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[Committed/AARCH64] Fix ThunderX fp vectorizer cost model

Message ID CA+=Sn1n1g7BOodNZiCTXgooniqCROfhQ85T4TOBCuhDR9LZCzw@mail.gmail.com
State New
Headers show

Commit Message

Andrew Pinski July 26, 2017, 9:50 p.m. UTC 
Hi,
  When I went and split the vectorizer cost model to support
thunderx2t99, I did not go back and fix up thunderx to be correct
after the split.
This patch fixes the problem by changing the vector cost for fp to be
the same as scalar fp cost which is good enough and brings us back to
where we were with GCC 6.

Thanks,
Andrew Pinski

ChangeLog:
* config/aarch64/aarch64.c (thunderx_vector_cost): Fix vec_fp_stmt_cost.
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Patch

Index: config/aarch64/aarch64.c
===================================================================
--- config/aarch64/aarch64.c	(revision 250529)
+++ config/aarch64/aarch64.c	(working copy)
@@ -390,7 +390,7 @@  static const struct cpu_vector_cost thun
   3, /* scalar_load_cost  */
   1, /* scalar_store_cost  */
   4, /* vec_int_stmt_cost  */
-  4, /* vec_fp_stmt_cost  */
+  1, /* vec_fp_stmt_cost  */
   4, /* vec_permute_cost  */
   2, /* vec_to_scalar_cost  */
   2, /* scalar_to_vec_cost  */