; LLVM IR from embeddednirvana/A-Rudimentary-RTOS-for-Satellite-Control :: device (driver_pio)

; 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"

%struct._pio_port = type { i32 }
%struct._AT91S_PIO = type { i32, i32, i32, [1 x i32], i32, i32, i32, [1 x i32], i32, i32, i32, [1 x i32], i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, [1 x i32], i32, i32, i32, [1 x i32], i32, i32, i32, [9 x i32], i32, i32, i32 }

; Function Attrs: nounwind uwtable
define dso_local i32 @pio_output(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load i32, ptr %4, align 4, !tbaa !9
  %6 = icmp ne i32 %5, 0
  br i1 %6, label %7, label %13

7:                                                ; preds = %2
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct._pio_port, ptr %8, i32 0, i32 0
  %10 = load i32, ptr %9, align 4, !tbaa !11
  %11 = load volatile i32, ptr getelementptr inbounds (%struct._AT91S_PIO, ptr inttoptr (i64 4294964736 to ptr), i32 0, i32 14), align 4, !tbaa !13
  %12 = or i32 %11, %10
  store volatile i32 %12, ptr getelementptr inbounds (%struct._AT91S_PIO, ptr inttoptr (i64 4294964736 to ptr), i32 0, i32 14), align 4, !tbaa !13
  br label %20

13:                                               ; preds = %2
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct._pio_port, ptr %14, i32 0, i32 0
  %16 = load i32, ptr %15, align 4, !tbaa !11
  %17 = xor i32 %16, -1
  %18 = load volatile i32, ptr getelementptr inbounds (%struct._AT91S_PIO, ptr inttoptr (i64 4294964736 to ptr), i32 0, i32 14), align 4, !tbaa !13
  %19 = and i32 %18, %17
  store volatile i32 %19, ptr getelementptr inbounds (%struct._AT91S_PIO, ptr inttoptr (i64 4294964736 to ptr), i32 0, i32 14), align 4, !tbaa !13
  br label %20

20:                                               ; preds = %13, %7
  ret i32 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"_pio_port", !10, i64 0}
!13 = !{!14, !10, i64 56}
!14 = !{!"_AT91S_PIO", !10, i64 0, !10, i64 4, !10, i64 8, !7, i64 12, !10, i64 16, !10, i64 20, !10, i64 24, !7, i64 28, !10, i64 32, !10, i64 36, !10, i64 40, !7, i64 44, !10, i64 48, !10, i64 52, !10, i64 56, !10, i64 60, !10, i64 64, !10, i64 68, !10, i64 72, !10, i64 76, !10, i64 80, !10, i64 84, !10, i64 88, !7, i64 92, !10, i64 96, !10, i64 100, !10, i64 104, !7, i64 108, !10, i64 112, !10, i64 116, !10, i64 120, !7, i64 124, !10, i64 160, !10, i64 164, !10, i64 168}


; 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 noundef i32 @pio_output(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %.not = icmp eq i32 %1, 0
  %3 = load i32, ptr %0, align 4, !tbaa !5
  br i1 %.not, label %7, label %4

4:                                                ; preds = %2
  %5 = load volatile i32, ptr inttoptr (i64 4294964792 to ptr), align 8, !tbaa !10
  %6 = or i32 %5, %3
  br label %11

7:                                                ; preds = %2
  %8 = xor i32 %3, -1
  %9 = load volatile i32, ptr inttoptr (i64 4294964792 to ptr), align 8, !tbaa !10
  %10 = and i32 %9, %8
  br label %11

11:                                               ; preds = %7, %4
  %.sink = phi i32 [ %10, %7 ], [ %6, %4 ]
  store volatile i32 %.sink, ptr inttoptr (i64 4294964792 to ptr), align 8, !tbaa !10
  ret i32 0
}

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, !7, i64 0}
!6 = !{!"_pio_port", !7, i64 0}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !7, i64 56}
!11 = !{!"_AT91S_PIO", !7, i64 0, !7, i64 4, !7, i64 8, !8, i64 12, !7, i64 16, !7, i64 20, !7, i64 24, !8, i64 28, !7, i64 32, !7, i64 36, !7, i64 40, !8, i64 44, !7, i64 48, !7, i64 52, !7, i64 56, !7, i64 60, !7, i64 64, !7, i64 68, !7, i64 72, !7, i64 76, !7, i64 80, !7, i64 84, !7, i64 88, !8, i64 92, !7, i64 96, !7, i64 100, !7, i64 104, !8, i64 108, !7, i64 112, !7, i64 116, !7, i64 120, !8, i64 124, !7, i64 160, !7, i64 164, !7, i64 168}


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