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| author | Jakub Jelinek <jakub@redhat.com> | 2021-05-07 17:48:37 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2021-05-07 17:48:37 +0200 |
| commit | 170c850e4bd46745e2a5130b5eb09f9fceb98416 (patch) | |
| tree | cc92339a9d553a6a8959bb4753d0af19841ce53e /libcpp/lex.c | |
| parent | 5795ec0edc30e077a9900cf3ca0a04ad8ac5ac97 (diff) | |
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libcpp: Fix up pragma preprocessing [PR100450]
Since the r0-85991-ga25a8f3be322fe0f838947b679f73d6efc2a412c
https://gcc.gnu.org/legacy-ml/gcc-patches/2008-02/msg01329.html
changes, so that we handle macros inside of pragmas that should expand
macros, during preprocessing we print those pragmas token by token,
with CPP_PRAGMA printed as
fputs ("#pragma ", print.outf);
if (space)
fprintf (print.outf, "%s %s", space, name);
else
fprintf (print.outf, "%s", name);
where name is some identifier (so e.g. print
#pragma omp parallel
or
#pragma omp for
etc.). Because it ends in an identifier, we need to handle it like
an identifier (i.e. CPP_NAME) for the decision whether a space needs
to be emitted in between that #pragma whatever or #pragma whatever whatever
and following token, otherwise the attached testcase is preprocessed as
#pragma omp forreduction(+:red)
rather than
#pragma omp for reduction(+:red)
The cpp_avoid_paste function is only called for this purpose.
2021-05-07 Jakub Jelinek <jakub@redhat.com>
PR c/100450
* lex.c (cpp_avoid_paste): Handle token1 CPP_PRAGMA like CPP_NAME.
* c-c++-common/gomp/pr100450.c: New test.
Diffstat (limited to 'libcpp/lex.c')
| -rw-r--r-- | libcpp/lex.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/libcpp/lex.c b/libcpp/lex.c index 9662f1b..b7ce85a 100644 --- a/libcpp/lex.c +++ b/libcpp/lex.c @@ -3719,6 +3719,7 @@ cpp_avoid_paste (cpp_reader *pfile, const cpp_token *token1, case CPP_DEREF: return c == '*'; case CPP_DOT: return c == '.' || c == '%' || b == CPP_NUMBER; case CPP_HASH: return c == '#' || c == '%'; /* Digraph form. */ + case CPP_PRAGMA: case CPP_NAME: return ((b == CPP_NUMBER && name_p (pfile, &token2->val.str)) || b == CPP_NAME |