Kernel using `StaticArray` compiles in julia v1.9.4 but not in v1.10.2
lcw opened this issue · comments
Describe the bug
The kernel
function demo(A)
B = MVector{3,SVector{1,Float32}}(undef)
# If `@inbounds` is added to this loop the code compiles
for o = 1:3
B[o] = A[o] * SVector{1,Float32}(1.0f0)
end
return nothing
end
compiles and runs with julia v1.9.4 but fails to compile with julia v1.10.2 with the error:
ERROR: InvalidIRError: compiling MethodInstance for demo(::CuDeviceVector{Float32, 1}) resulted in invalid LLVM IR
Reason: unsupported call to an unknown function (call to julia.new_gc_frame)
Reason: unsupported call to an unknown function (call to julia.push_gc_frame)
Reason: unsupported call to an unknown function (call to julia.get_gc_frame_slot)
Reason: unsupported call to an unknown function (call to julia.pop_gc_frame)
Hint: catch this exception as `err` and call `code_typed(err; interactive = true)` to introspect the erronous code with Cthulhu.jl
Stacktrace:
[1] check_ir(job::GPUCompiler.CompilerJob{GPUCompiler.PTXCompilerTarget, CUDA.CUDACompilerParams}, args::LLVM.Module)
@ GPUCompiler ~/.julia/packages/GPUCompiler/U36Ed/src/validation.jl:147
[2] macro expansion
@ ~/.julia/packages/GPUCompiler/U36Ed/src/driver.jl:440 [inlined]
[3] macro expansion
@ ~/.julia/packages/TimerOutputs/RsWnF/src/TimerOutput.jl:253 [inlined]
[4] macro expansion
@ ~/.julia/packages/GPUCompiler/U36Ed/src/driver.jl:439 [inlined]
[5]
@ GPUCompiler ~/.julia/packages/GPUCompiler/U36Ed/src/utils.jl:92
[6] emit_llvm
@ ~/.julia/packages/GPUCompiler/U36Ed/src/utils.jl:86 [inlined]
[7]
@ GPUCompiler ~/.julia/packages/GPUCompiler/U36Ed/src/driver.jl:129
[8] codegen
@ ~/.julia/packages/GPUCompiler/U36Ed/src/driver.jl:110 [inlined]
[9]
@ GPUCompiler ~/.julia/packages/GPUCompiler/U36Ed/src/driver.jl:106
[10] compile
@ ~/.julia/packages/GPUCompiler/U36Ed/src/driver.jl:98 [inlined]
[11] #1072
@ ~/.julia/packages/CUDA/htRwP/src/compiler/compilation.jl:247 [inlined]
[12] JuliaContext(f::CUDA.var"#1072#1075"{GPUCompiler.CompilerJob{GPUCompiler.PTXCompilerTarget, CUDA.CUDACompilerParams}})
@ GPUCompiler ~/.julia/packages/GPUCompiler/U36Ed/src/driver.jl:47
[13] compile(job::GPUCompiler.CompilerJob)
@ CUDA ~/.julia/packages/CUDA/htRwP/src/compiler/compilation.jl:246
[14] actual_compilation(cache::Dict{…}, src::Core.MethodInstance, world::UInt64, cfg::GPUCompiler.CompilerConfig{…}, compiler::typeof(CUDA.compile), linker::typeof(CUDA.link))
@ GPUCompiler ~/.julia/packages/GPUCompiler/U36Ed/src/execution.jl:125
[15] cached_compilation(cache::Dict{…}, src::Core.MethodInstance, cfg::GPUCompiler.CompilerConfig{…}, compiler::Function, linker::Function)
@ GPUCompiler ~/.julia/packages/GPUCompiler/U36Ed/src/execution.jl:103
[16] macro expansion
@ ~/.julia/packages/CUDA/htRwP/src/compiler/execution.jl:367 [inlined]
[17] macro expansion
@ ./lock.jl:267 [inlined]
[18] cufunction(f::typeof(demo), tt::Type{Tuple{CuDeviceVector{Float32, 1}}}; kwargs::@Kwargs{})
@ CUDA ~/.julia/packages/CUDA/htRwP/src/compiler/execution.jl:362
[19] cufunction(f::typeof(demo), tt::Type{Tuple{CuDeviceVector{Float32, 1}}})
@ CUDA ~/.julia/packages/CUDA/htRwP/src/compiler/execution.jl:359
[20] macro expansion
@ ~/.julia/packages/CUDA/htRwP/src/compiler/execution.jl:112 [inlined]
[21] top-level scope
@ ~/.julia/packages/GPUCompiler/U36Ed/src/reflection.jl:206
[22] top-level scope
@ ~/.julia/packages/CUDA/htRwP/src/initialization.jl:206
Some type information was truncated. Use `show(err)` to see complete types.
