; LLVM IR from facebookresearch/habitat-sim :: src/deps/basis-universal/encoder/basisu_resampler.ll (ZN6basisu9Resampler5clampEPfi)

; 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 uwtable
define dso_local void @_ZN6basisu9Resampler5clampEPfi(ptr noundef nonnull align 8 dereferenceable(116) %0, ptr noundef %1, i32 noundef %2) #1 align 2 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca float, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !9
  %8 = load ptr, ptr %4, align 8
  br label %9

9:                                                ; preds = %12, %3
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = icmp sgt i32 %10, 0
  br i1 %11, label %12, label %21

12:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %13 = load ptr, ptr %5, align 8, !tbaa !5
  %14 = load float, ptr %13, align 4, !tbaa !11
  store float %14, ptr %7, align 4, !tbaa !11
  %15 = load float, ptr %7, align 4, !tbaa !11
  %16 = call noundef float @_ZNK6basisu9Resampler12clamp_sampleEf(ptr noundef nonnull align 8 dereferenceable(116) %8, float noundef %15)
  %17 = load ptr, ptr %5, align 8, !tbaa !5
  %18 = getelementptr inbounds float, ptr %17, i32 1
  store ptr %18, ptr %5, align 8, !tbaa !5
  store float %16, ptr %17, align 4, !tbaa !11
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = add nsw i32 %19, -1
  store i32 %20, ptr %6, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %9, !llvm.loop !13

21:                                               ; preds = %9
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef float @_ZNK6basisu9Resampler12clamp_sampleEf(ptr noundef nonnull align 8 dereferenceable(116), float noundef) #2 align 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 = { inlinehint 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 #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, !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 nounwind uwtable
define dso_local void @_ZN6basisu9Resampler5clampEPfi(ptr noundef nonnull align 8 dereferenceable(116) %0, ptr nocapture noundef %1, i32 noundef %2) local_unnamed_addr #0 align 2 {
  %4 = icmp sgt i32 %2, 0
  br i1 %4, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %3, %.lr.ph
  %.07 = phi ptr [ %7, %.lr.ph ], [ %1, %3 ]
  %.056 = phi i32 [ %8, %.lr.ph ], [ %2, %3 ]
  %5 = load float, ptr %.07, align 4, !tbaa !5
  %6 = tail call noundef float @_ZNK6basisu9Resampler12clamp_sampleEf(ptr noundef nonnull align 8 dereferenceable(116) %0, float noundef %5)
  %7 = getelementptr inbounds i8, ptr %.07, i64 4
  store float %6, ptr %.07, align 4, !tbaa !5
  %8 = add nsw i32 %.056, -1
  %9 = icmp ugt i32 %.056, 1
  br i1 %9, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %3
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef float @_ZNK6basisu9Resampler12clamp_sampleEf(ptr noundef nonnull align 8 dereferenceable(116), float noundef) local_unnamed_addr #1 align 2

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 = { inlinehint 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" }

!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: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass