; LLVM IR from sca-secure-library-sca25519/sca25519 :: libopencm3/lib/usb (usb_lm4f)

; 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 @usb_enable_interrupts(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = load volatile i8, ptr inttoptr (i64 1074069515 to ptr), align 1, !tbaa !9
  %9 = zext i8 %8 to i32
  %10 = or i32 %9, %7
  %11 = trunc i32 %10 to i8
  store volatile i8 %11, ptr inttoptr (i64 1074069515 to ptr), align 1, !tbaa !9
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = load volatile i16, ptr inttoptr (i64 1074069512 to ptr), align 2, !tbaa !10
  %14 = zext i16 %13 to i32
  %15 = or i32 %14, %12
  %16 = trunc i32 %15 to i16
  store volatile i16 %16, ptr inttoptr (i64 1074069512 to ptr), align 2, !tbaa !10
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = load volatile i16, ptr inttoptr (i64 1074069510 to ptr), align 2, !tbaa !10
  %19 = zext i16 %18 to i32
  %20 = or i32 %19, %17
  %21 = trunc i32 %20 to i16
  store volatile i16 %21, ptr inttoptr (i64 1074069510 to ptr), align 2, !tbaa !10
  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 = !{!7, !7, i64 0}
!10 = !{!11, !11, i64 0}
!11 = !{!"short", !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: nofree norecurse nounwind uwtable
define dso_local void @usb_enable_interrupts(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = load volatile i8, ptr inttoptr (i64 1074069515 to ptr), align 1, !tbaa !5
  %5 = trunc i32 %0 to i8
  %6 = or i8 %4, %5
  store volatile i8 %6, ptr inttoptr (i64 1074069515 to ptr), align 1, !tbaa !5
  %7 = load volatile i16, ptr inttoptr (i64 1074069512 to ptr), align 8, !tbaa !8
  %8 = trunc i32 %1 to i16
  %9 = or i16 %7, %8
  store volatile i16 %9, ptr inttoptr (i64 1074069512 to ptr), align 8, !tbaa !8
  %10 = load volatile i16, ptr inttoptr (i64 1074069510 to ptr), align 2, !tbaa !8
  %11 = trunc i32 %2 to i16
  %12 = or i16 %10, %11
  store volatile i16 %12, ptr inttoptr (i64 1074069510 to ptr), align 2, !tbaa !8
  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"}
!8 = !{!9, !9, i64 0}
!9 = !{!"short", !6, i64 0}


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