[PATCH] Disable IPA-SRA for always_inline functions

[Martin Jambor]

Hi,

when dealing with a PR yesterday I have noticed that IPA-SRA was
modifying an always_inline function which is useless work since the
function must then be inlined anyway.  Thus I'd like to propose the
following simple change disabling it in such cases.

Included in a bootstrap and testing on x86_64-linux.  OK for trunk now
or in the next stsge1?

Thanks,

Martin


2014-04-01  Martin Jambor  <mjam...@suse.cz>

        * tree-sra.c (ipa_sra_preliminary_function_checks): Skip
        always_inline functions.

Index: src/gcc/tree-sra.c
===================================================================
--- src.orig/gcc/tree-sra.c
+++ src/gcc/tree-sra.c
@@ -4960,6 +4960,15 @@ ipa_sra_preliminary_function_checks (str
   if (TYPE_ATTRIBUTES (TREE_TYPE (node->decl)))
     return false;
 
+  if (lookup_attribute ("always_inline",
+                       DECL_ATTRIBUTES (node->decl)) != NULL)
+    {
+      if (dump_file)
+       fprintf (dump_file, "Allways inline function will be inlined "
+                "anyway. \n");
+      return false;
+    }
+
   return true;
 }