; LLVM IR from TheNachoBIT/GeoFenix-Engine :: Libraries/SOIL2/include (wfETC)

; 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._wfETC1_Block = type { i32, i32 }

; Function Attrs: nounwind uwtable
define dso_local i32 @wfETC1_ReadPixel(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %5 = load ptr, ptr %3, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct._wfETC1_Block, ptr %5, i32 0, i32 1
  %7 = load i32, ptr %6, align 4, !tbaa !11
  %8 = load i32, ptr %4, align 4, !tbaa !9
  %9 = sub i32 32, %8
  %10 = load i32, ptr %4, align 4, !tbaa !9
  %11 = urem i32 %10, 8
  %12 = sub i32 4, %11
  %13 = mul i32 %12, 2
  %14 = sub i32 %9, %13
  %15 = ashr i32 %7, %14
  %16 = and i32 %15, 1
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct._wfETC1_Block, ptr %17, i32 0, i32 1
  %19 = load i32, ptr %18, align 4, !tbaa !11
  %20 = load i32, ptr %4, align 4, !tbaa !9
  %21 = add i32 16, %20
  %22 = sub i32 32, %21
  %23 = load i32, ptr %4, align 4, !tbaa !9
  %24 = add i32 16, %23
  %25 = urem i32 %24, 8
  %26 = sub i32 4, %25
  %27 = mul i32 %26, 2
  %28 = sub i32 %22, %27
  %29 = ashr i32 %19, %28
  %30 = and i32 %29, 1
  %31 = shl i32 %30, 1
  %32 = or i32 %16, %31
  ret i32 %32
}

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" }

!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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 4}
!12 = !{!"_wfETC1_Block", !10, i64 0, !10, 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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) uwtable
define dso_local range(i32 0, 4) i32 @wfETC1_ReadPixel(ptr nocapture noundef readonly %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 4
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = shl i32 %1, 1
  %6 = and i32 %5, 14
  %7 = sub i32 %6, %1
  %8 = add i32 %7, 24
  %9 = lshr i32 %4, %8
  %10 = and i32 %9, 1
  %11 = add i32 %7, 8
  %12 = lshr i32 %4, %11
  %13 = shl i32 %12, 1
  %14 = and i32 %13, 2
  %15 = or disjoint i32 %14, %10
  ret i32 %15
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(argmem: read) 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, !7, i64 4}
!6 = !{!"_wfETC1_Block", !7, i64 0, !7, i64 4}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass