; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R2Shapes/R2Polygon.ll (ZNK9R2Polygon9PerimeterEv)

; 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"

%class.R2Polygon = type <{ %class.R2Solid, ptr, i32, [4 x i8], %class.R2Box, i32, [4 x i8] }>
%class.R2Solid = type { %class.R2Shape }
%class.R2Shape = type { ptr }
%class.R2Box = type { %class.R2Solid, %class.R2Point, %class.R2Point }
%class.R2Point = type { [2 x double] }

; 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: mustprogress uwtable
define dso_local noundef double @_ZNK9R2Polygon9PerimeterEv(ptr noundef nonnull align 8 dereferenceable(68) %0) unnamed_addr #1 align 2 {
  %2 = alloca double, align 8
  %3 = alloca ptr, align 8
  %4 = alloca double, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %8 = load ptr, ptr %3, align 8
  %9 = getelementptr inbounds %class.R2Polygon, ptr %8, i32 0, i32 2
  %10 = load i32, ptr %9, align 8, !tbaa !9
  %11 = icmp slt i32 %10, 2
  br i1 %11, label %12, label %13

12:                                               ; preds = %1
  store double 0.000000e+00, ptr %2, align 8
  br label %44

13:                                               ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  store double 0.000000e+00, ptr %4, align 8, !tbaa !16
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %14 = getelementptr inbounds %class.R2Polygon, ptr %8, i32 0, i32 1
  %15 = load ptr, ptr %14, align 8, !tbaa !18
  %16 = getelementptr inbounds %class.R2Polygon, ptr %8, i32 0, i32 2
  %17 = load i32, ptr %16, align 8, !tbaa !9
  %18 = sub nsw i32 %17, 1
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds %class.R2Point, ptr %15, i64 %19
  store ptr %20, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !19
  br label %21

21:                                               ; preds = %39, %13
  %22 = load i32, ptr %6, align 4, !tbaa !19
  %23 = getelementptr inbounds %class.R2Polygon, ptr %8, i32 0, i32 2
  %24 = load i32, ptr %23, align 8, !tbaa !9
  %25 = icmp slt i32 %22, %24
  br i1 %25, label %27, label %26

26:                                               ; preds = %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %42

27:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %28 = getelementptr inbounds %class.R2Polygon, ptr %8, i32 0, i32 1
  %29 = load ptr, ptr %28, align 8, !tbaa !18
  %30 = load i32, ptr %6, align 4, !tbaa !19
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds %class.R2Point, ptr %29, i64 %31
  store ptr %32, ptr %7, align 8, !tbaa !5
  %33 = load ptr, ptr %5, align 8, !tbaa !5
  %34 = load ptr, ptr %7, align 8, !tbaa !5
  %35 = call noundef double @_Z10R2DistanceRK7R2PointS1_(ptr noundef nonnull align 8 dereferenceable(16) %33, ptr noundef nonnull align 8 dereferenceable(16) %34)
  %36 = load double, ptr %4, align 8, !tbaa !16
  %37 = fadd double %36, %35
  store double %37, ptr %4, align 8, !tbaa !16
  %38 = load ptr, ptr %7, align 8, !tbaa !5
  store ptr %38, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %39

39:                                               ; preds = %27
  %40 = load i32, ptr %6, align 4, !tbaa !19
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %6, align 4, !tbaa !19
  br label %21, !llvm.loop !20

42:                                               ; preds = %26
  %43 = load double, ptr %4, align 8, !tbaa !16
  store double %43, ptr %2, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  br label %44

44:                                               ; preds = %42, %12
  %45 = load double, ptr %2, align 8
  ret double %45
}

declare noundef double @_Z10R2DistanceRK7R2PointS1_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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++ TBAA"}
!9 = !{!10, !13, i64 16}
!10 = !{!"_ZTS9R2Polygon", !11, i64 0, !6, i64 8, !13, i64 16, !14, i64 24, !13, i64 64}
!11 = !{!"_ZTS7R2Solid", !12, i64 0}
!12 = !{!"_ZTS7R2Shape"}
!13 = !{!"int", !7, i64 0}
!14 = !{!"_ZTS5R2Box", !11, i64 0, !15, i64 8, !15, i64 24}
!15 = !{!"_ZTS7R2Point", !7, i64 0}
!16 = !{!17, !17, i64 0}
!17 = !{!"double", !7, i64 0}
!18 = !{!10, !6, i64 8}
!19 = !{!13, !13, i64 0}
!20 = distinct !{!20, !21}
!21 = !{!"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"

%class.R2Point = type { [2 x double] }

; Function Attrs: mustprogress uwtable
define dso_local noundef double @_ZNK9R2Polygon9PerimeterEv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(68) %0) unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load i32, ptr %2, align 8, !tbaa !5
  %4 = icmp slt i32 %3, 2
  br i1 %4, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %1
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !15
  %7 = zext nneg i32 %3 to i64
  %8 = getelementptr %class.R2Point, ptr %6, i64 %7
  %9 = getelementptr i8, ptr %8, i64 -16
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.01014 = phi ptr [ %9, %.lr.ph.preheader ], [ %11, %.lr.ph ]
  %.01113 = phi double [ 0.000000e+00, %.lr.ph.preheader ], [ %13, %.lr.ph ]
  %10 = load ptr, ptr %5, align 8, !tbaa !15
  %11 = getelementptr inbounds %class.R2Point, ptr %10, i64 %indvars.iv
  %12 = tail call noundef double @_Z10R2DistanceRK7R2PointS1_(ptr noundef nonnull align 8 dereferenceable(16) %.01014, ptr noundef nonnull align 8 dereferenceable(16) %11)
  %13 = fadd double %.01113, %12
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %14 = load i32, ptr %2, align 8, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = icmp slt i64 %indvars.iv.next, %15
  br i1 %16, label %.lr.ph, label %.loopexit, !llvm.loop !16

.loopexit:                                        ; preds = %.lr.ph, %1
  %.0 = phi double [ 0.000000e+00, %1 ], [ %13, %.lr.ph ]
  ret double %.0
}

declare noundef double @_Z10R2DistanceRK7R2PointS1_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #1

attributes #0 = { mustprogress 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 = { "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 = !{!6, !12, i64 16}
!6 = !{!"_ZTS9R2Polygon", !7, i64 0, !9, i64 8, !12, i64 16, !13, i64 24, !12, i64 64}
!7 = !{!"_ZTS7R2Solid", !8, i64 0}
!8 = !{!"_ZTS7R2Shape"}
!9 = !{!"any pointer", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = !{!"int", !10, i64 0}
!13 = !{!"_ZTS5R2Box", !7, i64 0, !14, i64 8, !14, i64 24}
!14 = !{!"_ZTS7R2Point", !10, i64 0}
!15 = !{!6, !9, i64 8}
!16 = distinct !{!16, !17}
!17 = !{!"llvm.loop.mustprogress"}


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