To reproduce
The Minimal Working Example (MWE) for this bug:
using CUDA
using StaticArrays
A = CUDA.zeros(Float32, 3)
function demo(A)
B = MVector{3,SVector{1,Float32}}(undef)
# If `@inbounds` is added to this loop the code compiles
for o = 1:3
B[o] = A[o] * SVector{1,Float32}(1.0f0)
end
return nothing
end
@cuda demo(A)
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Julia v1.9.4 Manifest.toml
# This file is machine-generated - editing it directly is not advised
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[[deps.Random]]
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uuid = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
[[deps.Random123]]
deps = ["Random", "RandomNumbers"]
git-tree-sha1 = "4743b43e5a9c4a2ede372de7061eed81795b12e7"
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[[deps.RandomNumbers]]
deps = ["Random", "Requires"]
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[[deps.SHA]]
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[[deps.SentinelArrays]]
deps = ["Dates", "Random"]
git-tree-sha1 = "0e7508ff27ba32f26cd459474ca2ede1bc10991f"
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[[deps.Serialization]]
uuid = "9e88b42a-f829-5b0c-bbe9-9e923198166b"
[[deps.Sockets]]
uuid = "6462fe0b-24de-5631-8697-dd941f90decc"
[[deps.SortingAlgorithms]]
deps = ["DataStructures"]
git-tree-sha1 = "66e0a8e672a0bdfca2c3f5937efb8538b9ddc085"
uuid = "a2af1166-a08f-5f64-846c-94a0d3cef48c"
version = "1.2.1"
[[deps.SparseArrays]]
deps = ["Libdl", "LinearAlgebra", "Random", "Serialization", "SuiteSparse_jll"]
uuid = "2f01184e-e22b-5df5-ae63-d93ebab69eaf"
[[deps.StaticArrays]]
deps = ["LinearAlgebra", "PrecompileTools", "Random", "StaticArraysCore"]
git-tree-sha1 = "bf074c045d3d5ffd956fa0a461da38a44685d6b2"
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StaticArraysStatisticsExt = "Statistics"
[deps.StaticArrays.weakdeps]
ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
[[deps.StaticArraysCore]]
[deps.StaticArrays.extensions]
StaticArraysChainRulesCoreExt = "ChainRulesCore"
StaticArraysStatisticsExt = "Statistics"
[deps.StaticArrays.weakdeps]
ChainRulesCore = "d360d2e6-b24c-11e9-a2a3-2a2ae2dbcce4"
Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
[[deps.StaticArraysCore]]
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[[deps.TableTraits]]
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[[deps.Tables]]
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version = "1.11.1"
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[[deps.Test]]
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uuid = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
[[deps.TimerOutputs]]
deps = ["ExprTools", "Printf"]
git-tree-sha1 = "f548a9e9c490030e545f72074a41edfd0e5bcdd7"
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[[deps.Unicode]]
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[[deps.Zlib_jll]]
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Expected behavior
I expect the code to compile on both versions of julia.
Version info
Details on Julia:
julia> versioninfo(verbose=true)
Julia Version 1.10.2
Commit bd47eca2c8a (2024-03-01 10:14 UTC)
Build Info:
Official https://julialang.org/ release
Platform Info:
OS: Linux (x86_64-linux-gnu)
uname: Linux 6.1.82 #1-NixOS SMP PREEMPT_DYNAMIC Fri Mar 15 18:27:50 UTC 2024 x86_64 unknown
CPU: AMD Ryzen 9 7950X 16-Core Processor:
speed user nice sys idle irq
#1-32 3111 MHz 9230 s 445 s 2365 s 4342371 s 0 s
Memory: 61.937007904052734 GB (57126.453125 MB free)
Uptime: 13620.16 sec
Load Avg: 0.13 0.1 0.09
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-15.0.7 (ORCJIT, znver3)
Threads: 1 default, 0 interactive, 1 GC (on 32 virtual cores)
Environment:
LD_LIBRARY_PATH = /nix/store/1bapla8zwlx128i42wi08zbiibwk6gm3-libglvnd-1.7.0/lib:/nix/store/chsnmb6qwq9hbjc4xp6fxlsvbxxqaawd-nvidia-x11-545.29.02-nixGL/lib:/nix/store/24d236bvx1yn0s2l2iymlh6bajrc0kgk-nvidia-x11-545.29.02-nixGL-lib32/lib:/nix/store/gaad1akyzhij4pigidhj2zk8p9v1rjy6-libglvnd-1.7.0/lib:/nix/store/j2k44gyws2wlx3xrkv54zv0nhjihr0a5-pipewire-1.0.1-jack/lib
NIX_LD_LIBRARY_PATH = /run/current-system/sw/share/nix-ld/lib
JAVA_HOME = /nix/store/iqz8lfhx69qxb0ydixfldsf0wiw87q34-openjdk-21+35/lib/openjdk
XCURSOR_PATH = /home/lucas/.icons:/home/lucas/.local/share/icons:/home/lucas/.nix-profile/share/icons:/home/lucas/.nix-profile/share/pixmaps:/nix/profile/share/icons:/nix/profile/share/pixmaps:/home/lucas/.local/state/nix/profile/share/icons:/home/lucas/.local/state/nix/profile/share/pixmaps:/etc/profiles/per-user/lucas/share/icons:/etc/profiles/per-user/lucas/share/pixmaps:/nix/var/nix/profiles/default/share/icons:/nix/var/nix/profiles/default/share/pixmaps:/run/current-system/sw/share/icons:/run/current-system/sw/share/pixmaps:/home/lucas/.nix-profile/share/icons
TMUX_PLUGIN_MANAGER_PATH = /home/lucas/.tmux/plugins/
GNUPGHOME = /home/lucas/.gnupg
NIX_PATH = nixpkgs=/nix/store/dc4k1xnrq4g92n2n9j1nfvahlnq4gr5l-source
HOME = /home/lucas
INFOPATH = /home/lucas/.nix-profile/info:/home/lucas/.nix-profile/share/info:/nix/profile/info:/nix/profile/share/info:/home/lucas/.local/state/nix/profile/info:/home/lucas/.local/state/nix/profile/share/info:/etc/profiles/per-user/lucas/info:/etc/profiles/per-user/lucas/share/info:/nix/var/nix/profiles/default/info:/nix/var/nix/profiles/default/share/info:/run/current-system/sw/info:/run/current-system/sw/share/info
TERM = tmux-256color
GTK_PATH = /home/lucas/.nix-profile/lib/gtk-2.0:/home/lucas/.nix-profile/lib/gtk-3.0:/home/lucas/.nix-profile/lib/gtk-4.0:/nix/profile/lib/gtk-2.0:/nix/profile/lib/gtk-3.0:/nix/profile/lib/gtk-4.0:/home/lucas/.local/state/nix/profile/lib/gtk-2.0:/home/lucas/.local/state/nix/profile/lib/gtk-3.0:/home/lucas/.local/state/nix/profile/lib/gtk-4.0:/etc/profiles/per-user/lucas/lib/gtk-2.0:/etc/profiles/per-user/lucas/lib/gtk-3.0:/etc/profiles/per-user/lucas/lib/gtk-4.0:/nix/var/nix/profiles/default/lib/gtk-2.0:/nix/var/nix/profiles/default/lib/gtk-3.0:/nix/var/nix/profiles/default/lib/gtk-4.0:/run/current-system/sw/lib/gtk-2.0:/run/current-system/sw/lib/gtk-3.0:/run/current-system/sw/lib/gtk-4.0
QTWEBKIT_PLUGIN_PATH = /home/lucas/.nix-profile/lib/mozilla/plugins/:/nix/profile/lib/mozilla/plugins/:/home/lucas/.local/state/nix/profile/lib/mozilla/plugins/:/etc/profiles/per-user/lucas/lib/mozilla/plugins/:/nix/var/nix/profiles/default/lib/mozilla/plugins/:/run/current-system/sw/lib/mozilla/plugins/
LIBEXEC_PATH = /home/lucas/.nix-profile/lib/libexec:/nix/profile/lib/libexec:/home/lucas/.local/state/nix/profile/lib/libexec:/etc/profiles/per-user/lucas/lib/libexec:/nix/var/nix/profiles/default/lib/libexec:/run/current-system/sw/lib/libexec
PATH = /run/wrappers/bin:/home/lucas/.nix-profile/bin:/nix/profile/bin:/home/lucas/.local/state/nix/profile/bin:/etc/profiles/per-user/lucas/bin:/nix/var/nix/profiles/default/bin:/run/current-system/sw/bin:/home/lucas/.local/bin:/home/lucas/.config/zsh/plugins/fzf-zsh-plugin/bin:/home/lucas/.fzf/bin
NVTX_INJECTION64_PATH = /home/lucas/.julia/artifacts/c0e6b8fff2621303ace1cc360b7fca676b4e28fd/lib/libcupti.so
Details on CUDA:
julia> CUDA.versioninfo()
CUDA runtime 12.3, artifact installation
CUDA driver 12.3
NVIDIA driver 545.29.2
CUDA libraries:
- CUBLAS: 12.3.4
- CURAND: 10.3.4
- CUFFT: 11.0.12
- CUSOLVER: 11.5.4
- CUSPARSE: 12.2.0
- CUPTI: 21.0.0
- NVML: 12.0.0+545.29.2
Julia packages:
- CUDA: 5.2.0
- CUDA_Driver_jll: 0.7.0+1
- CUDA_Runtime_jll: 0.11.1+0
Toolchain:
- Julia: 1.10.2
- LLVM: 15.0.7
1 device:
0: NVIDIA GeForce RTX 4090 (sm_89, 21.084 GiB / 22.488 GiB available)
Additional context
Both versions of julia give the same @device_code_warntype
.
julia> @device_code_warntype @cuda demo(A)
PTX CompilerJob of MethodInstance for demo(::CuDeviceVector{Float32, 1}) for sm_86
MethodInstance for demo(::CuDeviceVector{Float32, 1})
from demo(A) @ Main ~/research/code/julia/bug/demo.jl:6
Arguments
#self#::Core.Const(demo)
A::CuDeviceVector{Float32, 1}
Locals
@_3::Union{Nothing, Tuple{Int64, Int64}}
B::MVector{3, SVector{1, Float32}}
o::Int64
Body::Nothing
1 ─ %1 = Main.MVector::Core.Const(MVector)
│ %2 = Core.apply_type(Main.SVector, 1, Main.Float32)::Core.Const(SVector{1, Float32})
│ %3 = Core.apply_type(%1, 3, %2)::Core.Const(MVector{3, SVector{1, Float32}})
│ (B = (%3)(Main.undef))
│ %5 = (1:3)::Core.Const(1:3)
│ (@_3 = Base.iterate(%5))
│ %7 = (@_3::Core.Const((1, 1)) === nothing)::Core.Const(false)
│ %8 = Base.not_int(%7)::Core.Const(true)
└── goto #4 if not %8
2 ┄ %10 = @_3::Tuple{Int64, Int64}
│ (o = Core.getfield(%10, 1))
│ %12 = Core.getfield(%10, 2)::Int64
│ %13 = Base.getindex(A, o)::Float32
│ %14 = Core.apply_type(Main.SVector, 1, Main.Float32)::Core.Const(SVector{1, Float32})
│ %15 = (%14)(1.0f0)::Core.Const(Float32[1.0])
│ %16 = (%13 * %15)::SVector{1, Float32}
│ Base.setindex!(B, %16, o)
│ (@_3 = Base.iterate(%5, %12))
│ %19 = (@_3 === nothing)::Bool
│ %20 = Base.not_int(%19)::Bool
└── goto #4 if not %20
3 ─ goto #2
4 ┄ return Main.nothing
MArray is an unreliable type that makes your code depends on the optimizations of the LLVM-level allocopt pass. You should be using an array type that doesn't rely on mutable semantics that are then optimized away.
That said, with this specific example it looks like Base codegen for Vector{Float32}
does result in optimized code, so it may be interesting to look into why.
Thanks for taking a look! Do you have a suggested array type?
This example is a reduction from a Kernel Abstractions kernel https://github.com/HorribleSanity/Raven.jl/blob/971310fdb4a691281b33b0a6114f8cd2c4d1f01f/src/lobattocells.jl#L2441-L2583
where I am using the MArray
via @private
. If this is not recommended, I am confused why KernelAbstractions is using it. Will this not cause problems when JuliaGPU/GPUArrays.jl#525 lands?
That said, I have found a mutable array of registers quite useful to minimize code duplication, e.g,
Lines 96 to 223 in 7f725c0
Are you saying there is not a recommended way of achieving this?
If this is not recommended, I am confused why KernelAbstractions is using it.
Because we don't have a good way to express a mutable, on-stack array type in Julia right now. IIUC, ImmutableArrays were supposed to solve this, but that effort stalled.
A safer way is to use an immutable array type and Base.setindex
, possibly using a convenience macro like Setfield.jl. That's what I did in https://github.com/JuliaGPU/GemmKernels.jl/blob/master/src/array.jl, and should probably be ported to StaticArrays.jl' SArray.jl.
In the mean time, using MArray isn't bad per se, you just have to be aware of its fragility, meaning that minor changes to Julia's codegen can result in LLVM becoming confused and your previously stack-allocated MArray now becoming heap allocated (and as a result GPU incompatible).
# If
@inbounds is added to this loop the code compiles
I think the core issue here is that the boundserror
for MArray
captures the object. Causing it to escape.
In KA I am very cautious about this using @inbounds
to avoid this issue, since as Tim said we are relying on an optimization here.
Because we don't have a good way to express a mutable, on-stack array type in Julia right now. IIUC, ImmutableArrays were supposed to solve this, but that effort stalled.
That is too bad. That is what I really want.
A safer way is to use an immutable array type and Base.setindex, possibly using a convenience macro like Setfield.jl.
Thanks for the references. They seem reasonable for the uses I have of MArrays
inside CUDA kernels. Using them for KA @private
seems like it would need an API change.
# If
@inboundsis added to this loop the code compiles
I think the core issue here is that the
boundserror
forMArray
captures the object. Causing it to escape. In KA I am very cautious about this using@inbounds
to avoid this issue, since as Tim said we are relying on an optimization here.
I think this is the issue as well. Two questions:
The issue presents itself when I am running the tests where bounds checking is turned on everwhere.
Yeah globally turning on bounds checking with break @private
:/
Yeah as long as checkbounds
doesn't require v
. Instead one could just pass the axes
This pr #2314 fixes my current issue. I understand that is it probably not the most desirable solution but wonder if it is something worth adding because of KA's current reliance on MArray
for @private
.
I'm not opposed to such a quirk if it's required, but I'm surprised it's necessary in the first place as the CPU compilation pipeline does properly optimize everything away already.
With --checkbounds=true
we will eventually see a call to throw_boundserror(A, I)
. Which is @noinline
and creates a BoundError
that captures A
.
Last time I checked this would also happen on the CPU pipeline and is a side-effect of our BoundsError design.
With
--checkbounds=true
we will eventually see a call tothrow_boundserror(A, I)
.
Sure, for that case the quirk is probably still useful. However, without that the MWE from this thread does only reproduce using GPUCompiler.jl, so might be worth looking into.
I haven't found the difference yet, but I suspect it's in the optimization pipeline.
Pre-optimizations:
1.10
%newstruct = call noalias nonnull dereferenceable(12) {} addrspace(10)* @julia.gc_alloc_obj({}** %current_task1, i64 12, {} addrspace(10)* addrspacecast ({}* inttoptr (i64 139432096781136 to {}*) to {} addrspace(10)*)) #0, !dbg !75
%7 = addrspacecast {} addrspace(10)* %newstruct to {} addrspace(11)*, !dbg !75
...
L36: ; preds = %L30
%30 = addrspacecast [1 x i64]* %newstruct8 to [1 x i64] addrspace(11)*, !dbg !185
call fastcc void @julia__throw_boundserror_1165({} addrspace(10)* %newstruct, [1 x i64] addrspace(11)* nocapture readonly %30) #7, !dbg !185
call void @llvm.trap(), !dbg !185
call void asm sideeffect "exit;", ""(), !dbg !185
unreachable, !dbg !185
1.9
%10 = call noalias nonnull {} addrspace(10)* @julia.gc_alloc_obj({}** %current_task1, i64 12, {} addrspace(10)* addrspacecast ({}* inttoptr (i64 135179767675600 to {}*) to {} addrspace(10)*)) #2, !dbg !77
%11 = addrspacecast {} addrspace(10)* %10 to {} addrspace(11)*, !dbg !77
...
L36: ; preds = %L30
; ││ @ abstractarray.jl:709 within `checkbounds`
%44 = addrspacecast [1 x i64]* %5 to [1 x i64] addrspace(11)*, !dbg !188
call fastcc void @julia__throw_boundserror_2843({} addrspace(10)* %10, [1 x i64] addrspace(11)* nocapture readonly %44) #8, !dbg !188
call void @llvm.trap(), !dbg !188
call void asm sideeffect "exit;", ""(), !dbg !188
unreachable, !dbg !188
Post-opt
1.10
; @ REPL[4]:2 within `demo`
; ┌ @ /home/vchuravy/.julia/packages/StaticArraysCore/P6PH7/src/StaticArraysCore.jl:197 within `MArray`
%2 = call fastcc {}* @gpu_gc_pool_alloc({ i64, i32 } %state, i64 12), !dbg !140
; └
...
L36: ; preds = %L20.postloop
%9 = getelementptr inbounds [1 x i64], [1 x i64]* %newstruct8, i64 0, i64 0
; @ REPL[4]:6 within `demo`
; ┌ @ /home/vchuravy/.julia/packages/StaticArrays/EHHaF/src/MArray.jl:31 within `setindex!`
; │┌ @ abstractarray.jl:700 within `checkbounds`
store i64 %value_phi.postloop, i64* %9, align 8, !dbg !189, !tbaa !155, !alias.scope !159, !noalias !162
%10 = call {}** @julia.get_gc_frame_slot({}** nonnull %gcframe, i32 0)
store {}* %2, {}** %10, align 8
; ││ @ abstractarray.jl:702 within `checkbounds`
call fastcc void @julia__throw_boundserror_1584({ i64, i32 } %state), !dbg !191
call void @llvm.trap(), !dbg !191
call void asm sideeffect "exit;", ""(), !dbg !191
unreachable, !dbg !191
1.9
; @ REPL[4]:2 within `demo`
; ┌ @ /home/vchuravy/.julia/packages/StaticArraysCore/P6PH7/src/StaticArraysCore.jl:197 within `MArray`
%4 = call fastcc {}* @gpu_gc_pool_alloc({ i64, i32 } %state, i64 12), !dbg !138
%5 = icmp sgt i64 %.fca.2.0.extract, 0
%6 = select i1 %5, i64 %.fca.2.0.extract, i64 0
%7 = bitcast i8 addrspace(1)* %.fca.0.extract to float addrspace(1)*
; └
....
L36: ; preds = %L20.postloop
%13 = getelementptr inbounds [1 x i64], [1 x i64]* %3, i64 0, i64 0
; @ REPL[4]:6 within `demo`
; ┌ @ /home/vchuravy/.julia/packages/StaticArrays/EHHaF/src/MArray.jl:31 within `setindex!`
; │┌ @ abstractarray.jl:707 within `checkbounds`
store i64 %value_phi.postloop, i64* %13, align 8, !dbg !186, !tbaa !152, !alias.scope !156, !noalias !159
; ││ @ abstractarray.jl:709 within `checkbounds`
call fastcc void @julia__throw_boundserror_2854({ i64, i32 } %state), !dbg !188
call void @llvm.trap(), !dbg !188
call void asm sideeffect "exit;", ""(), !dbg !188
unreachable, !dbg !188
In both cases dead-arg elimination (which runs very late) removed the actual argument to the CUDA.jl specific throw_boundserror
quirk,
In both cases what remains is a gpu_gc_pool_allocate
, but on 1.9 we didn't insert the corresponding GC push_frame ops.
Okay JuliaGPU/GPUCompiler.jl@cf6bcab fixes this case. Still not ideal since we have a gpu_alloc
, but it does address the regression.
Note the PR is against current GPUCompiler, but locally I had backported it to 0.25
Fixed by JuliaGPU/GPUCompiler.jl#559