; LLVM IR from sp-nitech/SPTK :: third_party/SWIPE/vector.ll (ZN4sptk5swipe7bilookvENS0_6vectorEdi)

; 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"

%"struct.sptk::swipe::vector" = type { 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 noundef i32 @_ZN4sptk5swipe7bilookvENS0_6vectorEdi(i32 %0, ptr %1, double noundef %2, i32 noundef %3) #1 {
  %5 = alloca %"struct.sptk::swipe::vector", align 8
  %6 = alloca double, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = getelementptr inbounds { i32, ptr }, ptr %5, i32 0, i32 0
  store i32 %0, ptr %10, align 8
  %11 = getelementptr inbounds { i32, ptr }, ptr %5, i32 0, i32 1
  store ptr %1, ptr %11, align 8
  store double %2, ptr %6, align 8, !tbaa !5
  store i32 %3, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %12 = getelementptr inbounds %"struct.sptk::swipe::vector", ptr %5, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !11
  store i32 %13, ptr %9, align 4, !tbaa !9
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = add nsw i32 %14, -1
  store i32 %15, ptr %7, align 4, !tbaa !9
  br label %16

16:                                               ; preds = %38, %4
  %17 = load i32, ptr %9, align 4, !tbaa !9
  %18 = load i32, ptr %7, align 4, !tbaa !9
  %19 = sub nsw i32 %17, %18
  %20 = icmp sgt i32 %19, 1
  br i1 %20, label %21, label %39

21:                                               ; preds = %16
  %22 = load i32, ptr %9, align 4, !tbaa !9
  %23 = load i32, ptr %7, align 4, !tbaa !9
  %24 = add nsw i32 %22, %23
  %25 = ashr i32 %24, 1
  store i32 %25, ptr %8, align 4, !tbaa !9
  %26 = getelementptr inbounds %"struct.sptk::swipe::vector", ptr %5, i32 0, i32 1
  %27 = load ptr, ptr %26, align 8, !tbaa !14
  %28 = load i32, ptr %8, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds double, ptr %27, i64 %29
  %31 = load double, ptr %30, align 8, !tbaa !5
  %32 = load double, ptr %6, align 8, !tbaa !5
  %33 = fcmp ogt double %31, %32
  br i1 %33, label %34, label %36

34:                                               ; preds = %21
  %35 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %35, ptr %9, align 4, !tbaa !9
  br label %38

36:                                               ; preds = %21
  %37 = load i32, ptr %8, align 4, !tbaa !9
  store i32 %37, ptr %7, align 4, !tbaa !9
  br label %38

38:                                               ; preds = %36, %34
  br label %16, !llvm.loop !15

39:                                               ; preds = %16
  %40 = load i32, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  ret i32 %40
}

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 = !{!"double", !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, !10, i64 0}
!12 = !{!"_ZTSN4sptk5swipe6vectorE", !10, i64 0, !13, i64 8}
!13 = !{!"any pointer", !7, i64 0}
!14 = !{!12, !13, i64 8}
!15 = distinct !{!15, !16}
!16 = !{!"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(argmem: read) uwtable
define dso_local noundef i32 @_ZN4sptk5swipe7bilookvENS0_6vectorEdi(i32 %0, ptr nocapture readonly %1, double noundef %2, i32 noundef %3) local_unnamed_addr #0 {
  %5 = add nsw i32 %3, -1
  %6 = sub nsw i32 %0, %5
  %7 = icmp sgt i32 %6, 1
  br i1 %7, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %4, %.lr.ph
  %.012 = phi i32 [ %..0, %.lr.ph ], [ %0, %4 ]
  %.0911 = phi i32 [ %.09., %.lr.ph ], [ %5, %4 ]
  %8 = add nsw i32 %.012, %.0911
  %9 = ashr i32 %8, 1
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds double, ptr %1, i64 %10
  %12 = load double, ptr %11, align 8, !tbaa !5
  %13 = fcmp ogt double %12, %2
  %.09. = select i1 %13, i32 %.0911, i32 %9
  %..0 = select i1 %13, i32 %9, i32 %.012
  %14 = sub nsw i32 %..0, %.09.
  %15 = icmp sgt i32 %14, 1
  br i1 %15, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %4
  %.0.lcssa = phi i32 [ %0, %4 ], [ %..0, %.lr.ph ]
  ret i32 %.0.lcssa
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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 = !{!"double", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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