; LLVM IR from niessner/Matterport :: code/gaps/pkgs/R2Shapes/R2Image.ll (ZN7R2Image8SetPixelEiiPKh)

; 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.R2Image = type { i32, i32, i32, i32, ptr }

; 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 nounwind uwtable
define dso_local void @_ZN7R2Image8SetPixelEiiPKh(ptr noundef nonnull align 8 dereferenceable(24) %0, i32 noundef %1, i32 noundef %2, ptr noundef %3) #1 align 2 {
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  store ptr %3, ptr %8, align 8, !tbaa !5
  %11 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %12 = getelementptr inbounds %class.R2Image, ptr %11, i32 0, i32 4
  %13 = load ptr, ptr %12, align 8, !tbaa !11
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = getelementptr inbounds %class.R2Image, ptr %11, i32 0, i32 3
  %16 = load i32, ptr %15, align 4, !tbaa !13
  %17 = mul nsw i32 %14, %16
  %18 = load i32, ptr %6, align 4, !tbaa !9
  %19 = getelementptr inbounds %class.R2Image, ptr %11, i32 0, i32 2
  %20 = load i32, ptr %19, align 8, !tbaa !14
  %21 = mul nsw i32 %18, %20
  %22 = add nsw i32 %17, %21
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i8, ptr %13, i64 %23
  store ptr %24, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  store i32 0, ptr %10, align 4, !tbaa !9
  br label %25

25:                                               ; preds = %37, %4
  %26 = load i32, ptr %10, align 4, !tbaa !9
  %27 = getelementptr inbounds %class.R2Image, ptr %11, i32 0, i32 2
  %28 = load i32, ptr %27, align 8, !tbaa !14
  %29 = icmp slt i32 %26, %28
  br i1 %29, label %31, label %30

30:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  br label %40

31:                                               ; preds = %25
  %32 = load ptr, ptr %8, align 8, !tbaa !5
  %33 = getelementptr inbounds i8, ptr %32, i32 1
  store ptr %33, ptr %8, align 8, !tbaa !5
  %34 = load i8, ptr %32, align 1, !tbaa !15
  %35 = load ptr, ptr %9, align 8, !tbaa !5
  %36 = getelementptr inbounds i8, ptr %35, i32 1
  store ptr %36, ptr %9, align 8, !tbaa !5
  store i8 %34, ptr %35, align 1, !tbaa !15
  br label %37

37:                                               ; preds = %31
  %38 = load i32, ptr %10, align 4, !tbaa !9
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %10, align 4, !tbaa !9
  br label %25, !llvm.loop !16

40:                                               ; preds = %30
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 16}
!12 = !{!"_ZTS7R2Image", !10, i64 0, !10, i64 4, !10, i64 8, !10, i64 12, !6, i64 16}
!13 = !{!12, !10, i64 12}
!14 = !{!12, !10, i64 8}
!15 = !{!7, !7, i64 0}
!16 = distinct !{!16, !17}
!17 = !{!"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: mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) uwtable
define dso_local void @_ZN7R2Image8SetPixelEiiPKh(ptr nocapture noundef nonnull readonly align 8 dereferenceable(24) %0, i32 noundef %1, i32 noundef %2, ptr nocapture noundef readonly %3) local_unnamed_addr #0 align 2 {
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load i32, ptr %5, align 8, !tbaa !5
  %7 = icmp sgt i32 %6, 0
  br i1 %7, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %8 = getelementptr inbounds i8, ptr %0, i64 16
  %9 = load ptr, ptr %8, align 8, !tbaa !11
  %10 = mul nsw i32 %6, %1
  %11 = getelementptr inbounds i8, ptr %0, i64 12
  %12 = load i32, ptr %11, align 4, !tbaa !12
  %13 = mul nsw i32 %12, %2
  %14 = add nsw i32 %10, %13
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds i8, ptr %9, i64 %15
  br label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %4
  ret void

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.010 = phi i32 [ %20, %.lr.ph ], [ 0, %.lr.ph.preheader ]
  %.069 = phi ptr [ %19, %.lr.ph ], [ %16, %.lr.ph.preheader ]
  %.078 = phi ptr [ %17, %.lr.ph ], [ %3, %.lr.ph.preheader ]
  %17 = getelementptr inbounds i8, ptr %.078, i64 1
  %18 = load i8, ptr %.078, align 1, !tbaa !13
  %19 = getelementptr inbounds i8, ptr %.069, i64 1
  store i8 %18, ptr %.069, align 1, !tbaa !13
  %20 = add nuw nsw i32 %.010, 1
  %21 = load i32, ptr %5, align 8, !tbaa !5
  %22 = icmp slt i32 %20, %21
  br i1 %22, label %.lr.ph, label %._crit_edge, !llvm.loop !14
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind memory(readwrite, inaccessiblemem: none) 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, !7, i64 8}
!6 = !{!"_ZTS7R2Image", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!6, !7, i64 12}
!13 = !{!8, !8, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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