On 04/16/14 18:20, seg...@kernel.crashing.org wrote:
On Wed, Apr 16, 2014 at 02:45:28PM -0600, Jeff Law wrote:
Isn't the problem that operands 1 is a MEM which use the same register
as operands 3 in the memory address?
Yes, exactly.
ISTM either removing the memory constraint entirely, or splitting it off
into a separate alternative and only earlyclobbering that alternative
would be better.
Or am I missing something?
No, that does seem better :-)
I tried both your suggestions; the first results in better code. Here's
a new patch. As before, it builds and fixes the testcase, but I didn't
run the testsuite (I have no emulator set up).
Thanks,
Segher
gcc/
PR target/60822
2014-04-16 Segher Boessenkool <seg...@kernel.crashing.org>
* config/m68k/m68k.md (extendplussidi): Don't allow memory for
operand 1.
Thanks. I tweaked the comment and added the testcase to the regression
suite and installed the fix on the trunk.
Jeff
