[PATCH] PR target/85358: Add target hook to prevent default widening

[Joseph Myers]

On Tue, 5 Jun 2018, Richard Biener wrote:

> Are there other targets with similar kind of (FP) modes or is ppc the 
> only one with this 'legacy'? Also keep in mind that you intended to 
> backport this...

Well, ia64 RFmode probably isn't a sensible mode to include in widening 
either (it's specifically disallowed for arithmetic operations).  Before 
IRIX was obsoleted it used to use something like IBM long double as well 
(the support it used in fp-bit.[ch] still hasn't been removed).

-- 
Joseph S. Myers
joseph@codesourcery.com