; LLVM IR from tangjz/acm-icpc :: 51nod/1778.ll (Z3remiPii)

; 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 @_Z3remiPii(i32 noundef %0, ptr noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = sub nsw i32 %9, 1
  store i32 %10, ptr %8, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %26, %3
  %12 = load i32, ptr %8, align 4, !tbaa !5
  %13 = icmp sge i32 %12, 0
  br i1 %13, label %15, label %14

14:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %29

15:                                               ; preds = %11
  %16 = load i32, ptr %7, align 4, !tbaa !5
  %17 = mul nsw i32 %16, 10
  %18 = load ptr, ptr %5, align 8, !tbaa !9
  %19 = load i32, ptr %8, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds i32, ptr %18, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = add nsw i32 %17, %22
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = srem i32 %23, %24
  store i32 %25, ptr %7, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %15
  %27 = load i32, ptr %8, align 4, !tbaa !5
  %28 = add nsw i32 %27, -1
  store i32 %28, ptr %8, align 4, !tbaa !5
  br label %11, !llvm.loop !11

29:                                               ; preds = %14
  %30 = load i32, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %30
}

; 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 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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 @_Z3remiPii(i32 noundef %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %0, 0
  br i1 %4, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %5 = zext nneg i32 %0 to i64
  %xtraiter = and i64 %5, 1
  %6 = icmp eq i32 %0, 1
  br i1 %6, label %._crit_edge.loopexit.unr-lcssa, label %.lr.ph.preheader.new

.lr.ph.preheader.new:                             ; preds = %.lr.ph.preheader
  %unroll_iter = and i64 %5, 2147483646
  %invariant.gep = getelementptr i8, ptr %1, i64 -4
  br label %.lr.ph

._crit_edge.loopexit.unr-lcssa.loopexit:          ; preds = %.lr.ph
  %7 = mul nsw i32 %21, 10
  br label %._crit_edge.loopexit.unr-lcssa

._crit_edge.loopexit.unr-lcssa:                   ; preds = %._crit_edge.loopexit.unr-lcssa.loopexit, %.lr.ph.preheader
  %.lcssa.ph = phi i32 [ poison, %.lr.ph.preheader ], [ %21, %._crit_edge.loopexit.unr-lcssa.loopexit ]
  %indvars.iv.unr = phi i64 [ %5, %.lr.ph.preheader ], [ %indvars.iv.next.1, %._crit_edge.loopexit.unr-lcssa.loopexit ]
  %.078.unr = phi i32 [ 0, %.lr.ph.preheader ], [ %7, %._crit_edge.loopexit.unr-lcssa.loopexit ]
  %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
  %8 = getelementptr i32, ptr %1, i64 %indvars.iv.unr
  %9 = getelementptr i8, ptr %8, i64 -4
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = add nsw i32 %10, %.078.unr
  %12 = srem i32 %11, %2
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.epil, %._crit_edge.loopexit.unr-lcssa, %3
  %.07.lcssa = phi i32 [ 0, %3 ], [ %.lcssa.ph, %._crit_edge.loopexit.unr-lcssa ], [ %12, %.lr.ph.epil ]
  ret i32 %.07.lcssa

.lr.ph:                                           ; preds = %.lr.ph, %.lr.ph.preheader.new
  %indvars.iv = phi i64 [ %5, %.lr.ph.preheader.new ], [ %indvars.iv.next.1, %.lr.ph ]
  %.078 = phi i32 [ 0, %.lr.ph.preheader.new ], [ %21, %.lr.ph ]
  %niter = phi i64 [ 0, %.lr.ph.preheader.new ], [ %niter.next.1, %.lr.ph ]
  %13 = mul nsw i32 %.078, 10
  %gep = getelementptr i32, ptr %invariant.gep, i64 %indvars.iv
  %14 = load i32, ptr %gep, align 4, !tbaa !5
  %15 = add nsw i32 %14, %13
  %16 = srem i32 %15, %2
  %indvars.iv.next.1 = add nsw i64 %indvars.iv, -2
  %17 = mul nsw i32 %16, 10
  %18 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv.next.1
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = add nsw i32 %19, %17
  %21 = srem i32 %20, %2
  %niter.next.1 = add i64 %niter, 2
  %niter.ncmp.1.not = icmp eq i64 %niter.next.1, %unroll_iter
  br i1 %niter.ncmp.1.not, label %._crit_edge.loopexit.unr-lcssa.loopexit, label %.lr.ph, !llvm.loop !9
}

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 = !{!"int", !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,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass