; LLVM IR from abeaumont/competitive-programming :: uva/00893.ll (Z12month2offsetii)

; 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"

@__const._Z12month2offsetii.days = external hidden unnamed_addr constant [12 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z6isleapi(i32 noundef) #0

; 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

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z12month2offsetii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca [12 x i32], align 16
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  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 48, ptr %5) #3
  call void @llvm.memcpy.p0.p0.i64(ptr align 16 %5, ptr align 16 @__const._Z12month2offsetii.days, i64 48, i1 false)
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = icmp sgt i32 %8, 2
  br i1 %9, label %10, label %14

10:                                               ; preds = %2
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = call noundef i32 @_Z6isleapi(i32 noundef %11)
  %13 = icmp ne i32 %12, 0
  br label %14

14:                                               ; preds = %10, %2
  %15 = phi i1 [ false, %2 ], [ %13, %10 ]
  %16 = zext i1 %15 to i64
  %17 = select i1 %15, i32 1, i32 0
  store i32 %17, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 1, ptr %7, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %31, %14
  %19 = load i32, ptr %7, align 4, !tbaa !5
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %34

23:                                               ; preds = %18
  %24 = load i32, ptr %7, align 4, !tbaa !5
  %25 = sub nsw i32 %24, 1
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [12 x i32], ptr %5, i64 0, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = add nsw i32 %29, %28
  store i32 %30, ptr %6, align 4, !tbaa !5
  br label %31

31:                                               ; preds = %23
  %32 = load i32, ptr %7, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %7, align 4, !tbaa !5
  br label %18, !llvm.loop !9

34:                                               ; preds = %22
  %35 = load i32, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 48, ptr %5) #3
  ret i32 %35
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"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"

@__const._Z12month2offsetii.days = external hidden unnamed_addr constant [12 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z6isleapi(i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z12month2offsetii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 2
  br i1 %3, label %.thread, label %7

.thread:                                          ; preds = %2
  %4 = tail call noundef i32 @_Z6isleapi(i32 noundef %0)
  %5 = icmp ne i32 %4, 0
  %6 = zext i1 %5 to i32
  br label %.lr.ph.preheader

7:                                                ; preds = %2
  %8 = icmp eq i32 %1, 2
  br i1 %8, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %.thread, %7
  %9 = phi i32 [ %6, %.thread ], [ 0, %7 ]
  %wide.trip.count = zext nneg i32 %1 to i64
  %10 = add nsw i64 %wide.trip.count, -1
  %min.iters.check = icmp ult i64 %10, 8
  br i1 %min.iters.check, label %.lr.ph.preheader14, label %vector.ph

.lr.ph.preheader14:                               ; preds = %middle.block, %.lr.ph.preheader
  %indvars.iv.ph = phi i64 [ 1, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  %.089.ph = phi i32 [ %9, %.lr.ph.preheader ], [ %17, %middle.block ]
  br label %.lr.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i64 %10, -8
  %ind.end = or disjoint i64 %n.vec, 1
  %11 = insertelement <4 x i32> <i32 poison, i32 0, i32 0, i32 0>, i32 %9, i64 0
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ %11, %vector.ph ], [ %14, %vector.body ]
  %vec.phi12 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %15, %vector.body ]
  %12 = getelementptr inbounds [12 x i32], ptr @__const._Z12month2offsetii.days, i64 0, i64 %index
  %13 = getelementptr inbounds i8, ptr %12, i64 16
  %wide.load = load <4 x i32>, ptr %12, align 16, !tbaa !5
  %wide.load13 = load <4 x i32>, ptr %13, align 16, !tbaa !5
  %14 = add <4 x i32> %wide.load, %vec.phi
  %15 = add <4 x i32> %wide.load13, %vec.phi12
  %index.next = add nuw i64 %index, 8
  %16 = icmp eq i64 %index.next, %n.vec
  br i1 %16, label %middle.block, label %vector.body, !llvm.loop !9

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <4 x i32> %15, %14
  %17 = tail call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i64 %10, %n.vec
  br i1 %cmp.n, label %._crit_edge, label %.lr.ph.preheader14

._crit_edge:                                      ; preds = %.lr.ph, %middle.block, %7
  %.08.lcssa = phi i32 [ 0, %7 ], [ %17, %middle.block ], [ %21, %.lr.ph ]
  ret i32 %.08.lcssa

.lr.ph:                                           ; preds = %.lr.ph.preheader14, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ %indvars.iv.ph, %.lr.ph.preheader14 ]
  %.089 = phi i32 [ %21, %.lr.ph ], [ %.089.ph, %.lr.ph.preheader14 ]
  %18 = add nsw i64 %indvars.iv, -1
  %19 = getelementptr inbounds [12 x i32], ptr @__const._Z12month2offsetii.days, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = add nsw i32 %20, %.089
  %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 %.lr.ph, !llvm.loop !13
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.add.v4i32(<4 x i32>) #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 speculatable willreturn memory(none) }

!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 = distinct !{!9, !10, !11, !12}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!"llvm.loop.isvectorized", i32 1}
!12 = !{!"llvm.loop.unroll.runtime.disable"}
!13 = distinct !{!13, !10, !12, !11}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopLoadEliminationPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,LoopVectorizePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass