gentoo-overlay/sys-devel/llvm/files/llvm-3.1-ivybridge_support.patch

--- llvm/trunk/lib/Support/Host.cpp	2012/04/23 22:22:46	155401
+++ llvm/trunk/lib/Support/Host.cpp	2012/04/23 22:41:39	155402
@@ -230,6 +230,10 @@
       case 45:
         return "corei7-avx";
 
+      // Ivy Bridge:
+      case 58:
+        return "core-avx-i";
+
       case 28: // Intel Atom processor. All processors are manufactured using
                // the 45 nm process
         return "atom";