; LLVM IR from lfarcaro/ARINC653_ARMV7A_AM335X :: ARINC653_PORT (console)

; 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 zeroext i8 @CONSOLE_READ_BYTE(ptr noundef %0) #0 {
  %2 = alloca i8, align 1
  %3 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  %4 = load volatile i32, ptr inttoptr (i64 1155567636 to ptr), align 4, !tbaa !9
  %5 = and i32 %4, 1
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %7, label %8

7:                                                ; preds = %1
  store i8 0, ptr %2, align 1
  br label %12

8:                                                ; preds = %1
  %9 = load volatile i32, ptr inttoptr (i64 1155567616 to ptr), align 4, !tbaa !9
  %10 = trunc i32 %9 to i8
  %11 = load ptr, ptr %3, align 8, !tbaa !5
  store i8 %10, ptr %11, align 1, !tbaa !11
  store i8 1, ptr %2, align 1
  br label %12

12:                                               ; preds = %8, %7
  %13 = load i8, ptr %2, align 1
  ret i8 %13
}

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 = !{!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"

; Function Attrs: mustprogress nofree norecurse nounwind willreturn uwtable
define dso_local zeroext range(i8 0, 2) i8 @CONSOLE_READ_BYTE(ptr nocapture noundef writeonly %0) local_unnamed_addr #0 {
  %2 = load volatile i32, ptr inttoptr (i64 1155567636 to ptr), align 4, !tbaa !5
  %3 = and i32 %2, 1
  %4 = icmp eq i32 %3, 0
  br i1 %4, label %8, label %5

5:                                                ; preds = %1
  %6 = load volatile i32, ptr inttoptr (i64 1155567616 to ptr), align 4096, !tbaa !5
  %7 = trunc i32 %6 to i8
  store i8 %7, ptr %0, align 1, !tbaa !9
  br label %8

8:                                                ; preds = %1, %5
  %.0 = phi i8 [ 1, %5 ], [ 0, %1 ]
  ret i8 %.0
}

attributes #0 = { mustprogress nofree norecurse nounwind willreturn 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/C++ TBAA"}
!9 = !{!7, !7, i64 0}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferAlignmentPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass