; LLVM IR from sp-nitech/SPTK :: third_party/SWIPE/vector.ll (ZN4sptk5swipe4maxvENS0_6vectorE)

; 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 @_ZN4sptk5swipe4maxvENS0_6vectorE(i32 %0, ptr %1) #1 {
  %3 = alloca %"struct.sptk::swipe::vector", align 8
  %4 = alloca i32, align 4
  %5 = alloca double, align 8
  %6 = alloca i32, align 4
  %7 = getelementptr inbounds { i32, ptr }, ptr %3, i32 0, i32 0
  store i32 %0, ptr %7, align 8
  %8 = getelementptr inbounds { i32, ptr }, ptr %3, i32 0, i32 1
  store ptr %1, ptr %8, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 -1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store double -3.276800e+04, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %32, %2
  %10 = load i32, ptr %6, align 4, !tbaa !5
  %11 = getelementptr inbounds %"struct.sptk::swipe::vector", ptr %3, i32 0, i32 0
  %12 = load i32, ptr %11, align 8, !tbaa !11
  %13 = icmp slt i32 %10, %12
  br i1 %13, label %14, label %35

14:                                               ; preds = %9
  %15 = getelementptr inbounds %"struct.sptk::swipe::vector", ptr %3, i32 0, i32 1
  %16 = load ptr, ptr %15, align 8, !tbaa !14
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds double, ptr %16, i64 %18
  %20 = load double, ptr %19, align 8, !tbaa !9
  %21 = load double, ptr %5, align 8, !tbaa !9
  %22 = fcmp ogt double %20, %21
  br i1 %22, label %23, label %31

23:                                               ; preds = %14
  %24 = getelementptr inbounds %"struct.sptk::swipe::vector", ptr %3, i32 0, i32 1
  %25 = load ptr, ptr %24, align 8, !tbaa !14
  %26 = load i32, ptr %6, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds double, ptr %25, i64 %27
  %29 = load double, ptr %28, align 8, !tbaa !9
  store double %29, ptr %5, align 8, !tbaa !9
  %30 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %30, ptr %4, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %23, %14
  br label %32

32:                                               ; preds = %31
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %6, align 4, !tbaa !5
  br label %9, !llvm.loop !15

35:                                               ; preds = %9
  %36 = load i32, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  ret i32 %36
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTSN4sptk5swipe6vectorE", !6, 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 @_ZN4sptk5swipe4maxvENS0_6vectorE(i32 %0, ptr nocapture readonly %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %0, 0
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %2
  %wide.trip.count = zext nneg i32 %0 to i64
  %xtraiter = and i64 %wide.trip.count, 1
  %4 = icmp eq i32 %0, 1
  br i1 %4, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %wide.trip.count, 2147483646
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader.new ], [ %indvars.iv.next.1, %.lr.ph ]
  %.0712 = phi double [ -3.276800e+04, %.lr.ph.preheader.new ], [ %.1.1, %.lr.ph ]
  %.0811 = phi i32 [ -1, %.lr.ph.preheader.new ], [ %.19.1, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.1, %.lr.ph ]
  %5 = getelementptr inbounds double, ptr %1, i64 %indvars.iv
  %6 = load double, ptr %5, align 8, !tbaa !5
  %7 = fcmp ogt double %6, %.0712
  %8 = trunc nuw nsw i64 %indvars.iv to i32
  %.19 = select i1 %7, i32 %8, i32 %.0811
  %.1 = select i1 %7, double %6, double %.0712
  %indvars.iv.next = or disjoint i64 %indvars.iv, 1
  %9 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.next
  %10 = load double, ptr %9, align 8, !tbaa !5
  %11 = fcmp ogt double %10, %.1
  %12 = trunc nuw nsw i64 %indvars.iv.next to i32
  %.19.1 = select i1 %11, i32 %12, i32 %.19
  %.1.1 = select i1 %11, double %10, double %.1
  %indvars.iv.next.1 = add nuw nsw i64 %indvars.iv, 2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1 = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph, !llvm.loop !9

._crit_edge.loopexit.unr-lcssa:                   ; preds = %.lr.ph, %.lr.ph.preheader
  %.19.lcssa.ph = phi i32 [ poison, %.lr.ph.preheader ], [ %.19.1, %.lr.ph ]
  %indvars.iv.unr = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next.1, %.lr.ph ]
  %.0712.unr = phi double [ -3.276800e+04, %.lr.ph.preheader ], [ %.1.1, %.lr.ph ]
  %.0811.unr = phi i32 [ -1, %.lr.ph.preheader ], [ %.19.1, %.lr.ph ]
  %lcmp.mod.not = icmp eq i64 %xtraiter, 0
  br i1 %lcmp.mod.not, label %._crit_edge, label %.lr.ph.epil

.lr.ph.epil:                                      ; preds = %._crit_edge.loopexit.unr-lcssa
  %13 = getelementptr inbounds double, ptr %1, i64 %indvars.iv.unr
  %14 = load double, ptr %13, align 8, !tbaa !5
  %15 = fcmp ogt double %14, %.0712.unr
  %16 = trunc nuw nsw i64 %indvars.iv.unr to i32
  %.19.epil = select i1 %15, i32 %16, i32 %.0811.unr
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.epil, %._crit_edge.loopexit.unr-lcssa, %2
  %.08.lcssa = phi i32 [ -1, %2 ], [ %.19.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %.19.epil, %.lr.ph.epil ]
  ret i32 %.08.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: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass