; LLVM IR from balintbalazs/B3D :: source/src/B3D_cudaCompress/CPU/PredictorsCPU.ll (ZN12cudaCompress4util6vstCPUEPfS1_ifff)

; 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: 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 @_ZN12cudaCompress4util6vstCPUEPfS1_ifff(ptr noundef %0, ptr noundef %1, i32 noundef %2, float noundef %3, float noundef %4, float noundef %5) #1 {
  %7 = alloca ptr, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca float, align 4
  %11 = alloca float, align 4
  %12 = alloca float, align 4
  %13 = alloca i32, align 4
  store ptr %0, ptr %7, align 8, !tbaa !5
  store ptr %1, ptr %8, align 8, !tbaa !5
  store i32 %2, ptr %9, align 4, !tbaa !9
  store float %3, ptr %10, align 4, !tbaa !11
  store float %4, ptr %11, align 4, !tbaa !11
  store float %5, ptr %12, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #4
  store i32 0, ptr %13, align 4, !tbaa !9
  br label %14

14:                                               ; preds = %42, %6
  %15 = load i32, ptr %13, align 4, !tbaa !9
  %16 = load i32, ptr %9, align 4, !tbaa !9
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #4
  br label %45

19:                                               ; preds = %14
  %20 = load ptr, ptr %7, align 8, !tbaa !5
  %21 = load i32, ptr %13, align 4, !tbaa !9
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds float, ptr %20, i64 %22
  %24 = load float, ptr %23, align 4, !tbaa !11
  %25 = load float, ptr %10, align 4, !tbaa !11
  %26 = fsub float %24, %25
  %27 = call float @llvm.maxnum.f32(float %26, float 0.000000e+00)
  %28 = load float, ptr %11, align 4, !tbaa !11
  %29 = fdiv float %27, %28
  %30 = load float, ptr %12, align 4, !tbaa !11
  %31 = load float, ptr %12, align 4, !tbaa !11
  %32 = call float @llvm.fmuladd.f32(float %30, float %31, float %29)
  %33 = call float @sqrtf(float noundef %32) #4
  %34 = load float, ptr %12, align 4, !tbaa !11
  %35 = fmul float 2.000000e+00, %34
  %36 = fneg float %35
  %37 = call float @llvm.fmuladd.f32(float 2.000000e+00, float %33, float %36)
  %38 = load ptr, ptr %8, align 8, !tbaa !5
  %39 = load i32, ptr %13, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds float, ptr %38, i64 %40
  store float %37, ptr %41, align 4, !tbaa !11
  br label %42

42:                                               ; preds = %19
  %43 = load i32, ptr %13, align 4, !tbaa !9
  %44 = add nsw i32 %43, 1
  store i32 %44, ptr %13, align 4, !tbaa !9
  br label %14, !llvm.loop !13

45:                                               ; preds = %18
  ret void
}

; Function Attrs: nounwind
declare float @sqrtf(float noundef) #2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.maxnum.f32(float, float) #3

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #3

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 "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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #4 = { 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 = 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 nounwind memory(write, argmem: readwrite) uwtable
define dso_local void @_ZN12cudaCompress4util6vstCPUEPfS1_ifff(ptr nocapture noundef readonly %0, ptr nocapture noundef writeonly %1, i32 noundef %2, float noundef %3, float noundef %4, float noundef %5) local_unnamed_addr #0 {
  %7 = icmp sgt i32 %2, 0
  br i1 %7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %6
  %8 = fmul float %5, -2.000000e+00
  %wide.trip.count = zext nneg i32 %2 to i64
  br label %9

._crit_edge:                                      ; preds = %9, %6
  ret void

9:                                                ; preds = %.lr.ph, %9
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %9 ]
  %10 = getelementptr inbounds float, ptr %0, i64 %indvars.iv
  %11 = load float, ptr %10, align 4, !tbaa !5
  %12 = fsub float %11, %3
  %13 = tail call float @llvm.maxnum.f32(float %12, float 0.000000e+00)
  %14 = fdiv float %13, %4
  %15 = tail call float @llvm.fmuladd.f32(float %5, float %5, float %14)
  %16 = tail call float @sqrtf(float noundef %15) #3
  %17 = tail call float @llvm.fmuladd.f32(float %16, float 2.000000e+00, float %8)
  %18 = getelementptr inbounds float, ptr %1, i64 %indvars.iv
  store float %17, ptr %18, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %9, !llvm.loop !9
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(write)
declare float @sqrtf(float noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.maxnum.f32(float, float) #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare float @llvm.fmuladd.f32(float, float, float) #2

attributes #0 = { mustprogress nofree nounwind memory(write, argmem: readwrite) 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 nofree nounwind willreturn memory(write) "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 nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"float", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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