http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45359

--- a/gcc/config/i386/driver-i386.c	2010-10-31 22:17:24.900000001 +0200
+++ b/gcc/config/i386/driver-i386.c	2010-11-01 06:14:40.360000003 +0200
@@ -351,7 +351,8 @@ detect_caches_intel (bool xeon_mp, unsig
 enum vendor_signatures
 {
   SIG_INTEL =	0x756e6547 /* Genu */,
-  SIG_AMD =	0x68747541 /* Auth */
+  SIG_AMD =	0x68747541 /* Auth */,
+  SIG_VIA =	0x746e6543 /* Cent */
 };
 
 enum processor_signatures
@@ -468,7 +469,8 @@ const char *host_detect_local_cpu (int a
 
   if (!arch)
     {
-      if (vendor == SIG_AMD)
+      if (vendor == SIG_AMD || vendor == SIG_VIA)
+	/* FIXME: + transmeta + cyrix fam5/mod5 */
 	cache = detect_caches_amd (ext_level);
       else if (vendor == SIG_INTEL)
 	{
@@ -501,6 +503,24 @@ const char *host_detect_local_cpu (int a
       else
 	processor = PROCESSOR_PENTIUM;
     }
+  else if (vendor == SIG_VIA)
+     if (family == 6)
+	if (has_longmode)
+	  cpu = "core2";
+	else if (model > 9)
+	  cpu = arch ? "prescott" : "core2";
+	else if (model == 9)
+	  cpu = "c3-2";
+	else if (model >= 6)
+	  cpu = "c3";
+	else
+	  processor = PROCESSOR_GENERIC32;
+     else if (has_3dnow)
+	cpu = "winchip2";
+     else if (has_mmx)
+	cpu = "winchip-c6";
+     else
+	processor = PROCESSOR_GENERIC32;
   else
     {
       switch (family)