Avoid warnings if assertions are off.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81127 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/regengine.inc b/lib/Support/regengine.inc
index f1ba56b..0f27cfd 100644
--- a/lib/Support/regengine.inc
+++ b/lib/Support/regengine.inc
@@ -361,6 +361,7 @@
 			/* did innards match? */
 			if (slow(m, sp, rest, ssub, esub) != NULL) {
 				char *dp = dissect(m, sp, rest, ssub, esub);
+				(void)dp; /* avoid warning if assertions off */
 				assert(dp == rest);
 			} else		/* no */
 				assert(sp == rest);
@@ -400,6 +401,7 @@
 			assert(slow(m, ssp, sep, ssub, esub) == rest);
 			{
 				char *dp = dissect(m, ssp, sep, ssub, esub);
+				(void)dp; /* avoid warning if assertions off */
 				assert(dp == sep);
 			}
 			sp = rest;
@@ -437,6 +439,7 @@
 			}
 			{
 				char *dp = dissect(m, sp, rest, ssub, esub);
+				(void)dp; /* avoid warning if assertions off */
 				assert(dp == rest);
 			}
 			sp = rest;