; LLVM IR from UtkarshPathrabe/Competitive-Coding :: Model Algorithms/Backtracking/Rat In A Maze.ll (Z6IsSafeii)

; 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"

@rows = external dso_local global i32, align 4
@columns = external dso_local global i32, align 4
@Maze = external dso_local global [100 x [100 x i32]], align 16
@Sol = external dso_local global [100 x [100 x i32]], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef zeroext i1 @_Z6IsSafeii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i1, align 1
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %6 = load i32, ptr %4, align 4, !tbaa !5
  %7 = icmp sge i32 %6, 0
  br i1 %7, label %8, label %38

8:                                                ; preds = %2
  %9 = load i32, ptr %4, align 4, !tbaa !5
  %10 = load i32, ptr @rows, align 4, !tbaa !5
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %12, label %38

12:                                               ; preds = %8
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = icmp sge i32 %13, 0
  br i1 %14, label %15, label %38

15:                                               ; preds = %12
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = load i32, ptr @columns, align 4, !tbaa !5
  %18 = icmp slt i32 %16, %17
  br i1 %18, label %19, label %38

19:                                               ; preds = %15
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [100 x [100 x i32]], ptr @Maze, i64 0, i64 %21
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [100 x i32], ptr %22, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = icmp eq i32 %26, 1
  br i1 %27, label %28, label %38

28:                                               ; preds = %19
  %29 = load i32, ptr %4, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [100 x [100 x i32]], ptr @Sol, i64 0, i64 %30
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [100 x i32], ptr %31, i64 0, i64 %33
  %35 = load i32, ptr %34, align 4, !tbaa !5
  %36 = icmp eq i32 %35, 0
  br i1 %36, label %37, label %38

37:                                               ; preds = %28
  store i1 true, ptr %3, align 1
  br label %39

38:                                               ; preds = %28, %19, %15, %12, %8, %2
  store i1 false, ptr %3, align 1
  br label %39

39:                                               ; preds = %38, %37
  %40 = load i1, ptr %3, align 1
  ret i1 %40
}

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 = !{!"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"

@rows = external dso_local local_unnamed_addr global i32, align 4
@columns = external dso_local local_unnamed_addr global i32, align 4
@Maze = external dso_local local_unnamed_addr global [100 x [100 x i32]], align 16
@Sol = external dso_local local_unnamed_addr global [100 x [100 x i32]], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef zeroext i1 @_Z6IsSafeii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %0, -1
  br i1 %3, label %4, label %20

4:                                                ; preds = %2
  %5 = load i32, ptr @rows, align 4, !tbaa !5
  %6 = icmp sgt i32 %5, %0
  %7 = icmp sgt i32 %1, -1
  %or.cond = and i1 %7, %6
  %8 = load i32, ptr @columns, align 4
  %9 = icmp sgt i32 %8, %1
  %or.cond12 = select i1 %or.cond, i1 %9, i1 false
  br i1 %or.cond12, label %10, label %20

10:                                               ; preds = %4
  %11 = zext nneg i32 %0 to i64
  %12 = zext nneg i32 %1 to i64
  %13 = getelementptr inbounds [100 x [100 x i32]], ptr @Maze, i64 0, i64 %11, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = icmp eq i32 %14, 1
  br i1 %15, label %16, label %20

16:                                               ; preds = %10
  %17 = getelementptr inbounds [100 x [100 x i32]], ptr @Sol, i64 0, i64 %11, i64 %12
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %21, label %20

20:                                               ; preds = %16, %10, %4, %2
  br label %21

21:                                               ; preds = %16, %20
  %.0 = phi i1 [ false, %20 ], [ true, %16 ]
  ret i1 %.0
}

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


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