; LLVM IR from facebookresearch/habitat-sim :: src/deps/basis-universal/encoder (lodepng)

; 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.LodePNGColorMode = type { i32, i32, ptr, i64, i32, i32, i32, i32 }

; 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: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z25lodepng_has_palette_alphaPK16LodePNGColorMode(ptr noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca ptr, align 8
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #2
  store i64 0, ptr %4, align 8, !tbaa !9
  br label %6

6:                                                ; preds = %25, %1
  %7 = load i64, ptr %4, align 8, !tbaa !9
  %8 = load ptr, ptr %3, align 8, !tbaa !5
  %9 = getelementptr inbounds %struct.LodePNGColorMode, ptr %8, i32 0, i32 3
  %10 = load i64, ptr %9, align 8, !tbaa !11
  %11 = icmp ne i64 %7, %10
  br i1 %11, label %12, label %28

12:                                               ; preds = %6
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.LodePNGColorMode, ptr %13, i32 0, i32 2
  %15 = load ptr, ptr %14, align 8, !tbaa !15
  %16 = load i64, ptr %4, align 8, !tbaa !9
  %17 = mul i64 %16, 4
  %18 = add i64 %17, 3
  %19 = getelementptr inbounds i8, ptr %15, i64 %18
  %20 = load i8, ptr %19, align 1, !tbaa !16
  %21 = zext i8 %20 to i32
  %22 = icmp slt i32 %21, 255
  br i1 %22, label %23, label %24

23:                                               ; preds = %12
  store i32 1, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %29

24:                                               ; preds = %12
  br label %25

25:                                               ; preds = %24
  %26 = load i64, ptr %4, align 8, !tbaa !9
  %27 = add i64 %26, 1
  store i64 %27, ptr %4, align 8, !tbaa !9
  br label %6, !llvm.loop !17

28:                                               ; preds = %6
  store i32 0, ptr %2, align 4
  store i32 1, ptr %5, align 4
  br label %29

29:                                               ; preds = %28, %23
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #2
  %30 = load i32, ptr %2, align 4
  ret i32 %30
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 16}
!12 = !{!"_ZTS16LodePNGColorMode", !13, i64 0, !14, i64 4, !6, i64 8, !10, i64 16, !14, i64 24, !14, i64 28, !14, i64 32, !14, i64 36}
!13 = !{!"_ZTS16LodePNGColorType", !7, i64 0}
!14 = !{!"int", !7, i64 0}
!15 = !{!12, !6, i64 8}
!16 = !{!7, !7, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"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"

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) uwtable
define dso_local noundef range(i32 0, 2) i32 @_Z25lodepng_has_palette_alphaPK16LodePNGColorMode(ptr nocapture noundef readonly %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 16
  %3 = load i64, ptr %2, align 8, !tbaa !5
  %.not7 = icmp eq i64 %3, 0
  br i1 %.not7, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1
  %4 = getelementptr inbounds i8, ptr %0, i64 8
  %5 = load ptr, ptr %4, align 8, !tbaa !13
  br label %8

6:                                                ; preds = %8
  %7 = add nuw i64 %.08, 1
  %.not = icmp eq i64 %7, %3
  br i1 %.not, label %._crit_edge, label %8, !llvm.loop !14

8:                                                ; preds = %.lr.ph, %6
  %.08 = phi i64 [ 0, %.lr.ph ], [ %7, %6 ]
  %9 = shl i64 %.08, 2
  %10 = or disjoint i64 %9, 3
  %11 = getelementptr inbounds i8, ptr %5, i64 %10
  %12 = load i8, ptr %11, align 1, !tbaa !16
  %.not6 = icmp eq i8 %12, -1
  br i1 %.not6, label %6, label %._crit_edge

._crit_edge:                                      ; preds = %8, %6, %1
  %.05 = phi i32 [ 0, %1 ], [ 0, %6 ], [ 1, %8 ]
  ret i32 %.05
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, inaccessiblemem: none) 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, !12, i64 16}
!6 = !{!"_ZTS16LodePNGColorMode", !7, i64 0, !10, i64 4, !11, i64 8, !12, i64 16, !10, i64 24, !10, i64 28, !10, i64 32, !10, i64 36}
!7 = !{!"_ZTS16LodePNGColorType", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!"any pointer", !8, i64 0}
!12 = !{!"long", !8, i64 0}
!13 = !{!6, !11, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = !{!8, !8, i64 0}


; Effective O3 passes: GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass