; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R3Shapes/R3Grid.ll (ZN6R3Grid6InvertEv)

; 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.R3Grid = type { %class.R3Affine, %class.R3Affine, double, double, ptr, [3 x i32], i32, i32, i32 }
%class.R3Affine = type { %class.R3Transformation, %class.R4Matrix, %class.R4Matrix, %class.RNFlags }
%class.R3Transformation = type { ptr }
%class.R4Matrix = type { [4 x [4 x double]] }
%class.RNFlags = type { i64 }

@RN_EPSILON = external global double, align 8

; 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: inlinehint mustprogress uwtable
declare dso_local noundef i32 @_Z11RNIsNotZerodd(double noundef, double noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6R3Grid6InvertEv(ptr noundef nonnull align 8 dereferenceable(592) %0) #2 align 2 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  %5 = load ptr, ptr %2, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  %6 = getelementptr inbounds %class.R3Grid, ptr %5, i32 0, i32 4
  %7 = load ptr, ptr %6, align 8, !tbaa !9
  store ptr %7, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  store i32 0, ptr %4, align 4, !tbaa !18
  br label %8

8:                                                ; preds = %27, %1
  %9 = load i32, ptr %4, align 4, !tbaa !18
  %10 = getelementptr inbounds %class.R3Grid, ptr %5, i32 0, i32 8
  %11 = load i32, ptr %10, align 4, !tbaa !19
  %12 = icmp slt i32 %9, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %8
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  br label %30

14:                                               ; preds = %8
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load double, ptr %15, align 8, !tbaa !20
  %17 = load double, ptr @RN_EPSILON, align 8, !tbaa !20
  %18 = call noundef i32 @_Z11RNIsNotZerodd(double noundef %16, double noundef %17)
  br i1 true, label %19, label %24

19:                                               ; preds = %14
  %20 = load ptr, ptr %3, align 8, !tbaa !5
  %21 = load double, ptr %20, align 8, !tbaa !20
  %22 = fdiv double 1.000000e+00, %21
  %23 = load ptr, ptr %3, align 8, !tbaa !5
  store double %22, ptr %23, align 8, !tbaa !20
  br label %24

24:                                               ; preds = %19, %14
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds double, ptr %25, i32 1
  store ptr %26, ptr %3, align 8, !tbaa !5
  br label %27

27:                                               ; preds = %24
  %28 = load i32, ptr %4, align 4, !tbaa !18
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %4, align 4, !tbaa !18
  br label %8, !llvm.loop !21

30:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 = { 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 #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, !6, i64 560}
!10 = !{!"_ZTS6R3Grid", !11, i64 0, !11, i64 272, !16, i64 544, !16, i64 552, !6, i64 560, !7, i64 568, !17, i64 580, !17, i64 584, !17, i64 588}
!11 = !{!"_ZTS8R3Affine", !12, i64 0, !13, i64 8, !13, i64 136, !14, i64 264}
!12 = !{!"_ZTS16R3Transformation"}
!13 = !{!"_ZTS8R4Matrix", !7, i64 0}
!14 = !{!"_ZTS7RNFlags", !15, i64 0}
!15 = !{!"long", !7, i64 0}
!16 = !{!"double", !7, i64 0}
!17 = !{!"int", !7, i64 0}
!18 = !{!17, !17, i64 0}
!19 = !{!10, !17, i64 588}
!20 = !{!16, !16, i64 0}
!21 = distinct !{!21, !22}
!22 = !{!"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"

@RN_EPSILON = external local_unnamed_addr global double, align 8

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local noundef i32 @_Z11RNIsNotZerodd(double noundef, double noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN6R3Grid6InvertEv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(592) %0) local_unnamed_addr #1 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 588
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %1
  %5 = getelementptr inbounds i8, ptr %0, i64 560
  %6 = load ptr, ptr %5, align 8, !tbaa !17
  br label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.08 = phi i32 [ %13, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %.067 = phi ptr [ %12, %.lr.ph ], [ %6, %.lr.ph.preheader ]
  %7 = load double, ptr %.067, align 8, !tbaa !18
  %8 = load double, ptr @RN_EPSILON, align 8, !tbaa !18
  %9 = tail call noundef i32 @_Z11RNIsNotZerodd(double noundef %7, double noundef %8)
  %10 = load double, ptr %.067, align 8, !tbaa !18
  %11 = fdiv double 1.000000e+00, %10
  store double %11, ptr %.067, align 8, !tbaa !18
  %12 = getelementptr inbounds i8, ptr %.067, i64 8
  %13 = add nuw nsw i32 %.08, 1
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = icmp slt i32 %13, %14
  br i1 %15, label %.lr.ph, label %._crit_edge, !llvm.loop !19
}

attributes #0 = { inlinehint 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 = { 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" }

!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, !16, i64 588}
!6 = !{!"_ZTS6R3Grid", !7, i64 0, !7, i64 272, !14, i64 544, !14, i64 552, !15, i64 560, !10, i64 568, !16, i64 580, !16, i64 584, !16, i64 588}
!7 = !{!"_ZTS8R3Affine", !8, i64 0, !9, i64 8, !9, i64 136, !12, i64 264}
!8 = !{!"_ZTS16R3Transformation"}
!9 = !{!"_ZTS8R4Matrix", !10, i64 0}
!10 = !{!"omnipotent char", !11, i64 0}
!11 = !{!"Simple C++ TBAA"}
!12 = !{!"_ZTS7RNFlags", !13, i64 0}
!13 = !{!"long", !10, i64 0}
!14 = !{!"double", !10, i64 0}
!15 = !{!"any pointer", !10, i64 0}
!16 = !{!"int", !10, i64 0}
!17 = !{!6, !15, i64 560}
!18 = !{!14, !14, i64 0}
!19 = distinct !{!19, !20}
!20 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass