; LLVM IR from sunkafei/xcpc-algorithm-templates :: 算法/图论/一般图最大权匹配.ll (Z7augmentii)

; 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"

@match = external dso_local global [1023 x i32], align 16
@st = external dso_local global [1023 x i32], align 16
@pa = external dso_local global [1023 x i32], align 16

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9set_matchii(i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7augmentii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %7 = load i32, ptr %3, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [1023 x i32], ptr @match, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [1023 x i32], ptr @st, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  store i32 %13, ptr %5, align 4, !tbaa !5
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z9set_matchii(i32 noundef %14, i32 noundef %15)
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %19, label %18

18:                                               ; preds = %2
  store i32 1, ptr %6, align 4
  br label %36

19:                                               ; preds = %2
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = load i32, ptr %5, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [1023 x i32], ptr @pa, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [1023 x i32], ptr @st, i64 0, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !5
  call void @_Z9set_matchii(i32 noundef %20, i32 noundef %27)
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [1023 x i32], ptr @pa, i64 0, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds [1023 x i32], ptr @st, i64 0, i64 %32
  %34 = load i32, ptr %33, align 4, !tbaa !5
  %35 = load i32, ptr %5, align 4, !tbaa !5
  call void @_Z7augmentii(i32 noundef %34, i32 noundef %35)
  store i32 0, ptr %6, align 4
  br label %36

36:                                               ; preds = %19, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  %37 = load i32, ptr %6, align 4
  switch i32 %37, label %39 [
    i32 0, label %38
    i32 1, label %38
  ]

38:                                               ; preds = %36, %36
  ret void

39:                                               ; preds = %36
  unreachable
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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"}


; 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"

@match = external dso_local local_unnamed_addr global [1023 x i32], align 16
@st = external dso_local local_unnamed_addr global [1023 x i32], align 16
@pa = external dso_local local_unnamed_addr global [1023 x i32], align 16

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z9set_matchii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z7augmentii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = sext i32 %0 to i64
  %4 = getelementptr inbounds [1023 x i32], ptr @match, i64 0, i64 %3
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds [1023 x i32], ptr @st, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  tail call void @_Z9set_matchii(i32 noundef %0, i32 noundef %1)
  %.not9 = icmp eq i32 %8, 0
  br i1 %.not9, label %tailrecurse._crit_edge, label %tailrecurse

tailrecurse:                                      ; preds = %2, %tailrecurse
  %9 = phi i32 [ %25, %tailrecurse ], [ %8, %2 ]
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [1023 x i32], ptr @pa, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [1023 x i32], ptr @st, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  tail call void @_Z9set_matchii(i32 noundef %9, i32 noundef %15)
  %16 = load i32, ptr %11, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [1023 x i32], ptr @st, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [1023 x i32], ptr @match, i64 0, i64 %20
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [1023 x i32], ptr @st, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  tail call void @_Z9set_matchii(i32 noundef %19, i32 noundef %9)
  %.not = icmp eq i32 %25, 0
  br i1 %.not, label %tailrecurse._crit_edge, label %tailrecurse

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %2
  ret void
}

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 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass