; LLVM IR from Shimmen/ArkoseRenderer :: arkcore/core/math/Halton.ll (ZN6halton20generateHaltonSampleEii)

; 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef float @_ZN6halton20generateHaltonSampleEii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca float, align 4
  %6 = alloca float, align 4
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store float 0.000000e+00, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = sitofp i32 %9 to float
  store float %10, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #2
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  store i64 %12, ptr %7, align 8, !tbaa !11
  br label %13

13:                                               ; preds = %16, %2
  %14 = load i64, ptr %7, align 8, !tbaa !11
  %15 = icmp ugt i64 %14, 0
  br i1 %15, label %16, label %35

16:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %17 = load i64, ptr %7, align 8, !tbaa !11
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = urem i64 %17, %19
  store i64 %20, ptr %8, align 8, !tbaa !11
  %21 = load i64, ptr %8, align 8, !tbaa !11
  %22 = uitofp i64 %21 to float
  %23 = load float, ptr %6, align 4, !tbaa !9
  %24 = fdiv float %22, %23
  %25 = load float, ptr %5, align 4, !tbaa !9
  %26 = fadd float %25, %24
  store float %26, ptr %5, align 4, !tbaa !9
  %27 = load i64, ptr %7, align 8, !tbaa !11
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = udiv i64 %27, %29
  store i64 %30, ptr %7, align 8, !tbaa !11
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = sitofp i32 %31 to float
  %33 = load float, ptr %6, align 4, !tbaa !9
  %34 = fmul float %33, %32
  store float %34, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %13, !llvm.loop !13

35:                                               ; preds = %13
  %36 = load float, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret float %36
}

; 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

attributes #0 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"float", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef float @_ZN6halton20generateHaltonSampleEii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sitofp i32 %1 to float
  %.not14 = icmp eq i32 %0, 0
  br i1 %.not14, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %4 = sext i32 %0 to i64
  %5 = sext i32 %1 to i64
  br label %6

6:                                                ; preds = %.lr.ph, %6
  %.017 = phi float [ 0.000000e+00, %.lr.ph ], [ %10, %6 ]
  %.01216 = phi i64 [ %4, %.lr.ph ], [ %11, %6 ]
  %.01315 = phi float [ %3, %.lr.ph ], [ %12, %6 ]
  %7 = urem i64 %.01216, %5
  %8 = uitofp i64 %7 to float
  %9 = fdiv float %8, %.01315
  %10 = fadd float %.017, %9
  %11 = udiv i64 %.01216, %5
  %12 = fmul float %.01315, %3
  %.not = icmp ult i64 %.01216, %5
  br i1 %.not, label %._crit_edge, label %6, !llvm.loop !5

._crit_edge:                                      ; preds = %6, %2
  %.0.lcssa = phi float [ 0.000000e+00, %2 ], [ %10, %6 ]
  ret float %.0.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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