On 07/06/2015 07:41 AM, Bill Schmidt wrote:
Hi,Due to specifics of the POWER architecture, some forms of a vector compare followed by a vector select are represented in RTL as a compare, followed by a logical NOT, followed by the select. This tends to end up generating an extra instruction. This patch adds a case to simplify-rtx.c to remove the logical NOT by reversing the outcomes of the select. I've added a POWER-specific test case that demonstrates that the issue is fixed. Bootstrapped and tested on powerpc64le-unknown-linux-gnu with no regressions. Is this ok for trunk? Thanks, Bill [gcc] 2015-07-06 Bill Schmidt <wschm...@linux.vnet.ibm.com> * simplify-rtx.c (simplify_ternary_operation): Add simplification for (!c) != {0,...,0} ? a : b for vector modes. [gcc/testsuite] 2015-07-06 Bill Schmidt <wschm...@linux.vnet.ibm.com> * gcc.target/powerpc/vec-cmp-sel.c: New test.
OK. jeff
