libgo: Define CC_FOR_BUILD in Makefile.

[pf3gnuchains/gcc-fork.git] / gcc / tree-ssa-dce.c

diff --git a/gcc/tree-ssa-dce.c b/gcc/tree-ssa-dce.c
index 6b77876..9597b57 100644 (file)
--- a/gcc/tree-ssa-dce.c
+++ b/gcc/tree-ssa-dce.c
@@ -1,5 +1,5 @@
 /* Dead code elimination pass for the GNU compiler.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+   Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
    Free Software Foundation, Inc.
    Contributed by Ben Elliston <bje@redhat.com>
    and Andrew MacLeod <amacleod@redhat.com>
@@ -316,7 +316,8 @@ mark_stmt_if_obviously_necessary (gimple stmt, bool aggressive)
         easily locate the debug temp bind stmt for a use thereof,
         would could refrain from marking all debug temps here, and
         mark them only if they're used.  */
-      if (gimple_debug_bind_has_value_p (stmt)
+      if (!gimple_debug_bind_p (stmt)
+         || gimple_debug_bind_has_value_p (stmt)
          || TREE_CODE (gimple_debug_bind_get_var (stmt)) != DEBUG_EXPR_DECL)
        mark_stmt_necessary (stmt, false);
       return;
@@ -830,11 +831,14 @@ propagate_necessity (struct edge_list *el)
              if (callee != NULL_TREE
                  && DECL_BUILT_IN_CLASS (callee) == BUILT_IN_NORMAL
                  && (DECL_FUNCTION_CODE (callee) == BUILT_IN_MEMSET
+                     || DECL_FUNCTION_CODE (callee) == BUILT_IN_MEMSET_CHK
                      || DECL_FUNCTION_CODE (callee) == BUILT_IN_MALLOC
+                     || DECL_FUNCTION_CODE (callee) == BUILT_IN_CALLOC
                      || DECL_FUNCTION_CODE (callee) == BUILT_IN_FREE
                      || DECL_FUNCTION_CODE (callee) == BUILT_IN_ALLOCA
                      || DECL_FUNCTION_CODE (callee) == BUILT_IN_STACK_SAVE
-                     || DECL_FUNCTION_CODE (callee) == BUILT_IN_STACK_RESTORE))
+                     || DECL_FUNCTION_CODE (callee) == BUILT_IN_STACK_RESTORE
+                     || DECL_FUNCTION_CODE (callee) == BUILT_IN_ASSUME_ALIGNED))
                continue;
 
              /* Calls implicitly load from memory, their arguments