; LLVM IR from aws/s2n-tls :: tests/cbmc/stubs (s2n_libcrypto_is_awslc)

; 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"

@flag = external hidden global i32, align 4
@s2n_awslc_flag = external hidden global i8, align 1

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @s2n_libcrypto_is_awslc() #0 {
  %1 = load i32, ptr @flag, align 4, !tbaa !5
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %3, label %9

3:                                                ; preds = %0
  %4 = call zeroext i1 (...) @nondet_bool()
  %5 = zext i1 %4 to i64
  %6 = select i1 %4, i32 1, i32 0
  %7 = icmp ne i32 %6, 0
  %8 = zext i1 %7 to i8
  store i8 %8, ptr @s2n_awslc_flag, align 1, !tbaa !9
  store i32 1, ptr @flag, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %3, %0
  %10 = load i8, ptr @s2n_awslc_flag, align 1, !tbaa !9, !range !11, !noundef !12
  %11 = trunc i8 %10 to i1
  ret i1 %11
}

declare zeroext i1 @nondet_bool(...) #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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"_Bool", !7, i64 0}
!11 = !{i8 0, i8 2}
!12 = !{}


; 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"

@flag = external hidden local_unnamed_addr global i32, align 4
@s2n_awslc_flag = external hidden local_unnamed_addr global i8, align 1

; Function Attrs: nounwind uwtable
define dso_local zeroext i1 @s2n_libcrypto_is_awslc() local_unnamed_addr #0 {
  %1 = load i32, ptr @flag, align 4, !tbaa !5
  %2 = icmp eq i32 %1, 0
  br i1 %2, label %4, label %._crit_edge

._crit_edge:                                      ; preds = %0
  %.pre = load i8, ptr @s2n_awslc_flag, align 1, !tbaa !9, !range !11
  %3 = trunc nuw i8 %.pre to i1
  br label %7

4:                                                ; preds = %0
  %5 = tail call zeroext i1 (...) @nondet_bool() #2
  %6 = zext i1 %5 to i8
  store i8 %6, ptr @s2n_awslc_flag, align 1, !tbaa !9
  store i32 1, ptr @flag, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %._crit_edge, %4
  %8 = phi i1 [ %3, %._crit_edge ], [ %5, %4 ]
  ret i1 %8
}

declare zeroext i1 @nondet_bool(...) 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"}
!9 = !{!10, !10, i64 0}
!10 = !{!"_Bool", !7, i64 0}
!11 = !{i8 0, i8 2}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InstCombinePass,TailCallElimPass