memory.copy: use nop reductions only for ignoreImplicitTraps #3074
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According to changes in spec:
WebAssembly/bulk-memory-operations#124
WebAssembly/bulk-memory-operations#145
we unfortunately can't fold to
nop
even formemory.copy(x, y, 0)
.So this PR revert all reductions to
nop
but do this only underignoreImplicitTraps
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