; LLVM IR from paroj/gltut :: glsdk/glload/source/gl_load_cpp.ll (ZN6glload13LoadFunctionsEv)

; 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"

%"class.glload::LoadTest" = type { i8, i32 }

; Function Attrs: mustprogress uwtable
define dso_local i64 @_ZN6glload13LoadFunctionsEv() #0 {
  %1 = alloca %"class.glload::LoadTest", align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  %4 = call i32 @ogl_LoadFunctions()
  store i32 %4, ptr %2, align 4, !tbaa !5
  %5 = load i32, ptr %2, align 4, !tbaa !5
  %6 = icmp eq i32 %5, 0
  br i1 %6, label %7, label %8

7:                                                ; preds = %0
  call void @_ZN6glload8LoadTestC2Ebi(ptr noundef nonnull align 4 dereferenceable(8) %1, i1 noundef zeroext false, i32 noundef 0)
  store i32 1, ptr %3, align 4
  br label %11

8:                                                ; preds = %0
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = sub nsw i32 %9, 1
  call void @_ZN6glload8LoadTestC2Ebi(ptr noundef nonnull align 4 dereferenceable(8) %1, i1 noundef zeroext true, i32 noundef %10)
  store i32 1, ptr %3, align 4
  br label %11

11:                                               ; preds = %8, %7
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  %12 = load i64, ptr %1, align 4
  ret i64 %12
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

declare i32 @ogl_LoadFunctions() #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6glload8LoadTestC2Ebi(ptr noundef nonnull align 4 dereferenceable(8), i1 noundef zeroext, i32 noundef) unnamed_addr #3 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { mustprogress 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 #4 = { 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++ TBAA"}


; 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"

%"class.glload::LoadTest" = type { i8, i32 }

; Function Attrs: mustprogress uwtable
define dso_local i64 @_ZN6glload13LoadFunctionsEv() local_unnamed_addr #0 {
  %1 = alloca %"class.glload::LoadTest", align 8
  %2 = tail call i32 @ogl_LoadFunctions()
  %3 = icmp eq i32 %2, 0
  br i1 %3, label %4, label %5

4:                                                ; preds = %0
  call void @_ZN6glload8LoadTestC2Ebi(ptr noundef nonnull align 4 dereferenceable(8) %1, i1 noundef zeroext false, i32 noundef 0)
  br label %7

5:                                                ; preds = %0
  %6 = add nsw i32 %2, -1
  call void @_ZN6glload8LoadTestC2Ebi(ptr noundef nonnull align 4 dereferenceable(8) %1, i1 noundef zeroext true, i32 noundef %6)
  br label %7

7:                                                ; preds = %5, %4
  %8 = load i64, ptr %1, align 8
  ret i64 %8
}

declare i32 @ogl_LoadFunctions() local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN6glload8LoadTestC2Ebi(ptr noundef nonnull align 4 dereferenceable(8), i1 noundef zeroext, i32 noundef) unnamed_addr #2 align 2

attributes #0 = { 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 #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 = { mustprogress 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)"}


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