Fix "TODO forward zero-set of arraycopy used memset rather than runtime type "

[vchuravy]

Enzyme.jl/src/rules/llvmrules.jl

Lines 335 to 336 in 8dde034

	GPUCompiler.@safe_warn "TODO forward zero-set of arraycopy used memset rather than runtime type $btstr"
	LLVM.memset!(B, get_array_data(B, shadowres), LLVM.ConstantInt(i8, 0, false), length, algn)

Enzyme.jl/src/rules/llvmrules.jl

Lines 358 to 359 in 8dde034

	GPUCompiler.@safe_warn "TODO forward zero-set of arraycopy used memset rather than runtime type $btstr"
	LLVM.memset!(B, get_array_data(B, callv), LLVM.ConstantInt(i8, 0, false), length, algn)

I just got log-spammed with this:

┌ Warning: TODO forward zero-set of arraycopy used memset rather than runtime type 
│ Caused by:
│ Stacktrace:
│  [1] copy
│    @ ./array.jl:411
│  [2] unaliascopy
│    @ ./abstractarray.jl:1497
│  [3] unalias
│    @ ./abstractarray.jl:1481
│  [4] copyto!
│    @ ./abstractarray.jl:1067
│  [5] set!
│    @ ~/src/Chmy/src/Fields/field.jl:98
│  [6] set!
│    @ ~/src/Chmy/src/Fields/field.jl:0
└ @ Enzyme.Compiler ~/.julia/packages/GPUCompiler/y4cj1/src/utils.jl:59

[vchuravy]

Log-spam was triggered by #1779 (comment)