From: Richard Kenner <kenner@gcc.gnu.org>
Date: Thu, 6 May 1993 09:45:47 +0000 (-0400)
Subject: (decode_field_reference): Don't do anything for non-integral fields.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=772ae9f018e47a61c32568babd238c4df4b8f521;p=gcc.git

(decode_field_reference): Don't do anything for non-integral fields.

From-SVN: r4353
---

diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 28a6a760c10..6570ac2a62d 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -2418,6 +2418,12 @@ decode_field_reference (exp, pbitsize, pbitpos, pmode, punsignedp,
   tree inner;
   tree offset;
 
+  /* All the optimizations using this function assume integer fields.  
+     There are problems with FP fields since the type_for_size call
+     below can fail for, e.g., XFmode.  */
+  if (! INTEGRAL_TYPE_P (TREE_TYPE (exp)))
+    return 0;
+
   STRIP_NOPS (exp);
 
   if (TREE_CODE (exp) == BIT_AND_EXPR)