r279752 - in /trunk/gcc: ChangeLog testsuite/Ch...

[rsandifo@gcc.gnu.org]

Author: rsandifo
Date: Sun Dec 29 09:27:43 2019
New Revision: 279752

URL: https://gcc.gnu.org/viewcvs?rev=279752&root=gcc&view=rev
Log:
Check for a supported comparison when using EXTRACT_LAST_REDUCTION

The EXTRACT_LAST_REDUCTION handling needs to generate a separate
comparison instruction that feeds the vector mask argument of the
IFN_EXTRACT_LAST call.  We weren't checking whether that comparison
was supported, leading to an ICE on the testcase.

2019-12-29  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-vect-stmts.c (vectorizable_condition): For extract-last
	reductions, check that the target supports the required comparison
	operation.

gcc/testsuite/
	* gcc.dg/vect/vect-cond-12.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/vect/vect-cond-12.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vect-stmts.c