; LLVM IR from danginsburg/opengles3-book :: Chapter_8/Simple_VertexShader (Simple_VertexShader)

; 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"

%struct.ESContext = type { ptr, ptr, i32, i32, ptr, i64, ptr, ptr, ptr, ptr, ptr, ptr, ptr }
%struct.UserData = type { i32, i32, ptr, ptr, i32, float, %struct.ESMatrix }
%struct.ESMatrix = type { [4 x [4 x float]] }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nounwind uwtable
define dso_local void @Shutdown(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  %4 = load ptr, ptr %2, align 8, !tbaa !5
  %5 = getelementptr inbounds %struct.ESContext, ptr %4, i32 0, i32 1
  %6 = load ptr, ptr %5, align 8, !tbaa !9
  store ptr %6, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = getelementptr inbounds %struct.UserData, ptr %7, i32 0, i32 2
  %9 = load ptr, ptr %8, align 8, !tbaa !13
  %10 = icmp ne ptr %9, null
  br i1 %10, label %11, label %15

11:                                               ; preds = %1
  %12 = load ptr, ptr %3, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.UserData, ptr %12, i32 0, i32 2
  %14 = load ptr, ptr %13, align 8, !tbaa !13
  call void @free(ptr noundef %14) #4
  br label %15

15:                                               ; preds = %11, %1
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.UserData, ptr %16, i32 0, i32 3
  %18 = load ptr, ptr %17, align 8, !tbaa !17
  %19 = icmp ne ptr %18, null
  br i1 %19, label %20, label %24

20:                                               ; preds = %15
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.UserData, ptr %21, i32 0, i32 3
  %23 = load ptr, ptr %22, align 8, !tbaa !17
  call void @free(ptr noundef %23) #4
  br label %24

24:                                               ; preds = %20, %15
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = getelementptr inbounds %struct.UserData, ptr %25, i32 0, i32 0
  %27 = load i32, ptr %26, align 8, !tbaa !18
  call void @glDeleteProgram(i32 noundef %27)
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret void
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

declare void @glDeleteProgram(i32 noundef) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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 #3 = { "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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !6, i64 8}
!10 = !{!"ESContext", !6, i64 0, !6, i64 8, !11, i64 16, !11, i64 20, !6, i64 24, !12, i64 32, !6, i64 40, !6, i64 48, !6, i64 56, !6, i64 64, !6, i64 72, !6, i64 80, !6, i64 88}
!11 = !{!"int", !7, i64 0}
!12 = !{!"long", !7, i64 0}
!13 = !{!14, !6, i64 8}
!14 = !{!"", !11, i64 0, !11, i64 4, !6, i64 8, !6, i64 16, !11, i64 24, !15, i64 28, !16, i64 32}
!15 = !{!"float", !7, i64 0}
!16 = !{!"", !7, i64 0}
!17 = !{!14, !6, i64 16}
!18 = !{!14, !11, 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: nounwind uwtable
define dso_local void @Shutdown(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %4 = getelementptr inbounds i8, ptr %3, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !12
  %.not = icmp eq ptr %5, null
  br i1 %.not, label %7, label %6

6:                                                ; preds = %1
  tail call void @free(ptr noundef nonnull %5) #3
  br label %7

7:                                                ; preds = %6, %1
  %8 = getelementptr inbounds i8, ptr %3, i64 16
  %9 = load ptr, ptr %8, align 8, !tbaa !16
  %.not7 = icmp eq ptr %9, null
  br i1 %.not7, label %11, label %10

10:                                               ; preds = %7
  tail call void @free(ptr noundef nonnull %9) #3
  br label %11

11:                                               ; preds = %10, %7
  %12 = load i32, ptr %3, align 8, !tbaa !17
  tail call void @glDeleteProgram(i32 noundef %12) #3
  ret void
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #1

declare void @glDeleteProgram(i32 noundef) local_unnamed_addr #2

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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 }

!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, !7, i64 8}
!6 = !{!"ESContext", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 20, !7, i64 24, !11, i64 32, !7, i64 40, !7, i64 48, !7, i64 56, !7, i64 64, !7, i64 72, !7, i64 80, !7, i64 88}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"long", !8, i64 0}
!12 = !{!13, !7, i64 8}
!13 = !{!"", !10, i64 0, !10, i64 4, !7, i64 8, !7, i64 16, !10, i64 24, !14, i64 28, !15, i64 32}
!14 = !{!"float", !8, i64 0}
!15 = !{!"", !8, i64 0}
!16 = !{!13, !7, i64 16}
!17 = !{!13, !10, i64 0}


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