[PATCH] Comparison with an enum should mention enum value.

[Martin Liška]

Hi.

This is one more clean up of the transition that I've just tested
on x86_64-linux-gnu.

I'm planning to install it once I'll come back from vacation (27/12).

Thanks,
Martin

gcc/ChangeLog:

2018-11-29  Martin Liska  <mli...@suse.cz>

        * builtins.c (expand_movstr): Compare with RETURN_BEGIN.
        * expr.c (move_by_pieces): Likewise.
        (store_by_pieces): Likewise.
        (store_expr): Fix GNU coding style.
---
 gcc/builtins.c | 3 ++-
 gcc/expr.c     | 8 ++++----
 2 files changed, 6 insertions(+), 5 deletions(-)



diff --git a/gcc/builtins.c b/gcc/builtins.c
index dcac49d8be1..5728ee0e86e 100644
--- a/gcc/builtins.c
+++ b/gcc/builtins.c
@@ -3937,7 +3937,8 @@ expand_movstr (tree dest, tree src, rtx target, memop_ret retmode)
       dest_mem = replace_equiv_address (dest_mem, target);
     }
 
-  create_output_operand (&ops[0], retmode ? target : NULL_RTX, Pmode);
+  create_output_operand (&ops[0],
+			 retmode != RETURN_BEGIN ? target : NULL_RTX, Pmode);
   create_fixed_operand (&ops[1], dest_mem);
   create_fixed_operand (&ops[2], src_mem);
   if (!maybe_expand_insn (targetm.code_for_movstr, 3, ops))
diff --git a/gcc/expr.c b/gcc/expr.c
index 85b7847431b..43b129ce5b1 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -1220,7 +1220,7 @@ move_by_pieces (rtx to, rtx from, unsigned HOST_WIDE_INT len,
 
   data.run ();
 
-  if (retmode)
+  if (retmode != RETURN_BEGIN)
     return data.finish_retmode (retmode);
   else
     return to;
@@ -1388,7 +1388,7 @@ store_by_pieces (rtx to, unsigned HOST_WIDE_INT len,
   store_by_pieces_d data (to, constfun, constfundata, len, align);
   data.run ();
 
-  if (retmode)
+  if (retmode != RETURN_BEGIN)
     return data.finish_retmode (retmode);
   else
     return to;
@@ -5609,13 +5609,13 @@ store_expr (tree exp, rtx target, int call_param_p,
 
       dest_mem = target;
 
+      memop_ret retmode = exp_len > str_copy_len ? RETURN_END : RETURN_BEGIN;
       dest_mem = store_by_pieces (dest_mem,
 				  str_copy_len, builtin_strncpy_read_str,
 				  CONST_CAST (char *,
 					      TREE_STRING_POINTER (str)),
 				  MEM_ALIGN (target), false,
-				  (exp_len > str_copy_len ? RETURN_END :
-				   RETURN_BEGIN));
+				  retmode);
       if (exp_len > str_copy_len)
 	clear_storage (adjust_address (dest_mem, BLKmode, 0),
 		       GEN_INT (exp_len - str_copy_len),