; LLVM IR from alibaba/GCanvas :: core/src/commandbuffer/GCommandBuffer.ll (ZN7gcanvas14GCommandBuffer16parseBufferAlignEm)

; 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.gcanvas::GCommandBuffer" = type { [2 x i32], ptr, i64, i64, i64 }

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN7gcanvas14GCommandBuffer15checkBufferSizeEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) #1 align 2

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

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_ZN7gcanvas14GCommandBuffer16parseBufferAlignEm(ptr noundef nonnull align 8 dereferenceable(40) %0, i64 noundef %1) #2 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i8, align 1
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  %10 = load ptr, ptr %4, align 8
  call void @llvm.lifetime.start.p0(i64 1, ptr %6) #3
  %11 = load i64, ptr %5, align 8, !tbaa !9
  %12 = urem i64 %11, 4
  %13 = trunc i64 %12 to i8
  store i8 %13, ptr %6, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %14 = load i64, ptr %5, align 8, !tbaa !9
  store i64 %14, ptr %7, align 8, !tbaa !9
  %15 = load i8, ptr %6, align 1, !tbaa !11
  %16 = zext i8 %15 to i32
  %17 = icmp ne i32 %16, 0
  br i1 %17, label %18, label %24

18:                                               ; preds = %2
  %19 = load i64, ptr %5, align 8, !tbaa !9
  %20 = add i64 %19, 4
  %21 = load i8, ptr %6, align 1, !tbaa !11
  %22 = zext i8 %21 to i64
  %23 = sub i64 %20, %22
  store i64 %23, ptr %7, align 8, !tbaa !9
  br label %24

24:                                               ; preds = %18, %2
  %25 = load i64, ptr %7, align 8, !tbaa !9
  %26 = call noundef zeroext i1 @_ZN7gcanvas14GCommandBuffer15checkBufferSizeEm(ptr noundef nonnull align 8 dereferenceable(40) %10, i64 noundef %25)
  br i1 %26, label %27, label %38

27:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %28 = getelementptr inbounds %"class.gcanvas::GCommandBuffer", ptr %10, i32 0, i32 1
  %29 = load ptr, ptr %28, align 8, !tbaa !12
  %30 = getelementptr inbounds %"class.gcanvas::GCommandBuffer", ptr %10, i32 0, i32 4
  %31 = load i64, ptr %30, align 8, !tbaa !14
  %32 = getelementptr inbounds i8, ptr %29, i64 %31
  store ptr %32, ptr %8, align 8, !tbaa !5
  %33 = load i64, ptr %7, align 8, !tbaa !9
  %34 = getelementptr inbounds %"class.gcanvas::GCommandBuffer", ptr %10, i32 0, i32 4
  %35 = load i64, ptr %34, align 8, !tbaa !14
  %36 = add i64 %35, %33
  store i64 %36, ptr %34, align 8, !tbaa !14
  %37 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %37, ptr %3, align 8
  store i32 1, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %39

38:                                               ; preds = %24
  store ptr null, ptr %3, align 8
  store i32 1, ptr %9, align 4
  br label %39

39:                                               ; preds = %38, %27
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 1, ptr %6) #3
  %40 = load ptr, ptr %3, align 8
  ret ptr %40
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 = { 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 #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, !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 = !{!7, !7, i64 0}
!12 = !{!13, !6, i64 8}
!13 = !{!"_ZTSN7gcanvas14GCommandBufferE", !7, i64 0, !6, i64 8, !10, i64 16, !10, i64 24, !10, i64 32}
!14 = !{!13, !10, i64 32}


; 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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef zeroext i1 @_ZN7gcanvas14GCommandBuffer15checkBufferSizeEm(ptr noundef nonnull align 8 dereferenceable(40), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef ptr @_ZN7gcanvas14GCommandBuffer16parseBufferAlignEm(ptr noundef nonnull align 8 dereferenceable(40) %0, i64 noundef %1) local_unnamed_addr #1 align 2 {
  %.biased = add i64 %1, 3
  %.09 = and i64 %.biased, -4
  %3 = tail call noundef zeroext i1 @_ZN7gcanvas14GCommandBuffer15checkBufferSizeEm(ptr noundef nonnull align 8 dereferenceable(40) %0, i64 noundef %.09)
  br i1 %3, label %4, label %11

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 8
  %6 = load ptr, ptr %5, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %0, i64 32
  %8 = load i64, ptr %7, align 8, !tbaa !11
  %9 = getelementptr inbounds i8, ptr %6, i64 %8
  %10 = add i64 %8, %.09
  store i64 %10, ptr %7, align 8, !tbaa !11
  br label %11

11:                                               ; preds = %2, %4
  %.0 = phi ptr [ %9, %4 ], [ null, %2 ]
  ret ptr %.0
}

attributes #0 = { inlinehint 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 #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" }

!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, !9, i64 8}
!6 = !{!"_ZTSN7gcanvas14GCommandBufferE", !7, i64 0, !9, i64 8, !10, i64 16, !10, i64 24, !10, i64 32}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!"any pointer", !7, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!6, !10, i64 32}


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