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| author | Dominik Vogt <vogt@linux.vnet.ibm.com> | 2016-04-29 09:20:06 +0000 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@gcc.gnu.org> | 2016-04-29 09:20:06 +0000 |
| commit | 509063ebd1859c83df189ac0df52ada49c75ba31 (patch) | |
| tree | 7a4eb6e962868b8905da08956e19636914dca987 | |
| parent | 83745c0ddb708f90961d0b217a4f0cd5e80cd8c7 (diff) | |
| download | gcc-509063ebd1859c83df189ac0df52ada49c75ba31.zip gcc-509063ebd1859c83df189ac0df52ada49c75ba31.tar.gz gcc-509063ebd1859c83df189ac0df52ada49c75ba31.tar.bz2 | |
PR/69089: C++-11: Ingore "alignas(0)".
gcc/c-family/ChangeLog:
2016-04-29 Dominik Vogt <vogt@linux.vnet.ibm.com>
PR/69089
* c-common.c (handle_aligned_attribute): Allow 0 as an argument to the
"aligned" attribute.
gcc/testsuite/ChangeLog:
2016-04-29 Dominik Vogt <vogt@linux.vnet.ibm.com>
PR/69089
* g++.dg/cpp0x/alignas6.C: New test.
From-SVN: r235629
| -rw-r--r-- | gcc/c-family/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/c-family/c-common.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/cpp0x/alignas6.C | 29 |
4 files changed, 41 insertions, 1 deletions
diff --git a/gcc/c-family/ChangeLog b/gcc/c-family/ChangeLog index 9e1695e..f70dc0e 100644 --- a/gcc/c-family/ChangeLog +++ b/gcc/c-family/ChangeLog @@ -1,3 +1,9 @@ +2016-04-29 Dominik Vogt <vogt@linux.vnet.ibm.com> + + PR/69089 + * c-common.c (handle_aligned_attribute): Allow 0 as an argument to the + "aligned" attribute. + 2016-04-28 Jason Merrill <jason@redhat.com> * c-lex.c (c_common_has_attribute): Handle nodiscard. diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c index c086dee..b221979 100644 --- a/gcc/c-family/c-common.c +++ b/gcc/c-family/c-common.c @@ -7815,7 +7815,7 @@ handle_aligned_attribute (tree *node, tree ARG_UNUSED (name), tree args, else if (TYPE_P (*node)) type = node, is_type = 1; - if ((i = check_user_alignment (align_expr, false)) == -1 + if ((i = check_user_alignment (align_expr, true)) == -1 || !check_cxx_fundamental_alignment_constraints (*node, i, flags)) *no_add_attrs = true; else if (is_type) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 020b08e..7dfa23d 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,10 @@ 2016-04-29 Dominik Vogt <vogt@linux.vnet.ibm.com> + PR/69089 + * g++.dg/cpp0x/alignas6.C: New test. + +2016-04-29 Dominik Vogt <vogt@linux.vnet.ibm.com> + * gcc/testsuite/gcc.dg/cpp/mac-dir-2.c: Remove pointless duplicate dg-do. * gcc/testsuite/gcc.dg/pr27003.c: Likewise. diff --git a/gcc/testsuite/g++.dg/cpp0x/alignas6.C b/gcc/testsuite/g++.dg/cpp0x/alignas6.C new file mode 100644 index 0000000..f3252a9 --- /dev/null +++ b/gcc/testsuite/g++.dg/cpp0x/alignas6.C @@ -0,0 +1,29 @@ +// PR c++/69089 +// { dg-do compile { target c++11 } } +// { dg-options "-Wno-attributes" } + +alignas (0) int valid1; +alignas (1 - 1) int valid2; +struct Tvalid +{ + alignas (0) int i; + alignas (2 * 0) int j; +}; + +alignas (-1) int invalid1; /* { dg-error "not a positive power of 2" } */ +alignas (1 - 2) int invalid2; /* { dg-error "not a positive power of 2" } */ +struct Tinvalid +{ + alignas (-1) int i; /* { dg-error "not a positive power of 2" } */ + alignas (2 * 0 - 1) int j; /* { dg-error "not a positive power of 2" } */ +}; + +template <int N> struct TNvalid1 { alignas (N) int i; }; +TNvalid1<0> SNvalid1; +template <int N> struct TNvalid2 { alignas (N) int i; }; +TNvalid2<1 - 1> SNvalid2; + +template <int N> struct TNinvalid1 { alignas (N) int i; }; /* { dg-error "not a positive power of 2" } */ +TNinvalid1<-1> SNinvalid1; +template <int N> struct TNinvalid2 { alignas (N) int i; }; /* { dg-error "not a positive power of 2" } */ +TNinvalid2<1 - 2> SNinvalid2; |