[PATCH] Handle target specific memory models in C frontend

[Andi Kleen]

From: Andi Kleen <a...@linux.intel.com>

get_atomic_generic_size would error out for
__atomic_store(...,__ATOMIC_HLE_RELEASE)

Just mask it out. All the memory orders are checked completely
in builtins.c anyways.

I'm not sure what that check is for, it could be removed in theory.

Passed bootstrap and test suite on x86-64

gcc/c-family/:
2012-11-09  Andi Kleen  <a...@linux.intel.com>

        PR55139
        * c-common.c (get_atomic_generic_size): Mask with
        MEMMODEL_MASK
---
 gcc/c-family/c-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
index c3a6465..7828d21 100644
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -10097,7 +10097,7 @@ get_atomic_generic_size (location_t loc, tree function, 
VEC(tree,gc) *params)
       if (TREE_CODE (p) == INTEGER_CST)
         {
          int i = tree_low_cst (p, 1);
-         if (i < 0 || i >= MEMMODEL_LAST)
+         if (i < 0 || (i & MEMMODEL_MASK) >= MEMMODEL_LAST)
            {
              warning_at (loc, OPT_Winvalid_memory_model,
                          "invalid memory model argument %d of %qE", x + 1,
-- 
1.7.11.5