; LLVM IR from djeada/Algorithms-And-Data-Structures :: src/dynamic_programming/cpp/grid_traveler/src (grid_travelers)

; 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 uwtable
define dso_local noundef i32 @_Z18gridTravelersBasicii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %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 eq i32 %6, 0
  br i1 %7, label %11, label %8

8:                                                ; preds = %2
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = icmp eq i32 %9, 0
  br i1 %10, label %11, label %12

11:                                               ; preds = %8, %2
  store i32 0, ptr %3, align 4
  br label %31

12:                                               ; preds = %8
  %13 = load i32, ptr %4, align 4, !tbaa !5
  %14 = icmp slt i32 %13, 2
  br i1 %14, label %15, label %21

15:                                               ; preds = %12
  %16 = load i32, ptr %5, align 4, !tbaa !5
  %17 = icmp slt i32 %16, 2
  br i1 %17, label %18, label %21

18:                                               ; preds = %15
  %19 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %20 = load i32, ptr %19, align 4, !tbaa !5
  store i32 %20, ptr %3, align 4
  br label %31

21:                                               ; preds = %15, %12
  %22 = load i32, ptr %4, align 4, !tbaa !5
  %23 = sub nsw i32 %22, 1
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = call noundef i32 @_Z18gridTravelersBasicii(i32 noundef %23, i32 noundef %24)
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = load i32, ptr %5, align 4, !tbaa !5
  %28 = sub nsw i32 %27, 1
  %29 = call noundef i32 @_Z18gridTravelersBasicii(i32 noundef %26, i32 noundef %28)
  %30 = add nsw i32 %25, %29
  store i32 %30, ptr %3, align 4
  br label %31

31:                                               ; preds = %21, %18, %11
  %32 = load i32, ptr %3, align 4
  ret i32 %32
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1

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" }
attributes #1 = { inlinehint 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"

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z18gridTravelersBasicii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = icmp eq i32 %0, 0
  %6 = icmp eq i32 %1, 0
  %or.cond11 = or i1 %5, %6
  br i1 %or.cond11, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %2
  %7 = icmp slt i32 %0, 2
  %8 = add nsw i32 %0, -1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %tailrecurse
  %.tr614 = phi i32 [ %14, %tailrecurse ], [ %1, %.lr.ph.preheader ]
  %accumulator.tr12 = phi i32 [ %15, %tailrecurse ], [ 0, %.lr.ph.preheader ]
  %9 = icmp slt i32 %.tr614, 2
  %or.cond3 = and i1 %7, %9
  br i1 %or.cond3, label %10, label %tailrecurse

10:                                               ; preds = %.lr.ph
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %.tr614, ptr %4, align 4, !tbaa !5
  %11 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %4, ptr noundef nonnull align 4 dereferenceable(4) %3)
  %12 = load i32, ptr %11, align 4, !tbaa !5
  br label %.loopexit

tailrecurse:                                      ; preds = %.lr.ph
  %13 = tail call noundef i32 @_Z18gridTravelersBasicii(i32 noundef %8, i32 noundef %.tr614)
  %14 = add nsw i32 %.tr614, -1
  %15 = add nsw i32 %13, %accumulator.tr12
  %16 = icmp eq i32 %14, 0
  br i1 %16, label %.loopexit, label %.lr.ph

.loopexit:                                        ; preds = %tailrecurse, %2, %10
  %accumulator.tr8 = phi i32 [ %accumulator.tr12, %10 ], [ 0, %2 ], [ %15, %tailrecurse ]
  %.0 = phi i32 [ %12, %10 ], [ 0, %2 ], [ 0, %tailrecurse ]
  %accumulator.ret.tr = add nsw i32 %.0, %accumulator.tr8
  ret i32 %accumulator.ret.tr
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

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 = { inlinehint 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"}


; Effective O3 passes: DSEPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass