emit-rtl.c (gen_lowpart_common): Handle interpreting integer constants as condition code values.

	* emit-rtl.c (gen_lowpart_common): Handle interpreting integer
	constants as condition code values.

Co-Authored-By: Geoffrey Keating <geoffk@apple.com>
Co-Authored-By: John David Anglin <dave.anglin@nrc-cnrc.gc.ca>

From-SVN: r67309

gcc/ChangeLog

+2003-06-01  Roger Sayle  <roger@eyesopen.com>
+	    John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+	    Geoffrey Keating  <geoffk@apple.com>
+
+	* emit-rtl.c (gen_lowpart_common): Handle interpreting integer
+	constants as condition code values.
+
 2003-06-01  DJ Delorie  <dj@redhat.com>
 
 	* cppmacro.c (warn_of_redefinition): Handle cases where the two

gcc/emit-rtl.c

@@ -1291,6 +1291,12 @@ gen_lowpart_common (mode, x)
 				 mode);
 #endif
     }
+  /* If MODE is a condition code and X is a CONST_INT, the value of X
+     must already have been "recognized" by the back-end, and we can
+     assume that it is valid for this mode.  */
+  else if (GET_MODE_CLASS (mode) == MODE_CC
+	   && GET_CODE (x) == CONST_INT)
+    return x;
 
   /* Otherwise, we can't do this.  */
   return 0;