non-volatile automatic variables in setjmp tests

[Michael Matz]

Hi,

On Mon, 8 Apr 2019, Richard Biener wrote:

> Not sure if in this case we run into an RTL optimization that breaks things
> (PRE / scheduling / invariant motion are candidates).

That's true, what Josef sees might point to a genuine bug in the 
middle-end observed only on msp430; but we do want to make this situation 
work generally, as required by ISO C, not like how it's spelled in our 
manual.


Ciao,
Michael.