From: Adrian Straetling <straetling@de.ibm.com>
Date: Thu, 7 Jul 2005 10:25:37 +0000 (+0000)
Subject: s390.c: (optimization_options): Enable TARGET_MVCLE at -Os.
X-Git-Tag: misc/cutover-cvs2svn~1874
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8daf098e468d2943bba4bd4617f5e56e6529a69d;p=thirdparty%2Fgcc.git

s390.c: (optimization_options): Enable TARGET_MVCLE at -Os.

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".

From-SVN: r101704
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c54bf1b254b1..f6cee36729b8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,10 @@
+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
diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index c5785337db36..07022a2a4631 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 ac27e03417d4..22bbb7959a97 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 f1ce356d0d5f..a36f17945b0c 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