[PATCH] Fall-through warnings in combine.c

[Fritz Reese]

I think this is obvious, the following code in combine.c which intends
to fallthrough some switch cases is not marked with 'gcc_fallthrough'
as it should be, thus producing warnings during compilation.

---
Fritz Reese


2016-10-31  Fritz Reese  <fritzore...@gmail.com>

        gcc/combine.c (simplify_compare_const): Mark fallthrough cases.

diff --git a/gcc/combine.c b/gcc/combine.c
index 60a127f..6cbb8cf 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -11414,6 +11414,7 @@ simplify_compare_const (enum rtx_code code, 
machine_mode mode,
          const_op -= 1;
          code = LE;
          /* ... fall through to LE case below.  */
+         gcc_fallthrough ();
        }
       else
        break;
@@ -11443,6 +11444,7 @@ simplify_compare_const (enum rtx_code code, 
machine_mode mode,
          const_op -= 1;
          code = GT;
          /* ... fall through to GT below.  */
+         gcc_fallthrough ();
        }
       else
        break;