Hi Alan,
On 07/07/15 13:34, Alan Lawrence wrote:
As per https://gcc.gnu.org/ml/gcc-patches/2015-04/msg01334.html
+ if (fcode == ARM_BUILTIN_NEON_LANE_CHECK)
+ {
+ tree nlanes = CALL_EXPR_ARG (exp, 0);
+ gcc_assert (TREE_CODE (nlanes) == INTEGER_CST);
+ rtx lane_idx = expand_normal (CALL_EXPR_ARG (exp, 1));
+ if (CONST_INT_P (lane_idx))
+ neon_lane_bounds (lane_idx, 0, TREE_INT_CST_LOW (nlanes), exp);
+ else
+ error ("%Klane index must be a constant immediate", exp);
+ /* Don't generate any RTL. */
+ return const0_rtx;
+ }
Can you please add a comment on top of this saying that this builtin only
exists to perform the
lane check, just to make it explicit for the future.
Ok with a comment added.
Thanks,
Kyrill
