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| author | Neil Booth <neilb@earthling.net> | 2000-10-29 11:37:18 +0000 |
|---|---|---|
| committer | Neil Booth <neil@gcc.gnu.org> | 2000-10-29 11:37:18 +0000 |
| commit | 44ed91a1d664478bb2f6f2e277988908ce3675a5 (patch) | |
| tree | c48aad594f9cc3ca2781664e65c553c6fb3277cb | |
| parent | 3542203b30a788180f69c3298227c97eeefec03d (diff) | |
| download | gcc-44ed91a1d664478bb2f6f2e277988908ce3675a5.zip gcc-44ed91a1d664478bb2f6f2e277988908ce3675a5.tar.gz gcc-44ed91a1d664478bb2f6f2e277988908ce3675a5.tar.bz2 | |
cppmacro.c (_cpp_create_definition): Optimize the case of a macro defined to itself.
* cppmacro.c (_cpp_create_definition): Optimize the case of
a macro defined to itself.
From-SVN: r37123
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/cppmacro.c | 6 |
2 files changed, 10 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 2172a8e..af21000 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2000-10-29 Neil Booth <neilb@earthling.net> + * cppmacro.c (_cpp_create_definition): Optimize the case of + a macro defined to itself. + +2000-10-29 Neil Booth <neilb@earthling.net> + * cpplex.c (save_comment): Don't store new lines in C++ comments. 2000-10-29 Michael Hayes <mhayes@redhat.com> diff --git a/gcc/cppmacro.c b/gcc/cppmacro.c index 58d3020..35e66f4 100644 --- a/gcc/cppmacro.c +++ b/gcc/cppmacro.c @@ -1403,7 +1403,6 @@ _cpp_create_definition (pfile, node) macro->paramc = 0; macro->fun_like = 0; macro->var_args = 0; - macro->disabled = 0; macro->count = 0; macro->expansion = (cpp_token *) POOL_FRONT (&pfile->macro_pool); @@ -1485,6 +1484,11 @@ _cpp_create_definition (pfile, node) /* Clear the whitespace flag from the leading token. */ macro->expansion[0].flags &= ~PREV_WHITE; + /* Implement the macro-defined-to-itself optimisation. */ + macro->disabled = (macro->count == 1 && !macro->fun_like + && macro->expansion[0].type == CPP_NAME + && macro->expansion[0].val.node == node); + /* Commit the memory. */ POOL_COMMIT (&pfile->macro_pool, macro->count * sizeof (cpp_token)); |