; LLVM IR from tangjz/acm-icpc :: 51nod/1121.ll (Z7mod_mulxx)

; 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"

@pp = external dso_local global i64, align 8

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i64 @_Z7mod_mulxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = 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
  %6 = load i64, ptr %3, align 8, !tbaa !5
  %7 = load i64, ptr %4, align 8, !tbaa !5
  %8 = mul nsw i64 %6, %7
  %9 = load i64, ptr %3, align 8, !tbaa !5
  %10 = sitofp i64 %9 to x86_fp80
  %11 = load i64, ptr %4, align 8, !tbaa !5
  %12 = sitofp i64 %11 to x86_fp80
  %13 = fmul x86_fp80 %10, %12
  %14 = load i64, ptr @pp, align 8, !tbaa !5
  %15 = sitofp i64 %14 to x86_fp80
  %16 = fdiv x86_fp80 %13, %15
  %17 = fadd x86_fp80 %16, 0xK3FF8A3D70A3D70A3D800
  %18 = fptosi x86_fp80 %17 to i64
  %19 = load i64, ptr @pp, align 8, !tbaa !5
  %20 = mul nsw i64 %18, %19
  %21 = sub nsw i64 %8, %20
  store i64 %21, ptr %5, align 8, !tbaa !5
  %22 = load i64, ptr %5, align 8, !tbaa !5
  %23 = icmp slt i64 %22, 0
  br i1 %23, label %24, label %28

24:                                               ; preds = %2
  %25 = load i64, ptr @pp, align 8, !tbaa !5
  %26 = load i64, ptr %5, align 8, !tbaa !5
  %27 = add nsw i64 %26, %25
  store i64 %27, ptr %5, align 8, !tbaa !5
  br label %28

28:                                               ; preds = %24, %2
  %29 = load i64, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  ret i64 %29
}

; 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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; 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"

@pp = external dso_local local_unnamed_addr global i64, align 8

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef i64 @_Z7mod_mulxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = mul nsw i64 %1, %0
  %4 = sitofp i64 %0 to x86_fp80
  %5 = sitofp i64 %1 to x86_fp80
  %6 = fmul x86_fp80 %4, %5
  %7 = load i64, ptr @pp, align 8, !tbaa !5
  %8 = sitofp i64 %7 to x86_fp80
  %9 = fdiv x86_fp80 %6, %8
  %10 = fadd x86_fp80 %9, 0xK3FF8A3D70A3D70A3D800
  %11 = fptosi x86_fp80 %10 to i64
  %12 = mul nsw i64 %7, %11
  %13 = sub nsw i64 %3, %12
  %14 = icmp slt i64 %13, 0
  %15 = select i1 %14, i64 %7, i64 0
  %spec.select = add nsw i64 %15, %13
  ret i64 %spec.select
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: 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 = !{!6, !6, i64 0}
!6 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass