; LLVM IR from BrunoLevy/learn-fpga :: FemtoRV/FIRMWARE/LIBFEMTOGL (tty_init)

; 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 @femtosoc_tty_init() #0 {
  %1 = load volatile i32, ptr inttoptr (i64 5242880 to ptr), align 4, !tbaa !5
  %2 = and i32 %1, 8
  %3 = icmp ne i32 %2, 0
  br i1 %3, label %4, label %5

4:                                                ; preds = %0
  call void @GL_tty_init(i32 noundef -1)
  br label %11

5:                                                ; preds = %0
  %6 = load volatile i32, ptr inttoptr (i64 5242880 to ptr), align 4, !tbaa !5
  %7 = and i32 %6, 128
  %8 = icmp ne i32 %7, 0
  br i1 %8, label %9, label %10

9:                                                ; preds = %5
  call void (...) @MAX7219_tty_init()
  br label %10

10:                                               ; preds = %9, %5
  br label %11

11:                                               ; preds = %10, %4
  ret void
}

declare void @GL_tty_init(i32 noundef) #1

declare void @MAX7219_tty_init(...) #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 = { "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"}


; 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: nounwind uwtable
define dso_local void @femtosoc_tty_init() local_unnamed_addr #0 {
  %1 = load volatile i32, ptr inttoptr (i64 5242880 to ptr), align 1048576, !tbaa !5
  %2 = and i32 %1, 8
  %.not = icmp eq i32 %2, 0
  br i1 %.not, label %4, label %3

3:                                                ; preds = %0
  tail call void @GL_tty_init(i32 noundef -1) #2
  br label %8

4:                                                ; preds = %0
  %5 = load volatile i32, ptr inttoptr (i64 5242880 to ptr), align 1048576, !tbaa !5
  %6 = and i32 %5, 128
  %.not1 = icmp eq i32 %6, 0
  br i1 %.not1, label %8, label %7

7:                                                ; preds = %4
  tail call void (...) @MAX7219_tty_init() #2
  br label %8

8:                                                ; preds = %4, %7, %3
  ret void
}

declare void @GL_tty_init(i32 noundef) local_unnamed_addr #1

declare void @MAX7219_tty_init(...) local_unnamed_addr #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 = { "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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: GlobalOptPass,InferAlignmentPass,InstCombinePass,SimplifyCFGPass,TailCallElimPass