diff options
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/config/s390/s390.c | 4 | ||||
| -rw-r--r-- | gcc/config/s390/s390.opt | 2 | ||||
| -rw-r--r-- | gcc/doc/invoke.texi | 3 |
4 files changed, 14 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c54bf1b..f6cee36 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,4 +1,11 @@ 2005-07-07 Adrian Straetling <straetling@de.ibm.com> + + * config/s390/s390.c: (optimization_options): Enable + TARGET_MVCLE at -Os. + * doc/invoke.texi: Document changes in default behaviour. + * config/s390/s390.opt: ("mvcle"): Fix typo: is "mmvcle". + +2005-07-07 Adrian Straetling <straetling@de.ibm.com> * expr.c: (set_storage_via_setmem): Convert opchar to mode defined by back-end. diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c index c578533..07022a2 100644 --- a/gcc/config/s390/s390.c +++ b/gcc/config/s390/s390.c @@ -1107,6 +1107,10 @@ optimization_options (int level ATTRIBUTE_UNUSED, int size ATTRIBUTE_UNUSED) /* By default, always emit DWARF-2 unwind info. This allows debugging without maintaining a stack frame back-chain. */ flag_asynchronous_unwind_tables = 1; + + /* Use MVCLE instructions to decrease code size if requested. */ + if (size != 0) + target_flags |= MASK_MVCLE; } /* Return true if ARG is the name of a processor. Set *TYPE and *FLAGS diff --git a/gcc/config/s390/s390.opt b/gcc/config/s390/s390.opt index ac27e03..22bbb79 100644 --- a/gcc/config/s390/s390.opt +++ b/gcc/config/s390/s390.opt @@ -79,7 +79,7 @@ mtune= Target RejectNegative Joined Schedule code for given CPU -mvcle +mmvcle Target Report Mask(MVCLE) mvcle use diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index f1ce356..a36f179 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -11433,7 +11433,8 @@ to the GNU/Linux for zSeries ABI, the default is @option{-mzarch}. @opindex mno-mvcle Generate (or do not generate) code using the @code{mvcle} instruction to perform block moves. When @option{-mno-mvcle} is specified, -use a @code{mvc} loop instead. This is the default. +use a @code{mvc} loop instead. This is the default unless optimizing for +size. @item -mdebug @itemx -mno-debug |