It's unclear whether we'll handle /* Else, fall through.  */ in the nearest
future, so I'll just change it to a recognizable format instead.

When this is in, I can remove the recently added -Wno-error lines in 
Makefile.in.

Bootstrapped on aarch64-linux.  I'm checking this in.

2016-09-30  Marek Polacek  <pola...@redhat.com>

        * config/aarch64/aarch64-simd.md: Adjust fall through comments.

diff --git gcc/config/aarch64/aarch64-simd.md gcc/config/aarch64/aarch64-simd.md
index f942a54..9ce7f00 100644
--- gcc/config/aarch64/aarch64-simd.md
+++ gcc/config/aarch64/aarch64-simd.md
@@ -2443,7 +2443,7 @@
          comparison = gen_aarch64_cmlt<mode>;
          break;
        }
-      /* Else, fall through.  */
+      /* Fall through.  */
     case UNGE:
       std::swap (operands[2], operands[3]);
       /* Fall through.  */
@@ -2457,7 +2457,7 @@
          comparison = gen_aarch64_cmle<mode>;
          break;
        }
-      /* Else, fall through.  */
+      /* Fall through.  */
     case UNGT:
       std::swap (operands[2], operands[3]);
       /* Fall through.  */

        Marek

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