2008-07-30 Joey Ye <joey.ye@intel.com>

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

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 4c82dc6..9557ba3 100644 (file)
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -2959,15 +2959,9 @@ floating point arguments on the stack.
 @cindex @code{force_align_arg_pointer} attribute
 On the Intel x86, the @code{force_align_arg_pointer} attribute may be
 applied to individual function definitions, generating an alternate
-prologue and epilogue that realigns the runtime stack.  This supports
-mixing legacy codes that run with a 4-byte aligned stack with modern
-codes that keep a 16-byte stack for SSE compatibility.  The alternate
-prologue and epilogue are slower and bigger than the regular ones, and
-the alternate prologue requires a scratch register; this lowers the
-number of registers available if used in conjunction with the
-@code{regparm} attribute.  The @code{force_align_arg_pointer}
-attribute is incompatible with nested functions; this is considered a
-hard error.
+prologue and epilogue that realigns the runtime stack if necessary.
+This supports mixing legacy codes that run with a 4-byte aligned stack
+with modern codes that keep a 16-byte stack for SSE compatibility.
 
 @item resbank
 @cindex @code{resbank} attribute