aarch64: Fix valid_src_p for use of uninitialized value

2020-04-15  Andrea Corallo  <andrea.corallo@arm.com>

	* config/aarch64/falkor-tag-collision-avoidance.c
	(valid_src_p): Check for aarch64_address_info type before
	accessing base field.

gcc/ChangeLog

+2020-04-15  Andrea Corallo  <andrea.corallo@arm.com>
+
+	* config/aarch64/falkor-tag-collision-avoidance.c
+	(valid_src_p): Check for aarch64_address_info type before
+	accessing base field.
+
 2020-04-15  Andre Vieira  <andre.simoesdiasvieira@arm.com>
 
 	* config/arm/mve.md (mve_vec_duplicate<mode>): New pattern.

gcc/config/aarch64/falkor-tag-collision-avoidance.c

@@ -538,7 +538,11 @@ valid_src_p (rtx src, rtx_insn *insn, struct loop *loop, bool *pre_post,
   if (!aarch64_classify_address (&addr, XEXP (x, 0), mode, true))
     return false;
 
-  if (!REG_P (addr.base))
+  if (addr.type != ADDRESS_REG_IMM
+      && addr.type != ADDRESS_REG_WB
+      && addr.type != ADDRESS_REG_REG
+      && addr.type != ADDRESS_REG_UXTW
+      && addr.type != ADDRESS_REG_SXTW)
     return false;
 
   unsigned regno = REGNO (addr.base);