; LLVM IR from Stephane-D/SGDK :: src (mapper)

; 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"

@region = external hidden global i8, align 1

; Function Attrs: nounwind uwtable
define dso_local void @SYS_resetBanks() #0 {
  %1 = alloca i16, align 2
  call void @llvm.lifetime.start.p0(i64 2, ptr %1) #2
  store i16 8, ptr %1, align 2, !tbaa !5
  br label %2

2:                                                ; preds = %6, %0
  %3 = load i16, ptr %1, align 2, !tbaa !5
  %4 = add i16 %3, -1
  store i16 %4, ptr %1, align 2, !tbaa !5
  %5 = icmp ne i16 %4, 0
  br i1 %5, label %6, label %9

6:                                                ; preds = %2
  %7 = load i16, ptr %1, align 2, !tbaa !5
  %8 = load i16, ptr %1, align 2, !tbaa !5
  call void @SYS_setBank(i16 noundef zeroext %7, i16 noundef zeroext %8)
  br label %2, !llvm.loop !9

9:                                                ; preds = %2
  store i8 0, ptr @region, align 1, !tbaa !11
  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: nounwind uwtable
declare dso_local void @SYS_setBank(i16 noundef zeroext, i16 noundef zeroext) #0

; 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!7, !7, i64 0}


; 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"

@region = external hidden local_unnamed_addr global i8, align 1

; Function Attrs: nounwind uwtable
define dso_local void @SYS_resetBanks() local_unnamed_addr #0 {
  tail call void @SYS_setBank(i16 noundef zeroext 7, i16 noundef zeroext 7)
  tail call void @SYS_setBank(i16 noundef zeroext 6, i16 noundef zeroext 6)
  tail call void @SYS_setBank(i16 noundef zeroext 5, i16 noundef zeroext 5)
  tail call void @SYS_setBank(i16 noundef zeroext 4, i16 noundef zeroext 4)
  tail call void @SYS_setBank(i16 noundef zeroext 3, i16 noundef zeroext 3)
  tail call void @SYS_setBank(i16 noundef zeroext 2, i16 noundef zeroext 2)
  tail call void @SYS_setBank(i16 noundef zeroext 1, i16 noundef zeroext 1)
  store i8 0, ptr @region, align 1, !tbaa !5
  ret void
}

; Function Attrs: nounwind uwtable
declare dso_local void @SYS_setBank(i16 noundef zeroext, i16 noundef zeroext) local_unnamed_addr #0

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" }

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


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,SROAPass,TailCallElimPass