re PR tree-optimization/84777 (-Os inhibits all vectorization)

2018-03-12  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/84777
	* tree-ssa-loop-ch.c (should_duplicate_loop_header_p): For
	force-vectorize loops ignore whether we are optimizing for size.

From-SVN: r258444

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 59aa9f388e23d783ac3275cb5158c86f3b14b7c3..bc08bae91febed42387026880178d6c44032f3d2 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-03-12  Richard Biener  <rguenther@suse.de>
+
+       PR tree-optimization/84777
+       * tree-ssa-loop-ch.c (should_duplicate_loop_header_p): For
+       force-vectorize loops ignore whether we are optimizing for size.
+
 2018-03-12  Chung-Ju Wu  <jasonwucj@gmail.com>
 
        * config/nds32/nds32.c (nds32_md_asm_adjust): New function.

diff --git a/gcc/tree-ssa-loop-ch.c b/gcc/tree-ssa-loop-ch.c
index b2dee48e5d7f9455c072c36fddbff3d662c9f32a..488999dd8ce3c17bbc54a78e5156e47b5e3de7cd 100644 (file)
--- a/gcc/tree-ssa-loop-ch.c
+++ b/gcc/tree-ssa-loop-ch.c
@@ -57,7 +57,8 @@ should_duplicate_loop_header_p (basic_block header, struct loop *loop,
      be true, since quite often it is possible to verify that the condition is
      satisfied in the first iteration and therefore to eliminate it.  Jump
      threading handles these cases now.  */
-  if (optimize_loop_for_size_p (loop))
+  if (optimize_loop_for_size_p (loop)
+      && !loop->force_vectorize)
     {
       if (dump_file && (dump_flags & TDF_DETAILS))
        fprintf (dump_file,