; LLVM IR from totte174/minesolve :: src (equations)

; 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: 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: nounwind uwtable
declare dso_local zeroext i1 @remove_solved(ptr noundef, ptr noundef) #1

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @remove_subequations(ptr noundef) #1

; Function Attrs: nounwind uwtable
define dso_local i32 @reduce(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i8, align 1
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 1, ptr %4) #2
  store i8 1, ptr %4, align 1, !tbaa !11
  br label %5

5:                                                ; preds = %14, %1
  %6 = load i8, ptr %4, align 1, !tbaa !11, !range !13, !noundef !14
  %7 = trunc i8 %6 to i1
  br i1 %7, label %8, label %12

8:                                                ; preds = %5
  %9 = load i32, ptr %3, align 4, !tbaa !9
  %10 = icmp ne i32 %9, 0
  %11 = xor i1 %10, true
  br label %12

12:                                               ; preds = %8, %5
  %13 = phi i1 [ false, %5 ], [ %11, %8 ]
  br i1 %13, label %14, label %33

14:                                               ; preds = %12
  store i8 0, ptr %4, align 1, !tbaa !11
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  %16 = call zeroext i1 @remove_subequations(ptr noundef %15)
  %17 = zext i1 %16 to i32
  %18 = load i8, ptr %4, align 1, !tbaa !11, !range !13, !noundef !14
  %19 = trunc i8 %18 to i1
  %20 = zext i1 %19 to i32
  %21 = or i32 %20, %17
  %22 = icmp ne i32 %21, 0
  %23 = zext i1 %22 to i8
  store i8 %23, ptr %4, align 1, !tbaa !11
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = call zeroext i1 @remove_solved(ptr noundef %24, ptr noundef %3)
  %26 = zext i1 %25 to i32
  %27 = load i8, ptr %4, align 1, !tbaa !11, !range !13, !noundef !14
  %28 = trunc i8 %27 to i1
  %29 = zext i1 %28 to i32
  %30 = or i32 %29, %26
  %31 = icmp ne i32 %30, 0
  %32 = zext i1 %31 to i8
  store i8 %32, ptr %4, align 1, !tbaa !11
  br label %5, !llvm.loop !15

33:                                               ; preds = %12
  %34 = load i32, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 1, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %34
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"_Bool", !7, i64 0}
!13 = !{i8 0, i8 2}
!14 = !{}
!15 = distinct !{!15, !16}
!16 = !{!"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 nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

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

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @remove_solved(ptr noundef, ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local zeroext i1 @remove_subequations(ptr noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @reduce(ptr noundef %0) local_unnamed_addr #1 {
.lr.ph.preheader:
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #2
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %2 = call zeroext i1 @remove_subequations(ptr noundef %0)
  %3 = call zeroext i1 @remove_solved(ptr noundef %0, ptr noundef nonnull %1)
  %4 = or i1 %2, %3
  %5 = load i32, ptr %1, align 4
  %.not = icmp eq i32 %5, 0
  %6 = select i1 %4, i1 %.not, i1 false
  br i1 %6, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #2
  ret i32 %5
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SCCPPass,SROAPass,SimplifyCFGPass