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[Patch AArch64] Fix for PR62040

From: Carrot Wei <carrot at google dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Date: Tue, 19 Aug 2014 16:43:02 -0700
Subject: [Patch AArch64] Fix for PR62040
Authentication-results: sourceware.org; auth=none

Hi

Current AArch64 backend can generate rtl expressions like
(vec_duplicate:DI (const_int 0 [0])), which causes ICE in
simplify_const_unary_operation because vec_duplicate should generate
vector mode only.

As suggested by Andrew in the bug entry, I split the original insn
patterns to avoid scalar mode vec_duplicate expression.

Passed regression tests on qemu without failure.
OK for trunk and 4.9 branch?

thanks
Guozhi Wei

2014-08-19  Guozhi Wei  <carrot@google.com>

        PR target/62040
        * config/aarch64/iterators.md (VQ_NO2E, VQ_2E): New iterators.
        * config/aarch64/aarch64-simd.md (move_lo_quad_internal_<mode>): Split
        it into two patterns.
        (move_lo_quad_internal_be_<mode>): Likewise.

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Follow-Ups:
- Re: [Patch AArch64] Fix for PR62040
  - From: Kyrill Tkachov

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