invoke.texi (Option Summary): Add -momit-leaf-frame-pointer (i386 Options): Document...

[gcc.git] / gcc / invoke.texi

diff --git a/gcc/invoke.texi b/gcc/invoke.texi
index 307b03be9d0b450f44ae566b5f9f38ec909fd232..c496458482caf18994daffc9e81af9db62310087 100644 (file)
--- a/gcc/invoke.texi
+++ b/gcc/invoke.texi
@@ -473,7 +473,7 @@ in the following sections.
 -mpreferred-stack-boundary=@var{num} @gol
 -mthreads -mno-align-stringops -minline-all-stringops @gol
 -mpush-args -maccumulate-outgoing-args -m128bit-long-double @gol
--m96bit-long-double -mregparm=@var{num}}
+-m96bit-long-double -mregparm=@var{num} -momit-leaf-frame-pointer}
 
 @emph{HPPA Options}
 @gccoptlist{
@@ -6924,6 +6924,14 @@ By default GCC inlines string operations only when destination is known to be
 aligned at least to 4 byte boundary. This enables more inlining, increase code
 size, but may improve performance of code that depends on fast memcpy, strlen
 and memset for short lengths.
+
+@item -momit-leaf-frame-pointer
+@kindex -momit-leaf-frame-pointer
+Don't keep the frame pointer in a register for leaf functions.  This
+avoids the instructions to save, set up and restore frame pointers and
+makes an extra register available in leaf functions.  The option
+@samp{-fomit-frame-pointer} removes the frame pointer for all functions
+which might make debugging harder.
 @end table
 
 @node HPPA Options