; LLVM IR from xirc/cp-algorithm :: aoj/ITP1/ITP7B/main.ll (Z5solveii)

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z5solveii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = 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 4, ptr %5) #2
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %10

10:                                               ; preds = %45, %2
  %11 = load i32, ptr %6, align 4, !tbaa !5
  %12 = load i32, ptr %3, align 4, !tbaa !5
  %13 = icmp sle i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  store i32 2, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %48

15:                                               ; preds = %10
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = add nsw i32 %16, 1
  store i32 %17, ptr %8, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %41, %15
  %19 = load i32, ptr %8, align 4, !tbaa !5
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = icmp sle i32 %19, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %18
  store i32 5, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %44

23:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = sub nsw i32 %24, %25
  %27 = load i32, ptr %8, align 4, !tbaa !5
  %28 = sub nsw i32 %26, %27
  store i32 %28, ptr %9, align 4, !tbaa !5
  %29 = load i32, ptr %9, align 4, !tbaa !5
  %30 = load i32, ptr %8, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  %32 = icmp sge i32 %29, %31
  br i1 %32, label %33, label %40

33:                                               ; preds = %23
  %34 = load i32, ptr %9, align 4, !tbaa !5
  %35 = load i32, ptr %3, align 4, !tbaa !5
  %36 = icmp sle i32 %34, %35
  br i1 %36, label %37, label %40

37:                                               ; preds = %33
  %38 = load i32, ptr %5, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %5, align 4, !tbaa !5
  br label %40

40:                                               ; preds = %37, %33, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %41

41:                                               ; preds = %40
  %42 = load i32, ptr %8, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  store i32 %43, ptr %8, align 4, !tbaa !5
  br label %18, !llvm.loop !9

44:                                               ; preds = %22
  br label %45

45:                                               ; preds = %44
  %46 = load i32, ptr %6, align 4, !tbaa !5
  %47 = add nsw i32 %46, 1
  store i32 %47, ptr %6, align 4, !tbaa !5
  br label %10, !llvm.loop !11

48:                                               ; preds = %14
  %49 = load i32, ptr %5, align 4, !tbaa !5
  store i32 1, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  ret i32 %49
}

; 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

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 = { 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"}
!11 = distinct !{!11, !10}


; 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(none) uwtable
define dso_local noundef i32 @_Z5solveii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not26 = icmp slt i32 %0, 1
  br i1 %.not26, label %._crit_edge, label %.lr.ph29.preheader

.lr.ph29.preheader:                               ; preds = %2
  %broadcast.splatinsert34 = insertelement <4 x i32> poison, i32 %1, i64 0
  %broadcast.splat35 = shufflevector <4 x i32> %broadcast.splatinsert34, <4 x i32> poison, <4 x i32> zeroinitializer
  %broadcast.splatinsert36 = insertelement <4 x i32> poison, i32 %0, i64 0
  %broadcast.splat37 = shufflevector <4 x i32> %broadcast.splatinsert36, <4 x i32> poison, <4 x i32> zeroinitializer
  br label %.lr.ph29

.loopexit:                                        ; preds = %.lr.ph, %middle.block, %.lr.ph29
  %.1.lcssa = phi i32 [ %.028, %.lr.ph29 ], [ %22, %middle.block ], [ %.2, %.lr.ph ]
  %exitcond31.not = icmp eq i32 %.01727, %0
  %indvar.next = add i32 %indvar, 1
  br i1 %exitcond31.not, label %._crit_edge, label %.lr.ph29, !llvm.loop !5

._crit_edge:                                      ; preds = %.loopexit, %2
  %.0.lcssa = phi i32 [ 0, %2 ], [ %.1.lcssa, %.loopexit ]
  ret i32 %.0.lcssa

.lr.ph29:                                         ; preds = %.lr.ph29.preheader, %.loopexit
  %indvar = phi i32 [ %indvar.next, %.loopexit ], [ 0, %.lr.ph29.preheader ]
  %.028 = phi i32 [ %.1.lcssa, %.loopexit ], [ 0, %.lr.ph29.preheader ]
  %.01727 = phi i32 [ %5, %.loopexit ], [ 1, %.lr.ph29.preheader ]
  %3 = xor i32 %indvar, -1
  %4 = add i32 %3, %0
  %5 = add nuw i32 %.01727, 1
  %.not2023.not = icmp slt i32 %.01727, %0
  br i1 %.not2023.not, label %.lr.ph.preheader, label %.loopexit

