; LLVM IR from paroj/gltut :: Tut 17 Spotlight on Textures/CubePointLight.ll (Z14CreateSamplersv)

; 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"

@g_samplers = external dso_local global [1 x i32], align 4
@_funcptr_glGenSamplers = external global ptr, align 8
@_funcptr_glSamplerParameteri = external global ptr, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z14CreateSamplersv() #0 {
  %1 = alloca i32, align 4
  %2 = load ptr, ptr @_funcptr_glGenSamplers, align 8, !tbaa !5
  call void %2(i32 noundef 1, ptr noundef @g_samplers)
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #2
  store i32 0, ptr %1, align 4, !tbaa !9
  br label %3

3:                                                ; preds = %18, %0
  %4 = load i32, ptr %1, align 4, !tbaa !9
  %5 = icmp slt i32 %4, 1
  br i1 %5, label %7, label %6

6:                                                ; preds = %3
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #2
  br label %21

7:                                                ; preds = %3
  %8 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %9 = load i32, ptr %1, align 4, !tbaa !9
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [1 x i32], ptr @g_samplers, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !9
  call void %8(i32 noundef %12, i32 noundef 10240, i32 noundef 9729)
  %13 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %14 = load i32, ptr %1, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [1 x i32], ptr @g_samplers, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !9
  call void %13(i32 noundef %17, i32 noundef 10241, i32 noundef 9729)
  br label %18

18:                                               ; preds = %7
  %19 = load i32, ptr %1, align 4, !tbaa !9
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr %1, align 4, !tbaa !9
  br label %3, !llvm.loop !11

21:                                               ; preds = %6
  %22 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %23 = load i32, ptr @g_samplers, align 4, !tbaa !9
  call void %22(i32 noundef %23, i32 noundef 10242, i32 noundef 33071)
  %24 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %25 = load i32, ptr @g_samplers, align 4, !tbaa !9
  call void %24(i32 noundef %25, i32 noundef 10243, i32 noundef 33071)
  %26 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %27 = load i32, ptr @g_samplers, align 4, !tbaa !9
  call void %26(i32 noundef %27, i32 noundef 32882, i32 noundef 33071)
  ret void
}

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

; 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 = { 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 = !{!"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}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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"

@g_samplers = external dso_local global [1 x i32], align 4
@_funcptr_glGenSamplers = external local_unnamed_addr global ptr, align 8
@_funcptr_glSamplerParameteri = external local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_Z14CreateSamplersv() local_unnamed_addr #0 {
.critedge:
  %0 = load ptr, ptr @_funcptr_glGenSamplers, align 8, !tbaa !5
  tail call void %0(i32 noundef 1, ptr noundef nonnull @g_samplers)
  %1 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %2 = load i32, ptr @g_samplers, align 4, !tbaa !9
  tail call void %1(i32 noundef %2, i32 noundef 10240, i32 noundef 9729)
  %3 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %4 = load i32, ptr @g_samplers, align 4, !tbaa !9
  tail call void %3(i32 noundef %4, i32 noundef 10241, i32 noundef 9729)
  %5 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %6 = load i32, ptr @g_samplers, align 4, !tbaa !9
  tail call void %5(i32 noundef %6, i32 noundef 10242, i32 noundef 33071)
  %7 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %8 = load i32, ptr @g_samplers, align 4, !tbaa !9
  tail call void %7(i32 noundef %8, i32 noundef 10243, i32 noundef 33071)
  %9 = load ptr, ptr @_funcptr_glSamplerParameteri, align 8, !tbaa !5
  %10 = load i32, ptr @g_samplers, align 4, !tbaa !9
  tail call void %9(i32 noundef %10, i32 noundef 32882, i32 noundef 33071)
  ret void
}

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" }

!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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass