; LLVM IR from bqi343/cp-notebook :: Contests/USACO Solutions/2011-12/stack.ll (Z4fdivxx)

; 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 i64 @_Z4fdivxx(i64 noundef %0, i64 noundef %1) #0 {
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  store i64 %0, ptr %3, align 8, !tbaa !5
  store i64 %1, ptr %4, align 8, !tbaa !5
  %5 = load i64, ptr %3, align 8, !tbaa !5
  %6 = load i64, ptr %4, align 8, !tbaa !5
  %7 = sdiv i64 %5, %6
  %8 = load i64, ptr %3, align 8, !tbaa !5
  %9 = load i64, ptr %4, align 8, !tbaa !5
  %10 = xor i64 %8, %9
  %11 = icmp slt i64 %10, 0
  br i1 %11, label %12, label %17

12:                                               ; preds = %2
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = load i64, ptr %4, align 8, !tbaa !5
  %15 = srem i64 %13, %14
  %16 = icmp ne i64 %15, 0
  br label %17

17:                                               ; preds = %12, %2
  %18 = phi i1 [ false, %2 ], [ %16, %12 ]
  %19 = zext i1 %18 to i64
  %20 = sub nsw i64 %7, %19
  ret i64 %20
}

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" }

!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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(none) uwtable
define dso_local noundef i64 @_Z4fdivxx(i64 noundef %0, i64 noundef %1) local_unnamed_addr #0 {
  %3 = xor i64 %1, %0
  %4 = icmp slt i64 %3, 0
  %5 = sdiv i64 %0, %1
  %6 = srem i64 %0, %1
  %7 = icmp ne i64 %6, 0
  %.neg = sext i1 %7 to i64
  %.neg6 = select i1 %4, i64 %.neg, i64 0
  %8 = add i64 %5, %.neg6
  ret i64 %8
}

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)"}


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