; LLVM IR from alekmaul/pvsneslib :: snes-examples/maps/DynamicMap (map64x64)

; 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"

@spritemap64x64_len = external dso_local global i16, align 2
@spritemap64x64 = external dso_local global ptr, align 8

; Function Attrs: nounwind uwtable
define dso_local void @initSpriteMap64x64() #0 {
  %1 = alloca i16, align 2
  call void @llvm.lifetime.start.p0(i64 2, ptr %1) #2
  store i16 0, ptr %1, align 2, !tbaa !5
  br label %2

2:                                                ; preds = %13, %0
  %3 = load i16, ptr %1, align 2, !tbaa !5
  %4 = zext i16 %3 to i32
  %5 = load i16, ptr @spritemap64x64_len, align 2, !tbaa !5
  %6 = zext i16 %5 to i32
  %7 = icmp slt i32 %4, %6
  br i1 %7, label %8, label %16

8:                                                ; preds = %2
  %9 = load ptr, ptr @spritemap64x64, align 8, !tbaa !9
  %10 = load i16, ptr %1, align 2, !tbaa !5
  %11 = zext i16 %10 to i64
  %12 = getelementptr inbounds i16, ptr %9, i64 %11
  store i16 0, ptr %12, align 2, !tbaa !5
  br label %13

13:                                               ; preds = %8
  %14 = load i16, ptr %1, align 2, !tbaa !5
  %15 = add i16 %14, 1
  store i16 %15, ptr %1, align 2, !tbaa !5
  br label %2, !llvm.loop !11

16:                                               ; preds = %2
  call void @llvm.lifetime.end.p0(i64 2, ptr %1) #2
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"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"

@spritemap64x64_len = external dso_local local_unnamed_addr global i16, align 2
@spritemap64x64 = external dso_local local_unnamed_addr global ptr, align 8

; Function Attrs: nofree norecurse nosync nounwind memory(readwrite, argmem: write, inaccessiblemem: none) uwtable
define dso_local void @initSpriteMap64x64() local_unnamed_addr #0 {
  %1 = load i16, ptr @spritemap64x64_len, align 2, !tbaa !5
  %.not = icmp eq i16 %1, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0
  %2 = load ptr, ptr @spritemap64x64, align 8, !tbaa !9
  br label %3

3:                                                ; preds = %.lr.ph, %3
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %3 ]
  %4 = getelementptr inbounds i16, ptr %2, i64 %indvars.iv
  store i16 0, ptr %4, align 2, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %5 = load i16, ptr @spritemap64x64_len, align 2, !tbaa !5
  %6 = zext i16 %5 to i64
  %7 = icmp ult i64 %indvars.iv.next, %6
  br i1 %7, label %3, label %._crit_edge, !llvm.loop !11

._crit_edge:                                      ; preds = %3, %0
  ret void
}

attributes #0 = { nofree norecurse nosync nounwind memory(readwrite, argmem: write, 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 = !{!"short", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass