re PR tree-optimization/51118 (ICE: tree check: expected tree that contains…

re PR tree-optimization/51118 (ICE: tree check: expected tree that contains ‘typed’ structure, have ‘block’ in fold_checksum_tree, at fold-const.c:14160)

	PR tree-optimization/51118
	* fold-const.c (fold_checksum_tree): Check for TS_TYPED structure
	before using TREE_TYPE accessor on expr.

From-SVN: r181468

gcc/ChangeLog

+2011-11-18  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR tree-optimization/51118
+	* fold-const.c (fold_checksum_tree): Check for TS_TYPED structure
+	before using TREE_TYPE accessor on expr.
+
 2011-11-17  Jan Hubicka  <jh@suse.cz>
 
 	PR bootstrap/51134
 	* i386.c (atom_cost): Fix 32bit memset description.
-	(expand_set_or_movmem_via_loop_with_iter): Output proper bounds check for epilogue loops.
-	(expand_movmem_epilogue): Handle epilogues up to size 15 w/o producing byte loop.
-	(decide_alg): sse_loop is not useable wthen SSE2 is disabled; when not optimizing always
-	use rep movsb or lincall; do not produce word sized loops when optimizing memset for
-	size (to avoid need for large constants).
-	(ix86_expand_movmem): Get into sync with ix86_expand_setmem; choose unroll factors
-	better; always do 128bit moves when producing SSE loops; do not produce loopy epilogue
-	when size is too small.
-	(promote_duplicated_reg_to_size): Do not look into desired alignments when
-	doing vector expansion.
-	(ix86_expand_setmem): Track better when promoted value is available; choose unroll factors
-	more sanely.; output loopy epilogue only when needed.
+	(expand_set_or_movmem_via_loop_with_iter): Output proper bounds check
+	for epilogue loops.
+	(expand_movmem_epilogue): Handle epilogues up to size 15 w/o producing
+	byte loop.
+	(decide_alg): sse_loop is not useable wthen SSE2 is disabled;
+	when not optimizing always use rep movsb or lincall; do not produce
+	word sized loops when optimizing memset for size (to avoid need
+	for large constants).
+	(ix86_expand_movmem): Get into sync with ix86_expand_setmem;
+	choose unroll factors better; always do 128bit moves when producing
+	SSE loops; do not produce loopy epilogue when size is too small.
+	(promote_duplicated_reg_to_size): Do not look into desired alignments
+	when doing vector expansion.
+	(ix86_expand_setmem): Track better when promoted value is available;
+	choose unroll factors more sanely. Output loopy epilogue only
+	when needed.
 
 2011-11-17  Steve Ellcey  <sje@cup.hp.com>
 
@@ -28,7 +38,7 @@
 
 2011-11-17  Andrew MacLeod  <amacleod@redhat.com>
 
-	* builtins.c (expand_builtin): Remove 4th parameter representing 
+	* builtins.c (expand_builtin): Remove 4th parameter representing
 	weak/strong mode when __atomic_compare_exchange becomes a library call.
 
 2011-11-17  Richard Henderson  <rth@redhat.com>

gcc/fold-const.c

@@ -14157,7 +14157,8 @@ fold_checksum_tree (const_tree expr, struct md5_ctx *ctx, htab_t ht)
 	}
     }
   md5_process_bytes (expr, tree_size (expr), ctx);
-  fold_checksum_tree (TREE_TYPE (expr), ctx, ht);
+  if (CODE_CONTAINS_STRUCT (code, TS_TYPED))
+    fold_checksum_tree (TREE_TYPE (expr), ctx, ht);
   if (TREE_CODE_CLASS (code) != tcc_type
       && TREE_CODE_CLASS (code) != tcc_declaration
       && code != TREE_LIST