; LLVM IR from PyCee/NUS_library :: src/gpu (NUS_multi_gpu)

; 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.NUS_multi_gpu = type { ptr, i32 }
%struct.NUS_gpu = type { ptr, ptr, ptr, %struct.NUS_vk_device_functions, ptr, ptr, %struct.VkPhysicalDeviceMemoryProperties, i32, i32 }
%struct.NUS_vk_device_functions = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }
%struct.VkPhysicalDeviceMemoryProperties = type { i32, [32 x %struct.VkMemoryType], i32, [16 x %struct.VkMemoryHeap] }
%struct.VkMemoryType = type { i32, i32 }
%struct.VkMemoryHeap = type { i64, 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: nounwind uwtable
define dso_local void @nus_multi_gpu_free(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %4

4:                                                ; preds = %17, %1
  %5 = load i32, ptr %3, align 4, !tbaa !9
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.NUS_multi_gpu, ptr %6, i32 0, i32 1
  %8 = load i32, ptr %7, align 8, !tbaa !11
  %9 = icmp ult i32 %5, %8
  br i1 %9, label %10, label %20

10:                                               ; preds = %4
  %11 = load ptr, ptr %2, align 8, !tbaa !5
  %12 = getelementptr inbounds %struct.NUS_multi_gpu, ptr %11, i32 0, i32 0
  %13 = load ptr, ptr %12, align 8, !tbaa !13
  %14 = load i32, ptr %3, align 4, !tbaa !9
  %15 = zext i32 %14 to i64
  %16 = getelementptr inbounds %struct.NUS_gpu, ptr %13, i64 %15
  call void @nus_gpu_free(ptr noundef %16)
  br label %17

17:                                               ; preds = %10
  %18 = load i32, ptr %3, align 4, !tbaa !9
  %19 = add i32 %18, 1
  store i32 %19, ptr %3, align 4, !tbaa !9
  br label %4, !llvm.loop !14

20:                                               ; preds = %4
  %21 = load ptr, ptr %2, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct.NUS_multi_gpu, ptr %21, i32 0, i32 0
  %23 = load ptr, ptr %22, align 8, !tbaa !13
  call void @free(ptr noundef %23) #4
  %24 = load ptr, ptr %2, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.NUS_multi_gpu, ptr %24, i32 0, i32 0
  store ptr null, ptr %25, align 8, !tbaa !13
  %26 = load ptr, ptr %2, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct.NUS_multi_gpu, ptr %26, i32 0, i32 1
  store i32 0, ptr %27, align 8, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  ret void
}

declare void @nus_gpu_free(ptr noundef) #2

; Function Attrs: nounwind
declare void @free(ptr 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 = { "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 "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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"NUS_multi_gpu", !6, i64 0, !10, i64 8}
!13 = !{!12, !6, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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"

%struct.NUS_gpu = type { ptr, ptr, ptr, %struct.NUS_vk_device_functions, ptr, ptr, %struct.VkPhysicalDeviceMemoryProperties, i32, i32 }
%struct.NUS_vk_device_functions = type { ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr }
%struct.VkPhysicalDeviceMemoryProperties = type { i32, [32 x %struct.VkMemoryType], i32, [16 x %struct.VkMemoryHeap] }
%struct.VkMemoryType = type { i32, i32 }
%struct.VkMemoryHeap = type { i64, i32 }

; Function Attrs: nounwind uwtable
define dso_local void @nus_multi_gpu_free(ptr nocapture noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load i32, ptr %2, align 8, !tbaa !5
  %.not = icmp eq i32 %3, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %1 ]
  %4 = load ptr, ptr %0, align 8, !tbaa !11
  %5 = getelementptr inbounds %struct.NUS_gpu, ptr %4, i64 %indvars.iv
  tail call void @nus_gpu_free(ptr noundef %5) #3
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %6 = load i32, ptr %2, align 8, !tbaa !5
  %7 = zext i32 %6 to i64
  %8 = icmp ult i64 %indvars.iv.next, %7
  br i1 %8, label %.lr.ph, label %._crit_edge, !llvm.loop !12

._crit_edge:                                      ; preds = %.lr.ph, %1
  %9 = load ptr, ptr %0, align 8, !tbaa !11
  tail call void @free(ptr noundef %9) #3
  store ptr null, ptr %0, align 8, !tbaa !11
  store i32 0, ptr %2, align 8, !tbaa !5
  ret void
}

declare void @nus_gpu_free(ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture 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 = { "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 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 #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, !10, i64 8}
!6 = !{!"NUS_multi_gpu", !7, i64 0, !10, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass