; LLVM IR from ravireddy07/cpp-book :: src/Code-Chef/MARBLES.ll (Z3nCrmm)

; 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 uwtable
declare dso_local noundef i64 @_Z3gcdmm(i64 noundef, i64 noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z3nCrmm(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i32, align 4
  %8 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  store i64 1, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 1, ptr %7, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %37, %2
  %10 = load i32, ptr %7, align 4, !tbaa !9
  %11 = sext i32 %10 to i64
  %12 = load i64, ptr %4, align 8, !tbaa !5
  %13 = icmp ule i64 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %40

15:                                               ; preds = %9
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = load i64, ptr %4, align 8, !tbaa !5
  %18 = sub i64 %16, %17
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = sext i32 %19 to i64
  %21 = add i64 %18, %20
  %22 = load i64, ptr %5, align 8, !tbaa !5
  %23 = mul i64 %22, %21
  store i64 %23, ptr %5, align 8, !tbaa !5
  %24 = load i32, ptr %7, align 4, !tbaa !9
  %25 = sext i32 %24 to i64
  %26 = load i64, ptr %6, align 8, !tbaa !5
  %27 = mul i64 %26, %25
  store i64 %27, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #2
  %28 = load i64, ptr %5, align 8, !tbaa !5
  %29 = load i64, ptr %6, align 8, !tbaa !5
  %30 = call noundef i64 @_Z3gcdmm(i64 noundef %28, i64 noundef %29)
  store i64 %30, ptr %8, align 8, !tbaa !5
  %31 = load i64, ptr %8, align 8, !tbaa !5
  %32 = load i64, ptr %5, align 8, !tbaa !5
  %33 = udiv i64 %32, %31
  store i64 %33, ptr %5, align 8, !tbaa !5
  %34 = load i64, ptr %8, align 8, !tbaa !5
  %35 = load i64, ptr %6, align 8, !tbaa !5
  %36 = udiv i64 %35, %34
  store i64 %36, ptr %6, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #2
  br label %37

37:                                               ; preds = %15
  %38 = load i32, ptr %7, align 4, !tbaa !9
  %39 = add nsw i32 %38, 1
  store i32 %39, ptr %7, align 4, !tbaa !9
  br label %9, !llvm.loop !11

40:                                               ; preds = %14
  %41 = load i64, ptr %5, align 8, !tbaa !5
  %42 = load i64, ptr %6, align 8, !tbaa !5
  %43 = udiv i64 %41, %42
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %43
}

; 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 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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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 uwtable
declare dso_local noundef i64 @_Z3gcdmm(i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_Z3nCrmm(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %.not21 = icmp eq i64 %1, 0
  br i1 %.not21, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %3 = sub i64 %0, %1
  br label %6

._crit_edge.loopexit:                             ; preds = %6
  %4 = udiv i64 %11, %12
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %2
  %5 = phi i64 [ 1, %2 ], [ %4, %._crit_edge.loopexit ]
  ret i64 %5

6:                                                ; preds = %.lr.ph, %6
  %indvars.iv = phi i64 [ 1, %.lr.ph ], [ %indvars.iv.next, %6 ]
  %.024 = phi i64 [ 1, %.lr.ph ], [ %11, %6 ]
  %.01822 = phi i64 [ 1, %.lr.ph ], [ %12, %6 ]
  %7 = add i64 %3, %indvars.iv
  %8 = mul i64 %7, %.024
  %9 = mul i64 %indvars.iv, %.01822
  %10 = tail call noundef i64 @_Z3gcdmm(i64 noundef %8, i64 noundef %9)
  %11 = udiv i64 %8, %10
  %12 = udiv i64 %9, %10
  %indvars.iv.next = add nuw i64 %indvars.iv, 1
  %exitcond = icmp eq i64 %indvars.iv, %1
  br i1 %exitcond, label %._crit_edge.loopexit, label %6, !llvm.loop !5
}

attributes #0 = { 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" }

!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,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass