; LLVM IR from sca-secure-library-sca25519/sca25519 :: libopencm3/lib/lm4f (rcc)

; 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: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @rcc_set_pll_divisor(i8 noundef zeroext %0) #1 {
  %2 = alloca i8, align 1
  %3 = alloca i32, align 4
  store i8 %0, ptr %2, align 1, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  %4 = load volatile i32, ptr inttoptr (i64 1074782304 to ptr), align 4, !tbaa !8
  %5 = or i32 %4, 4194304
  store volatile i32 %5, ptr inttoptr (i64 1074782304 to ptr), align 4, !tbaa !8
  %6 = load volatile i32, ptr inttoptr (i64 1074782320 to ptr), align 4, !tbaa !8
  store i32 %6, ptr %3, align 4, !tbaa !8
  %7 = load i32, ptr %3, align 4, !tbaa !8
  %8 = and i32 %7, -532676609
  store i32 %8, ptr %3, align 4, !tbaa !8
  %9 = load i8, ptr %2, align 1, !tbaa !5
  %10 = zext i8 %9 to i32
  %11 = sub nsw i32 %10, 1
  %12 = shl i32 %11, 22
  %13 = and i32 %12, 532676608
  %14 = load i32, ptr %3, align 4, !tbaa !8
  %15 = or i32 %14, %13
  store i32 %15, ptr %3, align 4, !tbaa !8
  %16 = load i32, ptr %3, align 4, !tbaa !8
  %17 = or i32 %16, 1073741824
  store i32 %17, ptr %3, align 4, !tbaa !8
  %18 = load i32, ptr %3, align 4, !tbaa !8
  store volatile i32 %18, ptr inttoptr (i64 1074782320 to ptr), align 4, !tbaa !8
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"int", !6, 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 @rcc_set_pll_divisor(i8 noundef zeroext %0) local_unnamed_addr #0 {
  %2 = load volatile i32, ptr inttoptr (i64 1074782304 to ptr), align 32, !tbaa !5
  %3 = or i32 %2, 4194304
  store volatile i32 %3, ptr inttoptr (i64 1074782304 to ptr), align 32, !tbaa !5
  %4 = load volatile i32, ptr inttoptr (i64 1074782320 to ptr), align 16, !tbaa !5
  %5 = and i32 %4, -1606418433
  %6 = zext i8 %0 to i32
  %7 = shl nuw nsw i32 %6, 22
  %8 = add nuw nsw i32 %7, 532676608
  %9 = and i32 %8, 532676608
  %10 = or disjoint i32 %9, %5
  %11 = or disjoint i32 %10, 1073741824
  store volatile i32 %11, ptr inttoptr (i64 1074782320 to ptr), align 16, !tbaa !5
  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"}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass