; LLVM IR from ippeb/ACM-ICPC :: algebra/bignum/bignum.ll (Z7shift10R6bignumi)

; 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.bignum = type { [12 x i64], i32 }

; 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
declare dso_local void @_Z4baseR6bignumPc(ptr noundef nonnull align 8 dereferenceable(104), ptr noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z4multR6bignumS0_S0_(ptr noundef nonnull align 8 dereferenceable(104), ptr noundef nonnull align 8 dereferenceable(104), ptr noundef nonnull align 8 dereferenceable(104)) #2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7shift10R6bignumi(ptr noundef nonnull align 8 dereferenceable(104) %0, i32 noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca [108 x i8], align 16
  %6 = alloca i32, align 4
  %7 = alloca %struct.bignum, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 108, ptr %5) #3
  %8 = getelementptr inbounds [108 x i8], ptr %5, i64 0, i64 0
  store i8 49, ptr %8, align 16, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 1, ptr %6, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %18, %2
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = icmp sle i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %21

14:                                               ; preds = %9
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [108 x i8], ptr %5, i64 0, i64 %16
  store i8 48, ptr %17, align 1, !tbaa !11
  br label %18

18:                                               ; preds = %14
  %19 = load i32, ptr %6, align 4, !tbaa !9
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr %6, align 4, !tbaa !9
  br label %9, !llvm.loop !12

21:                                               ; preds = %13
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [108 x i8], ptr %5, i64 0, i64 %24
  store i8 0, ptr %25, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 104, ptr %7) #3
  %26 = getelementptr inbounds [108 x i8], ptr %5, i64 0, i64 0
  call void @_Z4baseR6bignumPc(ptr noundef nonnull align 8 dereferenceable(104) %7, ptr noundef %26)
  %27 = load ptr, ptr %3, align 8, !tbaa !5
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  call void @_Z4multR6bignumS0_S0_(ptr noundef nonnull align 8 dereferenceable(104) %27, ptr noundef nonnull align 8 dereferenceable(104) %7, ptr noundef nonnull align 8 dereferenceable(104) %28)
  call void @llvm.lifetime.end.p0(i64 104, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 108, ptr %5) #3
  ret void
}

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 = { mustprogress 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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"

%struct.bignum = type { [12 x i64], i32 }

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z4baseR6bignumPc(ptr noundef nonnull align 8 dereferenceable(104), ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z4multR6bignumS0_S0_(ptr noundef nonnull align 8 dereferenceable(104), ptr noundef nonnull align 8 dereferenceable(104), ptr noundef nonnull align 8 dereferenceable(104)) local_unnamed_addr #2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7shift10R6bignumi(ptr noundef nonnull align 8 dereferenceable(104) %0, i32 noundef %1) local_unnamed_addr #2 {
  %3 = alloca [108 x i8], align 16
  %4 = alloca %struct.bignum, align 8
  call void @llvm.lifetime.start.p0(i64 108, ptr nonnull %3) #4
  store i8 49, ptr %3, align 16, !tbaa !5
  %.not7 = icmp slt i32 %1, 1
  br i1 %.not7, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %scevgep = getelementptr inbounds i8, ptr %3, i64 1
  %5 = zext nneg i32 %1 to i64
  call void @llvm.memset.p0.i64(ptr nonnull align 1 %scevgep, i8 48, i64 %5, i1 false), !tbaa !5
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph.preheader, %2
  %6 = add nsw i32 %1, 1
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds [108 x i8], ptr %3, i64 0, i64 %7
  store i8 0, ptr %8, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 104, ptr nonnull %4) #4
  call void @_Z4baseR6bignumPc(ptr noundef nonnull align 8 dereferenceable(104) %4, ptr noundef nonnull %3)
  call void @_Z4multR6bignumS0_S0_(ptr noundef nonnull align 8 dereferenceable(104) %0, ptr noundef nonnull align 8 dereferenceable(104) %4, ptr noundef nonnull align 8 dereferenceable(104) %0)
  call void @llvm.lifetime.end.p0(i64 104, ptr nonnull %4) #4
  call void @llvm.lifetime.end.p0(i64 108, ptr nonnull %3) #4
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

attributes #0 = { mustprogress 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 = { mustprogress 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 #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { 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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,SROAPass,SimplifyCFGPass