %11, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %38

16:                                               ; preds = %10
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.Point, ptr %17, i64 0
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %7, ptr align 4 %18, i64 8, i1 false), !tbaa.struct !13
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds %struct.Point, ptr %19, i64 %21
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %8, ptr align 4 %22, i64 8, i1 false), !tbaa.struct !13
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  %24 = load i32, ptr %6, align 4, !tbaa !9
  %25 = add nsw i32 %24, 1
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds %struct.Point, ptr %23, i64 %26
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %9, ptr align 4 %27, i64 8, i1 false), !tbaa.struct !13
  %28 = load <2 x float>, ptr %7, align 4
  %29 = load <2 x float>, ptr %8, align 4
  %30 = load <2 x float>, ptr %9, align 4
  %31 = call noundef float @_Z4area5PointS_S_(<2 x float> %28, <2 x float> %29, <2 x float> %30)
  %32 = call noundef float @_ZSt3absf(float noundef %31)
  %33 = load float, ptr %5, align 4, !tbaa !11
  %34 = fadd float %33, %32
  store float %34, ptr %5, align 4, !tbaa !11
  br label %35

35:                                               ; preds = %16
  %36 = load i32, ptr %6, align 4, !tbaa !9
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %6, align 4, !tbaa !9
  br label %10, !llvm.loop !14

38:                                               ; preds = %15
  %39 = load float, ptr %5, align 4, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  ret float %39
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef float @_ZSt3absf(float noundef) #3

; 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) #4

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

attributes #0 = { mustprogress 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 = { mustprogress 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 #2 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { inlinehint mustprogress 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 #4 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { 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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"float", !7, i64 0}
!13 = !{i64 0, i64 4, !11, i64 4, i64 4, !11}
!14 = distinct !{!14, !15}
!15 = !{!"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.Point = type { float, float }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef float @_Z4area5PointS_S_(<2 x float>, <2 x float>, <2 x float>) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef float @_Z19calculateAreaOfHullP5Pointi(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 2
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %4 = add nsw i32 %1, -1
  %wide.trip.count = zext nneg i32 %4 to i64
  br label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.0.lcssa = phi float [ 0.000000e+00, %2 ], [ %9, %.lr.ph ]
  ret float %.0.lcssa

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 1, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.013 = phi float [ 0.000000e+00, %.lr.ph.preheader ], [ %9, %.lr.ph ]
  %.sroa.02.0.copyload = load <2 x float>, ptr %0, align 4
  %5 = getelementptr inbounds %struct.Point, ptr %0, i64 %indvars.iv
  %.sroa.01.0.copyload = load <2 x float>, ptr %5, align 4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %6 = getelementptr inbounds %struct.Point, ptr %0, i64 %indvars.iv.next
  %.sroa.0.0.copyload = load <2 x float>, ptr %6, align 4
  %7 = tail call noundef float @_Z4area5PointS_S_(<2 x float> %.sroa.02.0.copyload, <2 x float> %.sroa.01.0.copyload, <2 x float> %.sroa.0.0.copyload)
  %8 = tail call noundef float @_ZSt3absf(float noundef %7)
  %9 = fadd float %.013, %8
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %.lr.ph, !llvm.loop !5
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef float @_ZSt3absf(float noundef) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { inlinehint mustprogress 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" }

!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,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass