From: Richard Stallman <rms@gnu.org>
Date: Thu, 18 Jun 1992 17:38:13 +0000 (+0000)
Subject: *** empty log message ***
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=c09e64987db14029d96c1a2fb0d05a74535f864b;p=gcc.git

*** empty log message ***

From-SVN: r1207
---

diff --git a/gcc/stmt.c b/gcc/stmt.c
index 2c2759686e0..11c122b2b34 100644
--- a/gcc/stmt.c
+++ b/gcc/stmt.c
@@ -1012,7 +1012,8 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
   for (tail = clobbers; tail; tail = TREE_CHAIN (tail))
     {
       char *regname = TREE_STRING_POINTER (TREE_VALUE (tail));
-      if (decode_reg_name (regname) >= 0)
+      i = decode_reg_name (regname);
+      if (i >= 0 || i == -4)
 	++nclobbers;
     }
 
@@ -1183,9 +1184,15 @@ expand_asm_operands (string, outputs, inputs, clobbers, vol, filename, line)
 
 	  if (j < 0)
 	    {
-	      if (j == -3)
+	      if (j == -3)	/* `cc', which is not a register */
 		continue;
 
+	      if (j == -4)	/* `memory', don't cache memory across asm */
+		{
+		  XVECEXP (body, 0, i++) = gen_rtx (CLOBBER, VOIDmode, const0_rtx);
+		  continue;
+		}
+
 	      error ("unknown register name `%s' in `asm'", regname);
 	      return;
 	    }
diff --git a/gcc/varasm.c b/gcc/varasm.c
index be2ad47dc08..be250f4b13f 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -212,8 +212,9 @@ strip_reg_name (name)
 
 /* Decode an `asm' spec for a declaration as a register name.
    Return the register number, or -1 if nothing specified,
-   or -2 if the ASMSPEC is not `cc' and is not recognized,
-   or -3 if ASMSPEC is `cc' and is not recognized.
+   or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
+   or -3 if ASMSPEC is `cc' and is not recognized,
+   or -4 if ASMSPEC is `memory' and is not recognized.
    Accept an exact spelling or a decimal number.
    Prefixes such as % are optional.  */
 
@@ -257,6 +258,9 @@ decode_reg_name (asmspec)
       }
 #endif /* ADDITIONAL_REGISTER_NAMES */
 
+      if (!strcmp (asmspec, "memory"))
+	return -4;
+
       if (!strcmp (asmspec, "cc"))
 	return -3;