; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/高精度/分数类.ll (Z3abs4frac)

; 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.frac = type { i64, i64 }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4fracC2Exx(ptr noundef nonnull align 8 dereferenceable(16), i64 noundef, i64 noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local { i64, i64 } @_Z3abs4frac(i64 %0, i64 %1) #1 {
  %3 = alloca %struct.frac, align 8
  %4 = alloca %struct.frac, align 8
  %5 = getelementptr inbounds { i64, i64 }, ptr %4, i32 0, i32 0
  store i64 %0, ptr %5, align 8
  %6 = getelementptr inbounds { i64, i64 }, ptr %4, i32 0, i32 1
  store i64 %1, ptr %6, align 8
  %7 = getelementptr inbounds %struct.frac, ptr %4, i32 0, i32 0
  %8 = load i64, ptr %7, align 8, !tbaa !5
  %9 = icmp slt i64 %8, 0
  br i1 %9, label %10, label %16

10:                                               ; preds = %2
  %11 = getelementptr inbounds %struct.frac, ptr %4, i32 0, i32 0
  %12 = load i64, ptr %11, align 8, !tbaa !5
  %13 = sub nsw i64 0, %12
  %14 = getelementptr inbounds %struct.frac, ptr %4, i32 0, i32 1
  %15 = load i64, ptr %14, align 8, !tbaa !10
  call void @_ZN4fracC2Exx(ptr noundef nonnull align 8 dereferenceable(16) %3, i64 noundef %13, i64 noundef %15)
  br label %17

16:                                               ; preds = %2
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %3, ptr align 8 %4, i64 16, i1 false), !tbaa.struct !11
  br label %17

17:                                               ; preds = %16, %10
  %18 = load { i64, i64 }, ptr %3, align 8
  ret { i64, i64 } %18
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #2

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 = { 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 #2 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }

!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, !7, i64 0}
!6 = !{!"_ZTS4frac", !7, i64 0, !7, i64 8}
!7 = !{!"long long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!6, !7, i64 8}
!11 = !{i64 0, i64 8, !12, i64 8, i64 8, !12}
!12 = !{!7, !7, i64 0}


; 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.frac = type { i64, i64 }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4fracC2Exx(ptr noundef nonnull align 8 dereferenceable(16), i64 noundef, i64 noundef) unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local { i64, i64 } @_Z3abs4frac(i64 %0, i64 %1) local_unnamed_addr #0 {
  %3 = alloca %struct.frac, align 8
  %4 = icmp slt i64 %0, 0
  br i1 %4, label %5, label %7

5:                                                ; preds = %2
  %6 = sub nsw i64 0, %0
  call void @_ZN4fracC2Exx(ptr noundef nonnull align 8 dereferenceable(16) %3, i64 noundef %6, i64 noundef %1)
  %.fca.0.load.pre = load i64, ptr %3, align 8
  %.fca.1.gep.phi.trans.insert = getelementptr inbounds i8, ptr %3, i64 8
  %.fca.1.load.pre = load i64, ptr %.fca.1.gep.phi.trans.insert, align 8
  br label %7

7:                                                ; preds = %2, %5
  %.fca.1.load = phi i64 [ %.fca.1.load.pre, %5 ], [ %1, %2 ]
  %.fca.0.load = phi i64 [ %.fca.0.load.pre, %5 ], [ %0, %2 ]
  %.fca.0.insert = insertvalue { i64, i64 } poison, i64 %.fca.0.load, 0
  %.fca.1.insert = insertvalue { i64, i64 } %.fca.0.insert, i64 %.fca.1.load, 1
  ret { i64, i64 } %.fca.1.insert
}

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)"}


; Effective O3 passes: BDCEPass,DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass