setindex bounds checking regression on 1.1 (InvalidIRError)

[maleadt]

The following works on Julia 1.0, not on 1.1:

using CuArrays

A = CuArray{Float64}(undef, 1, 1)
A[1:1, 1:1] .= 0

Execute with julia --check-bounds=yes (cfr. tests)

Reason: unsupported call to the Julia runtime (call to jl_gc_pool_alloc)
Stacktrace:
 [1] throw_boundserror at subarray.jl:43
 [2] checkbounds at abstractarray.jl:449
 [3] setindex! at subarray.jl:268
 [4] _setindex! at abstractarray.jl:1050
 [5] setindex! at abstractarray.jl:1020
 [6] #23 at /home/tbesard/Julia/GPUArrays/src/broadcast.jl:50

CUDAnative should catch calls to throw_boundserror and null them, which for some reason doesn't seem to be happening for this example. This is the reason tests have been failing on -dev for a while.

[maleadt]

Bisected to JuliaLang/julia#29867 (cc @KristofferC).
That diff explains what is going wrong. In CUDAnative, we replace the site where throw happens to make them GPU compatible. But nowadays those functions are @noinline, which is why we rewrite functions called throw_foo*. The above PR uses a differently named function, __subarray_throw_boundserror, which doesn't trigger that heuristic.

[maleadt]

Instead of rewriting those throw functions we should probably try and get rid of calls to jl_gc_pool_alloc when the result is unused.

[maleadt]

Even with #314, this change is more harmful since it also contains an invoke:

ERROR: LoadError: InvalidIRError: compiling #23(CuArrays.CuKernelState, SubArray{Float64,2,CuDeviceArray{Float64,2,CUDAnative.AS.Global},Tuple{UnitRange{Int64},UnitRange{Int64}},false}, Base.Broadcast.Broadcasted{Nothing,Tuple{Base.OneTo{Int64},Base.OneTo{Int64}},typeof(identity),Tuple{Int64}}) resulted in invalid LLVM IR
Reason: unsupported call to the Julia runtime (call to jl_box_int64)
Stacktrace:
 [1] throw_boundserror at subarray.jl:43
 [2] checkbounds at abstractarray.jl:449
 [3] setindex! at subarray.jl:268
 [4] _setindex! at abstractarray.jl:1050
 [5] setindex! at abstractarray.jl:1020
 [6] #23 at /home/tbesard/Julia/GPUArrays/src/broadcast.jl:50
Reason: unsupported call to the Julia runtime (call to jl_invoke)
Stacktrace:
 [1] throw_boundserror at subarray.jl:43
 [2] checkbounds at abstractarray.jl:449
 [3] setindex! at subarray.jl:268
 [4] _setindex! at abstractarray.jl:1050
 [5] setindex! at abstractarray.jl:1020
 [6] #23 at /home/tbesard/Julia/GPUArrays/src/broadcast.jl:50