; LLVM IR from steps3d/graphics-book :: Code/Core/Texture.ll (ZN7Texture8initMipsEv)

; 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.Texture = type { i32, i32, i32, i32, i32, i8, i32, %"class.std::__cxx11::basic_string" }
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

@__glewGenerateMipmap = external global ptr, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7Texture8initMipsEv(ptr noundef nonnull align 8 dereferenceable(64) %0) #0 align 2 {
  %2 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  %3 = load ptr, ptr %2, align 8
  %4 = getelementptr inbounds %class.Texture, ptr %3, i32 0, i32 5
  %5 = load i8, ptr %4, align 4, !tbaa !9, !range !16, !noundef !17
  %6 = trunc i8 %5 to i1
  br i1 %6, label %7, label %11

7:                                                ; preds = %1
  %8 = load ptr, ptr @__glewGenerateMipmap, align 8, !tbaa !5
  %9 = getelementptr inbounds %class.Texture, ptr %3, i32 0, i32 1
  %10 = load i32, ptr %9, align 4, !tbaa !18
  call void %8(i32 noundef %10)
  br label %11

11:                                               ; preds = %7, %1
  %12 = getelementptr inbounds %class.Texture, ptr %3, i32 0, i32 5
  %13 = load i8, ptr %12, align 4, !tbaa !9, !range !16, !noundef !17
  %14 = trunc i8 %13 to i1
  br i1 %14, label %15, label %20

15:                                               ; preds = %11
  %16 = getelementptr inbounds %class.Texture, ptr %3, i32 0, i32 1
  %17 = load i32, ptr %16, align 4, !tbaa !18
  call void @glTexParameteri(i32 noundef %17, i32 noundef 10241, i32 noundef 9987)
  %18 = getelementptr inbounds %class.Texture, ptr %3, i32 0, i32 1
  %19 = load i32, ptr %18, align 4, !tbaa !18
  call void @glTexParameteri(i32 noundef %19, i32 noundef 10240, i32 noundef 9729)
  br label %25

20:                                               ; preds = %11
  %21 = getelementptr inbounds %class.Texture, ptr %3, i32 0, i32 1
  %22 = load i32, ptr %21, align 4, !tbaa !18
  call void @glTexParameteri(i32 noundef %22, i32 noundef 10241, i32 noundef 9729)
  %23 = getelementptr inbounds %class.Texture, ptr %3, i32 0, i32 1
  %24 = load i32, ptr %23, align 4, !tbaa !18
  call void @glTexParameteri(i32 noundef %24, i32 noundef 10240, i32 noundef 9729)
  br label %25

25:                                               ; preds = %20, %15
  ret void
}

declare void @glTexParameteri(i32 noundef, i32 noundef, i32 noundef) #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 = { "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, !12, i64 20}
!10 = !{!"_ZTS7Texture", !11, i64 0, !11, i64 4, !11, i64 8, !11, i64 12, !11, i64 16, !12, i64 20, !11, i64 24, !13, i64 32}
!11 = !{!"int", !7, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !14, i64 0, !15, i64 8, !7, i64 16}
!14 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !6, i64 0}
!15 = !{!"long", !7, i64 0}
!16 = !{i8 0, i8 2}
!17 = !{}
!18 = !{!10, !11, i64 4}


; 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"

@__glewGenerateMipmap = external local_unnamed_addr global ptr, align 8

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN7Texture8initMipsEv(ptr nocapture noundef nonnull readonly align 8 dereferenceable(64) %0) local_unnamed_addr #0 align 2 {
  %2 = getelementptr inbounds i8, ptr %0, i64 20
  %3 = load i8, ptr %2, align 4, !tbaa !5, !range !15, !noundef !16
  %4 = trunc nuw i8 %3 to i1
  br i1 %4, label %5, label %9

5:                                                ; preds = %1
  %6 = load ptr, ptr @__glewGenerateMipmap, align 8, !tbaa !17
  %7 = getelementptr inbounds i8, ptr %0, i64 4
  %8 = load i32, ptr %7, align 4, !tbaa !18
  tail call void %6(i32 noundef %8)
  %.pre = load i8, ptr %2, align 4, !tbaa !5, !range !15
  br label %9

9:                                                ; preds = %5, %1
  %10 = phi i8 [ %.pre, %5 ], [ %3, %1 ]
  %11 = trunc nuw i8 %10 to i1
  %12 = getelementptr inbounds i8, ptr %0, i64 4
  %13 = load i32, ptr %12, align 4, !tbaa !18
  %. = select i1 %11, i32 9987, i32 9729
  tail call void @glTexParameteri(i32 noundef %13, i32 noundef 10241, i32 noundef %.)
  %14 = load i32, ptr %12, align 4, !tbaa !18
  tail call void @glTexParameteri(i32 noundef %14, i32 noundef 10240, i32 noundef 9729)
  ret void
}

declare void @glTexParameteri(i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #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 = { "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, !10, i64 20}
!6 = !{!"_ZTS7Texture", !7, i64 0, !7, i64 4, !7, i64 8, !7, i64 12, !7, i64 16, !10, i64 20, !7, i64 24, !11, i64 32}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"bool", !8, i64 0}
!11 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !12, i64 0, !14, i64 8, !8, i64 16}
!12 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !13, i64 0}
!13 = !{!"any pointer", !8, i64 0}
!14 = !{!"long", !8, i64 0}
!15 = !{i8 0, i8 2}
!16 = !{}
!17 = !{!13, !13, i64 0}
!18 = !{!6, !7, i64 4}


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