.lr.ph.preheader:                                 ; preds = %.lr.ph29
  %min.iters.check = icmp ult i32 %4, 8
  br i1 %min.iters.check, label %.lr.ph.preheader38, label %vector.ph

vector.ph:                                        ; preds = %.lr.ph.preheader
  %n.vec = and i32 %4, -8
  %ind.end = add i32 %5, %n.vec
  %6 = insertelement <4 x i32> <i32 poison, i32 0, i32 0, i32 0>, i32 %.028, i64 0
  %.splatinsert = insertelement <4 x i32> poison, i32 %5, i64 0
  %.splat = shufflevector <4 x i32> %.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
  %induction = add <4 x i32> %.splat, <i32 0, i32 1, i32 2, i32 3>
  %broadcast.splatinsert = insertelement <4 x i32> poison, i32 %.01727, i64 0
  %broadcast.splat = shufflevector <4 x i32> %broadcast.splatinsert, <4 x i32> poison, <4 x i32> zeroinitializer
  br label %vector.body

vector.body:                                      ; preds = %vector.body, %vector.ph
  %index = phi i32 [ 0, %vector.ph ], [ %index.next, %vector.body ]
  %vec.phi = phi <4 x i32> [ %6, %vector.ph ], [ %19, %vector.body ]
  %vec.phi32 = phi <4 x i32> [ zeroinitializer, %vector.ph ], [ %20, %vector.body ]
  %vec.ind = phi <4 x i32> [ %induction, %vector.ph ], [ %vec.ind.next, %vector.body ]
  %step.add = add <4 x i32> %vec.ind, <i32 4, i32 4, i32 4, i32 4>
  %7 = add nuw <4 x i32> %broadcast.splat, %vec.ind
  %8 = add nuw <4 x i32> %broadcast.splat, %step.add
  %9 = sub <4 x i32> %broadcast.splat35, %7
  %10 = sub <4 x i32> %broadcast.splat35, %8
  %11 = icmp sgt <4 x i32> %9, %vec.ind
  %12 = icmp sgt <4 x i32> %10, %step.add
  %13 = icmp sle <4 x i32> %9, %broadcast.splat37
  %14 = icmp sle <4 x i32> %10, %broadcast.splat37
  %15 = and <4 x i1> %11, %13
  %16 = and <4 x i1> %12, %14
  %17 = zext <4 x i1> %15 to <4 x i32>
  %18 = zext <4 x i1> %16 to <4 x i32>
  %19 = add <4 x i32> %vec.phi, %17
  %20 = add <4 x i32> %vec.phi32, %18
  %index.next = add nuw i32 %index, 8
  %vec.ind.next = add <4 x i32> %vec.ind, <i32 8, i32 8, i32 8, i32 8>
  %21 = icmp eq i32 %index.next, %n.vec
  br i1 %21, label %middle.block, label %vector.body, !llvm.loop !7

middle.block:                                     ; preds = %vector.body
  %bin.rdx = add <4 x i32> %20, %19
  %22 = tail call i32 @llvm.vector.reduce.add.v4i32(<4 x i32> %bin.rdx)
  %cmp.n = icmp eq i32 %4, %n.vec
  br i1 %cmp.n, label %.loopexit, label %.lr.ph.preheader38

.lr.ph.preheader38:                               ; preds = %middle.block, %.lr.ph.preheader
  %.125.ph = phi i32 [ %.028, %.lr.ph.preheader ], [ %22, %middle.block ]
  %.01624.ph = phi i32 [ %5, %.lr.ph.preheader ], [ %ind.end, %middle.block ]
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader38, %.lr.ph
  %.125 = phi i32 [ %.2, %.lr.ph ], [ %.125.ph, %.lr.ph.preheader38 ]
  %.01624 = phi i32 [ %25, %.lr.ph ], [ %.01624.ph, %.lr.ph.preheader38 ]
  %23 = add nuw i32 %.01727, %.01624
  %24 = sub i32 %1, %23
  %25 = add i32 %.01624, 1
  %.not21.not = icmp sgt i32 %24, %.01624
  %.not22 = icmp sle i32 %24, %0
  %or.cond.not = and i1 %.not21.not, %.not22
  %26 = zext i1 %or.cond.not to i32
  %.2 = add nsw i32 %.125, %26
  %exitcond.not = icmp eq i32 %.01624, %0
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !10
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.vector.reduce.add.v4i32(<4 x i32>) #1

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(none) 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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = distinct !{!7, !6, !8, !9}
!8 = !{!"llvm.loop.isvectorized", i32 1}
!9 = !{!"llvm.loop.unroll.runtime.disable"}
!10 = distinct !{!10, !6, !9, !8}


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