I just figured that we create &TARGET_MEM_REF [base: a_4, offset: 0]
from within IVOPTs. That pessimizes further passes unnecessarily.
Bootstrap and regtest running on x86_64-unknown-linux-gnu.
Richard.
2014-06-18 Richard Biener <rguent...@suse.de>
* tree-ssa-address.c (create_mem_ref_raw): Use proper predicate
to catch all valid MEM_REF pointer operands.
Index: gcc/tree-ssa-address.c
===================================================================
--- gcc/tree-ssa-address.c (revision 211771)
+++ gcc/tree-ssa-address.c (working copy)
@@ -393,7 +393,7 @@ create_mem_ref_raw (tree type, tree alia
??? As IVOPTs does not follow restrictions to where the base
pointer may point to create a MEM_REF only if we know that
base is valid. */
- if ((TREE_CODE (base) == ADDR_EXPR || TREE_CODE (base) == INTEGER_CST)
+ if (is_gimple_mem_ref_addr (base)
&& (!index2 || integer_zerop (index2))
&& (!addr->index || integer_zerop (addr->index)))
return fold_build2 (MEM_REF, type, base, addr->offset);
