On 02-07-14 08:23, Marc Glisse wrote:
In the first example you gave, looking at the pattern (no match_dup, setting the
full register), it seems that it may have wanted "=&" instead of "+&".
[ move discussion from gcc ml to gcc-patches ml ]
Marcus,
The +& constraint on operand 0 of vec_unpack_trunc_<mode> seems wrong, since the
template does not use the operand as input.
This patch fixes that.
OK for trunk if aarch64 build & regtest succeeds ?
Thanks,
- Tom
2014-07-02 Tom de Vries <t...@codesourcery.com>
* config/aarch64/aarch64-simd.md
(define_insn "vec_unpack_trunc_<mode>"): Fix constraint.
diff --git a/gcc/config/aarch64/aarch64-simd.md b/gcc/config/aarch64/aarch64-simd.md
index 1c32f0c..0377de4 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -1018,7 +1018,7 @@
;; For quads.
(define_insn "vec_pack_trunc_<mode>"
- [(set (match_operand:<VNARROWQ2> 0 "register_operand" "+&w")
+ [(set (match_operand:<VNARROWQ2> 0 "register_operand" "=&w")
(vec_concat:<VNARROWQ2>
(truncate:<VNARROWQ> (match_operand:VQN 1 "register_operand" "w"))
(truncate:<VNARROWQ> (match_operand:VQN 2 "register_operand" "w"))))]
--
1.9.1
