Does this help?
On Tue, Sep 13, 2016 at 8:32 AM, Andreas Schwab <[email protected]> wrote:
> On Sep 12 2016, Jason Merrill <[email protected]> wrote:
>
>> I'm checking in this patch, which should fix the remaining issues:
>
> Unfortunatly that breaks a few other tests:
>
> FAIL: g++.dg/cpp0x/alignas5.C -std=c++11 (test for excess errors)
> FAIL: g++.dg/cpp0x/alignas5.C -std=c++14 (test for excess errors)
> FAIL: g++.dg/cpp0x/gen-attrs-21.C -std=c++11 (test for excess errors)
> FAIL: g++.dg/cpp0x/gen-attrs-21.C -std=c++14 (test for excess errors)
> FAIL: g++.dg/cpp0x/gen-attrs-51.C -std=c++11 (test for excess errors)
> FAIL: g++.dg/cpp0x/gen-attrs-51.C -std=c++14 (test for excess errors)
> FAIL: g++.dg/cpp0x/gen-attrs-54.C -std=c++11 (test for excess errors)
> FAIL: g++.dg/cpp0x/gen-attrs-54.C -std=c++14 (test for excess errors)
> FAIL: g++.dg/ipa/devirt-33.C (test for excess errors)
> FAIL: g++.dg/lookup/name-clash11.C -std=gnu++11 (test for excess errors)
> FAIL: g++.dg/lookup/name-clash11.C -std=gnu++14 (test for excess errors)
> FAIL: g++.dg/pr67989.C (test for excess errors)
>
> They all fail with "warning: requested alignment %d is larger than 2
> [-Wattributes]".
>
> Andreas.
>
> --
> Andreas Schwab, [email protected]
> GPG Key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
> "And now for something completely different."
commit 113f925a58a37cb8f18cd9c7aeeb4c03f5fc6afe
Author: Jason Merrill <[email protected]>
Date: Tue Sep 13 08:46:06 2016 -0400
* c-common.c (check_cxx_fundamental_alignment_constraints): Use
unsigned HOST_WIDE_INT.
diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
index 9b5e016..e3dc0f5 100644
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -7861,8 +7861,9 @@ check_cxx_fundamental_alignment_constraints (tree node,
int flags)
{
bool alignment_too_large_p = false;
- unsigned requested_alignment = (1U << align_log) * BITS_PER_UNIT;
- unsigned max_align = 0;
+ unsigned HOST_WIDE_INT requested_alignment
+ = (unsigned HOST_WIDE_INT)BITS_PER_UNIT << align_log;
+ unsigned HOST_WIDE_INT max_align = 0;
if ((!(flags & ATTR_FLAG_CXX11) && !warn_cxx_compat)
|| (node == NULL_TREE || node == error_mark_node))
@@ -7910,14 +7911,15 @@ check_cxx_fundamental_alignment_constraints (tree node,
largest alignment the object file can represent, but a type that is
only allocated dynamically could request even larger alignment. So
only limit type alignment to what TYPE_ALIGN can represent. */
- if (requested_alignment > (max_align = 8U << 28))
+ if (requested_alignment > (max_align = (unsigned HOST_WIDE_INT)8 << 28))
alignment_too_large_p = true;
}
if (alignment_too_large_p)
pedwarn (input_location, OPT_Wattributes,
"requested alignment %d is larger than %d",
- requested_alignment / BITS_PER_UNIT, max_align / BITS_PER_UNIT);
+ int(requested_alignment / BITS_PER_UNIT),
+ int(max_align / BITS_PER_UNIT));
return !alignment_too_large_p;
}
