; LLVM IR from WayneLin92/SSeqCpp :: thirdparty/fmt/test/posix-mock-test.ll (ZN4test4readEiPvm)

; 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"

@_ZN12_GLOBAL__N_110read_nbyteE = external hidden global i64, align 8
@_ZN12_GLOBAL__N_110read_countE = external hidden global i32, align 4

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__errno_location() #0

; Function Attrs: mustprogress uwtable
define dso_local noundef i64 @_ZN4test4readEiPvm(i32 noundef %0, ptr noundef %1, i64 noundef %2) #1 {
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  store i32 %0, ptr %5, align 4, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !9
  store i64 %2, ptr %7, align 8, !tbaa !11
  %8 = load i64, ptr %7, align 8, !tbaa !11
  store i64 %8, ptr @_ZN12_GLOBAL__N_110read_nbyteE, align 8, !tbaa !11
  %9 = load i32, ptr @_ZN12_GLOBAL__N_110read_countE, align 4, !tbaa !5
  %10 = icmp ne i32 %9, 0
  br i1 %10, label %11, label %18

11:                                               ; preds = %3
  %12 = load i32, ptr @_ZN12_GLOBAL__N_110read_countE, align 4, !tbaa !5
  %13 = add nsw i32 %12, 1
  store i32 %13, ptr @_ZN12_GLOBAL__N_110read_countE, align 4, !tbaa !5
  %14 = icmp ne i32 %12, 3
  br i1 %14, label %15, label %17

15:                                               ; preds = %11
  %16 = call ptr @__errno_location() #3
  store i32 4, ptr %16, align 4, !tbaa !5
  store i64 -1, ptr %4, align 8
  br label %23

17:                                               ; preds = %11
  br label %18

18:                                               ; preds = %17, %3
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = load ptr, ptr %6, align 8, !tbaa !9
  %21 = load i64, ptr %7, align 8, !tbaa !11
  %22 = call i64 @read(i32 noundef %19, ptr noundef %20, i64 noundef %21)
  store i64 %22, ptr %4, align 8
  br label %23

23:                                               ; preds = %18, %15
  %24 = load i64, ptr %4, align 8
  ret i64 %24
}

declare i64 @read(i32 noundef, ptr noundef, i64 noundef) #2

attributes #0 = { nounwind willreturn memory(none) "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 = { mustprogress 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 = { "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 #3 = { nounwind willreturn memory(none) }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"long", !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"

@_ZN12_GLOBAL__N_110read_nbyteE = external hidden local_unnamed_addr global i64, align 8
@_ZN12_GLOBAL__N_110read_countE = external hidden local_unnamed_addr global i32, align 4

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__errno_location() local_unnamed_addr #0

; Function Attrs: mustprogress nofree uwtable
define dso_local noundef i64 @_ZN4test4readEiPvm(i32 noundef %0, ptr nocapture noundef %1, i64 noundef %2) local_unnamed_addr #1 {
  store i64 %2, ptr @_ZN12_GLOBAL__N_110read_nbyteE, align 8, !tbaa !5
  %4 = load i32, ptr @_ZN12_GLOBAL__N_110read_countE, align 4, !tbaa !9
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %9, label %5

5:                                                ; preds = %3
  %6 = add nsw i32 %4, 1
  store i32 %6, ptr @_ZN12_GLOBAL__N_110read_countE, align 4, !tbaa !9
  %.not5 = icmp eq i32 %4, 3
  br i1 %.not5, label %9, label %7

7:                                                ; preds = %5
  %8 = tail call ptr @__errno_location() #3
  store i32 4, ptr %8, align 4, !tbaa !9
  br label %11

9:                                                ; preds = %5, %3
  %10 = tail call i64 @read(i32 noundef %0, ptr noundef %1, i64 noundef %2)
  br label %11

11:                                               ; preds = %9, %7
  %.0 = phi i64 [ -1, %7 ], [ %10, %9 ]
  ret i64 %.0
}

; Function Attrs: nofree
declare noundef i64 @read(i32 noundef, ptr nocapture noundef, i64 noundef) local_unnamed_addr #2

attributes #0 = { mustprogress nofree nosync nounwind willreturn memory(none) "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 = { mustprogress nofree 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 = { nofree "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 #3 = { nounwind willreturn memory(none) }

!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 = !{!"long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass