i386: Fix unprotected REGNO in aeswidekl_operation

I hit an ICE in aeswidekl_operation while testing the late-combine
pass on x86.  The predicate tested REGNO without first testing REG_P.

gcc/
	* config/i386/predicates.md (aeswidekl_operation): Protect
	REGNO check with REG_P.

diff --git a/gcc/config/i386/predicates.md b/gcc/config/i386/predicates.md
index ef49efdbde580eb8dc6d530e3e5443c1dfbc9643..e3d55f0c502223b4b56d7629459883c0ae8c69da 100644 (file)
--- a/gcc/config/i386/predicates.md
+++ b/gcc/config/i386/predicates.md
@@ -2260,6 +2260,7 @@
          || GET_CODE (SET_SRC (elt)) != UNSPEC_VOLATILE
          || GET_MODE (SET_SRC (elt)) != V2DImode
          || XVECLEN (SET_SRC (elt), 0) != 1
+         || !REG_P (XVECEXP (SET_SRC (elt), 0, 0))
          || REGNO (XVECEXP (SET_SRC (elt), 0, 0)) != GET_SSE_REGNO (i))
        return false;
     }