; LLVM IR from GPUOpen-LibrariesAndSDKs/TAN :: tan/common/FileUtility.ll (Z7fopen_sPP8_IO_FILEPKcS3_)

; 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"

declare noalias ptr @fopen(ptr noundef, ptr noundef) #0

; Function Attrs: mustprogress uwtable
define dso_local noundef signext i8 @_Z7fopen_sPP8_IO_FILEPKcS3_(ptr noundef %0, ptr noundef %1, ptr noundef %2) #1 {
  %4 = alloca i8, align 1
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca ptr, align 8
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store ptr %2, ptr %7, align 8, !tbaa !5
  %8 = load ptr, ptr %5, align 8, !tbaa !5
  %9 = icmp eq ptr null, %8
  br i1 %9, label %10, label %11

10:                                               ; preds = %3
  store i8 22, ptr %4, align 1
  br label %24

11:                                               ; preds = %3
  %12 = load ptr, ptr %6, align 8, !tbaa !5
  %13 = load ptr, ptr %7, align 8, !tbaa !5
  %14 = call noalias ptr @fopen(ptr noundef %12, ptr noundef %13)
  %15 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %14, ptr %15, align 8, !tbaa !5
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = load ptr, ptr %16, align 8, !tbaa !5
  %18 = icmp ne ptr null, %17
  br i1 %18, label %19, label %20

19:                                               ; preds = %11
  store i8 0, ptr %4, align 1
  br label %24

20:                                               ; preds = %11
  %21 = call ptr @__errno_location() #3
  %22 = load i32, ptr %21, align 4, !tbaa !9
  %23 = trunc i32 %22 to i8
  store i8 %23, ptr %4, align 1
  br label %24

24:                                               ; preds = %20, %19, %10
  %25 = load i8, ptr %4, align 1
  ret i8 %25
}

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__errno_location() #2

attributes #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 = { 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 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"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 nounwind
declare noalias noundef ptr @fopen(ptr nocapture noundef readonly, ptr nocapture noundef readonly) local_unnamed_addr #0

; Function Attrs: mustprogress nofree nounwind uwtable
define dso_local noundef signext i8 @_Z7fopen_sPP8_IO_FILEPKcS3_(ptr noundef writeonly %0, ptr nocapture noundef readonly %1, ptr nocapture noundef readonly %2) local_unnamed_addr #1 {
  %4 = icmp eq ptr %0, null
  br i1 %4, label %11, label %5

5:                                                ; preds = %3
  %6 = tail call noalias ptr @fopen(ptr noundef %1, ptr noundef %2)
  store ptr %6, ptr %0, align 8, !tbaa !5
  %.not = icmp eq ptr %6, null
  br i1 %.not, label %7, label %11

7:                                                ; preds = %5
  %8 = tail call ptr @__errno_location() #3
  %9 = load i32, ptr %8, align 4, !tbaa !9
  %10 = trunc i32 %9 to i8
  br label %11

11:                                               ; preds = %5, %3, %7
  %.0 = phi i8 [ %10, %7 ], [ 22, %3 ], [ 0, %5 ]
  ret i8 %.0
}

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__errno_location() local_unnamed_addr #2

attributes #0 = { nofree nounwind "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 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 = { 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 #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 = !{!"any pointer", !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