; LLVM IR from Stephane-D/SGDK :: src (z80_ctrl)

; 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: nounwind uwtable
define dso_local void @Z80_setBank(i16 noundef zeroext %0) #0 {
  %2 = alloca i16, align 2
  %3 = alloca ptr, align 8
  %4 = alloca i16, align 2
  %5 = alloca i16, align 2
  store i16 %0, ptr %2, align 2, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #2
  call void @llvm.lifetime.start.p0(i64 2, ptr %4) #2
  call void @llvm.lifetime.start.p0(i64 2, ptr %5) #2
  store ptr inttoptr (i64 10510336 to ptr), ptr %3, align 8, !tbaa !9
  store i16 9, ptr %4, align 2, !tbaa !5
  %6 = load i16, ptr %2, align 2, !tbaa !5
  store i16 %6, ptr %5, align 2, !tbaa !5
  br label %7

7:                                                ; preds = %11, %1
  %8 = load i16, ptr %4, align 2, !tbaa !5
  %9 = add i16 %8, -1
  store i16 %9, ptr %4, align 2, !tbaa !5
  %10 = icmp ne i16 %8, 0
  br i1 %10, label %11, label %19

11:                                               ; preds = %7
  %12 = load i16, ptr %5, align 2, !tbaa !5
  %13 = trunc i16 %12 to i8
  %14 = load ptr, ptr %3, align 8, !tbaa !9
  store volatile i8 %13, ptr %14, align 1, !tbaa !11
  %15 = load i16, ptr %5, align 2, !tbaa !5
  %16 = zext i16 %15 to i32
  %17 = ashr i32 %16, 1
  %18 = trunc i32 %17 to i16
  store i16 %18, ptr %5, align 2, !tbaa !5
  br label %7, !llvm.loop !12

19:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 2, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 2, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #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 = !{!7, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"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: nofree norecurse nounwind uwtable
define dso_local void @Z80_setBank(i16 noundef zeroext %0) local_unnamed_addr #0 {
  %2 = trunc i16 %0 to i8
  store volatile i8 %2, ptr inttoptr (i64 10510336 to ptr), align 8192, !tbaa !5
  %3 = lshr i16 %0, 1
  %4 = trunc i16 %3 to i8
  store volatile i8 %4, ptr inttoptr (i64 10510336 to ptr), align 8192, !tbaa !5
  %5 = lshr i16 %0, 2
  %6 = trunc i16 %5 to i8
  store volatile i8 %6, ptr inttoptr (i64 10510336 to ptr), align 8192, !tbaa !5
  %7 = lshr i16 %0, 3
  %8 = trunc i16 %7 to i8
  store volatile i8 %8, ptr inttoptr (i64 10510336 to ptr), align 8192, !tbaa !5
  %9 = lshr i16 %0, 4
  %10 = trunc i16 %9 to i8
  store volatile i8 %10, ptr inttoptr (i64 10510336 to ptr), align 8192, !tbaa !5
  %11 = lshr i16 %0, 5
  %12 = trunc i16 %11 to i8
  store volatile i8 %12, ptr inttoptr (i64 10510336 to ptr), align 8192, !tbaa !5
  %13 = lshr i16 %0, 6
  %14 = trunc i16 %13 to i8
  store volatile i8 %14, ptr inttoptr (i64 10510336 to ptr), align 8192, !tbaa !5
  %15 = lshr i16 %0, 7
  %16 = trunc i16 %15 to i8
  store volatile i8 %16, ptr inttoptr (i64 10510336 to ptr), align 8192, !tbaa !5
  %17 = lshr i16 %0, 8
  %18 = trunc nuw i16 %17 to i8
  store volatile i8 %18, ptr inttoptr (i64 10510336 to ptr), align 8192, !tbaa !5
  ret void
}

attributes #0 = { nofree norecurse 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,IPSCCPPass,IndVarSimplifyPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,LoopRotatePass,PostOrderFunctionAttrsPass,SCCPPass,SROAPass