; LLVM IR from AdarshGaur/Competitive-Programming :: Algorithm Library/Strings/Hashing.ll (Z6modpowiii)

; 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 @_Z6modpowiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = icmp slt i32 %8, 0
  br i1 %9, label %10, label %14

10:                                               ; preds = %3
  %11 = load i32, ptr %6, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = add nsw i32 %12, %11
  store i32 %13, ptr %4, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %10, %3
  %15 = load i32, ptr %6, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = srem i32 %16, %15
  store i32 %17, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 1, ptr %7, align 4, !tbaa !5
  br label %18

18:                                               ; preds = %36, %14
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = icmp ne i32 %19, 0
  br i1 %20, label %21, label %49

21:                                               ; preds = %18
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = and i32 %22, 1
  %24 = icmp ne i32 %23, 0
  br i1 %24, label %25, label %36

25:                                               ; preds = %21
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = mul nsw i64 %27, 1
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = mul nsw i64 %28, %30
  %32 = load i32, ptr %6, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = srem i64 %31, %33
  %35 = trunc i64 %34 to i32
  store i32 %35, ptr %7, align 4, !tbaa !5
  br label %36

36:                                               ; preds = %25, %21
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = mul nsw i64 %38, 1
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = sext i32 %40 to i64
  %42 = mul nsw i64 %39, %41
  %43 = load i32, ptr %6, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = srem i64 %42, %44
  %46 = trunc i64 %45 to i32
  store i32 %46, ptr %4, align 4, !tbaa !5
  %47 = load i32, ptr %5, align 4, !tbaa !5
  %48 = ashr i32 %47, 1
  store i32 %48, ptr %5, align 4, !tbaa !5
  br label %18, !llvm.loop !9

49:                                               ; preds = %18
  %50 = load i32, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %50
}

; 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"}


; 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 range(i32 -2147483647, -2147483648) i32 @_Z6modpowiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not21 = icmp eq i32 %1, 0
  br i1 %.not21, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %3
  %4 = icmp slt i32 %0, 0
  %5 = select i1 %4, i32 %2, i32 0
  %spec.select = add nsw i32 %5, %0
  %6 = srem i32 %spec.select, %2
  %7 = sext i32 %2 to i64
  br label %8

8:                                                ; preds = %.lr.ph, %16
  %.024 = phi i32 [ 1, %.lr.ph ], [ %.1, %16 ]
  %.11623 = phi i32 [ %6, %.lr.ph ], [ %19, %16 ]
  %.01722 = phi i32 [ %1, %.lr.ph ], [ %20, %16 ]
  %9 = and i32 %.01722, 1
  %.not20 = icmp eq i32 %9, 0
  br i1 %.not20, label %._crit_edge25, label %10

._crit_edge25:                                    ; preds = %8
  %.pre = sext i32 %.11623 to i64
  br label %16

10:                                               ; preds = %8
  %11 = sext i32 %.024 to i64
  %12 = sext i32 %.11623 to i64
  %13 = mul nsw i64 %11, %12
  %14 = srem i64 %13, %7
  %15 = trunc nsw i64 %14 to i32
  br label %16

16:                                               ; preds = %._crit_edge25, %10
  %.pre-phi = phi i64 [ %.pre, %._crit_edge25 ], [ %12, %10 ]
  %.1 = phi i32 [ %.024, %._crit_edge25 ], [ %15, %10 ]
  %17 = mul nsw i64 %.pre-phi, %.pre-phi
  %18 = srem i64 %17, %7
  %19 = trunc nsw i64 %18 to i32
  %20 = ashr i32 %.01722, 1
  %.not = icmp ult i32 %.01722, 2
  br i1 %.not, label %._crit_edge, label %8, !llvm.loop !5

._crit_edge:                                      ; preds = %16, %3
  %.0.lcssa = phi i32 [ 1, %3 ], [ %.1, %16 ]
  ret i32 %.0.lcssa
}

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" }

!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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass