; LLVM IR from sca-secure-library-sca25519/sca25519 :: libopencm3/lib/swm050 (wdt)

; 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 @wdt_enable(i1 noundef zeroext %0) #0 {
  %2 = alloca i8, align 1
  %3 = zext i1 %0 to i8
  store i8 %3, ptr %2, align 1, !tbaa !5
  %4 = load i8, ptr %2, align 1, !tbaa !5, !range !9, !noundef !10
  %5 = trunc i8 %4 to i1
  br i1 %5, label %6, label %9

6:                                                ; preds = %1
  %7 = load volatile i32, ptr inttoptr (i64 1073844224 to ptr), align 4, !tbaa !11
  %8 = or i32 %7, 1
  store volatile i32 %8, ptr inttoptr (i64 1073844224 to ptr), align 4, !tbaa !11
  br label %12

9:                                                ; preds = %1
  %10 = load volatile i32, ptr inttoptr (i64 1073844224 to ptr), align 4, !tbaa !11
  %11 = and i32 %10, -2
  store volatile i32 %11, ptr inttoptr (i64 1073844224 to ptr), align 4, !tbaa !11
  br label %12

12:                                               ; preds = %9, %6
  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 = !{!"_Bool", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{i8 0, i8 2}
!10 = !{}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !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 @wdt_enable(i1 noundef zeroext %0) local_unnamed_addr #0 {
  %2 = load volatile i32, ptr inttoptr (i64 1073844224 to ptr), align 4096, !tbaa !5
  %3 = and i32 %2, -2
  %masksel = zext i1 %0 to i32
  %.sink = or disjoint i32 %3, %masksel
  store volatile i32 %.sink, ptr inttoptr (i64 1073844224 to ptr), align 4096, !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: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass