2004-04-19 Paolo Bonzini <bonzini@gnu.org>

[pf3gnuchains/gcc-fork.git] / gcc / doc / invoke.texi

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 570e8e7..d204cf6 100644 (file)
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -4342,19 +4342,6 @@ If @var{n} is not specified or is zero, use a machine-dependent default.
 
 Enabled at levels @option{-O2}, @option{-O3}.
 
-@item -frename-registers
-@opindex frename-registers
-Attempt to avoid false dependencies in scheduled code by making use
-of registers left over after register allocation.  This optimization
-will most benefit processors with lots of registers.  Depending on the
-debug information format adopted by the target, however, it can
-make debugging impossible, since variables will no longer stay in
-a ``home register''.
-
-Enabled at levels @option{-O}, @option{-O2}, @option{-O3}, @option{-Os},
-on targets where the default format for debugging information supports
-variable tracking.
-
 @item -fweb
 @opindex fweb
 Constructs webs as commonly used for register allocation purposes and assign
@@ -4575,6 +4562,17 @@ using the knowledge about the value of the denominator.
 
 Enabled with @option{-profile-generate} and @option{-profile-use}.
 
+@item -frename-registers
+@opindex frename-registers
+Attempt to avoid false dependencies in scheduled code by making use
+of registers left over after register allocation.  This optimization
+will most benefit processors with lots of registers.  Depending on the
+debug information format adopted by the target, however, it can
+make debugging impossible, since variables will no longer stay in
+a ``home register''.
+
+Not enabled by default at any level because it has known bugs.
+
 @item -fnew-ra
 @opindex fnew-ra
 Use a graph coloring register allocator.  Currently this option is meant