From: Jim Wilson <wilson@gcc.gnu.org>
Date: Wed, 8 Sep 1993 18:58:14 +0000 (-0700)
Subject: (convert_move): When truncating, call force_reg first if
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=431a6ecab3b51c825ecd2f5ad591ca858e4b296a;p=gcc.git

(convert_move): When truncating, call force_reg first if
it is something that gen_lowpart won't understand.

From-SVN: r5287
---

diff --git a/gcc/expr.c b/gcc/expr.c
index cb48acd9c79..0404c6b4a4c 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -870,6 +870,13 @@ convert_move (to, from, unsignedp)
   if (GET_MODE_BITSIZE (from_mode) > BITS_PER_WORD
       && GET_MODE_BITSIZE (to_mode) <= BITS_PER_WORD)
     {
+      if (!((GET_CODE (from) == MEM
+	     && ! MEM_VOLATILE_P (from)
+	     && direct_load[(int) to_mode]
+	     && ! mode_dependent_address_p (XEXP (from, 0)))
+	    || GET_CODE (from) == REG
+	    || GET_CODE (from) == SUBREG))
+	from = force_reg (from_mode, from);
       convert_move (to, gen_lowpart (word_mode, from), 0);
       return;
     }