prevent zero-extension when using a memory load instruction

[Marc Glisse]

On Sat, 18 Apr 2020, William Tambe via Gcc-help wrote:

> In the machine description file, is there a way to tell GCC that a
> memory load instruction already zero-extend such that it does not try
> to apply zero-extension ?

I would look at it the other way around: you can tell GCC what asm to 
generate for a zero_extend with a memory operand. Or did you have a 
specific example in mind?

-- 
Marc Glisse