On 4/27/19 9:26 AM, Segher Boessenkool wrote: > On Sat, Apr 27, 2019 at 08:37:37AM -0600, Jeff Law wrote: >> To fix this without having the two mode pattern I've proposed or a >> pattern which matches the subreg mess above we'd need combine or >> simplify-rtx to simplify the above into something like this (From Andrew P): > > Combine will do this just fine, if the backend didn't force DImode for > extv? Can the extv pattern be made to work for GPI? > > > Segher > SOrry, misspoke.
If we create extv<mode> combine will do the right thing for the tests mentioned in 87763, but we get a regression on a different test (mentioned in my email) which requires the multi-mode pattern to resolve. jeff
