; LLVM IR from lfarcaro/ARINC653_ARMV7A_AM335X :: Hardware (uart_bb)

; 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 @UART1ModuleClkConfig() #0 {
  %1 = load volatile i32, ptr inttoptr (i64 1155530860 to ptr), align 4, !tbaa !5
  %2 = or i32 %1, 2
  store volatile i32 %2, ptr inttoptr (i64 1155530860 to ptr), align 4, !tbaa !5
  br label %3

3:                                                ; preds = %7, %0
  %4 = load volatile i32, ptr inttoptr (i64 1155530860 to ptr), align 4, !tbaa !5
  %5 = and i32 %4, 3
  %6 = icmp ne i32 %5, 2
  br i1 %6, label %7, label %8

7:                                                ; preds = %3
  br label %3, !llvm.loop !9

8:                                                ; preds = %3
  br label %9

9:                                                ; preds = %14, %8
  %10 = load volatile i32, ptr inttoptr (i64 1155530752 to ptr), align 4, !tbaa !5
  %11 = and i32 %10, 1280
  %12 = icmp ne i32 %11, 0
  %13 = xor i1 %12, true
  br i1 %13, label %14, label %15

14:                                               ; preds = %9
  br label %9, !llvm.loop !11

15:                                               ; preds = %9
  ret void
}

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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; 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 @UART1ModuleClkConfig() local_unnamed_addr #0 {
  %1 = load volatile i32, ptr inttoptr (i64 1155530860 to ptr), align 4, !tbaa !5
  %2 = or i32 %1, 2
  store volatile i32 %2, ptr inttoptr (i64 1155530860 to ptr), align 4, !tbaa !5
  br label %3

3:                                                ; preds = %3, %0
  %4 = load volatile i32, ptr inttoptr (i64 1155530860 to ptr), align 4, !tbaa !5
  %5 = and i32 %4, 3
  %.not = icmp eq i32 %5, 2
  br i1 %.not, label %.preheader, label %3, !llvm.loop !9

.preheader:                                       ; preds = %3, %.preheader
  %6 = load volatile i32, ptr inttoptr (i64 1155530752 to ptr), align 2097152, !tbaa !5
  %7 = and i32 %6, 1280
  %.not1 = icmp eq i32 %7, 0
  br i1 %.not1, label %.preheader, label %8, !llvm.loop !11

8:                                                ; preds = %.preheader
  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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: GlobalOptPass,InferAlignmentPass,InstCombinePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SimplifyCFGPass