Applied the patch below.
Johann
--
AVR: Clarify some optimization options.
gcc/
* doc/invoke.texi (AVR Optimization Options)
<-maccumulate-args>: Refer to -fdefer-pop.
<-muse-nonzero-bits>: Re-formulate what the option does.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 81bfacfc35d..36b252be387 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -24555,6 +24555,8 @@ Accumulate outgoing function arguments and
acquire/release the needed
stack space for outgoing function arguments once in function
prologue/epilogue. Without this option, outgoing arguments are pushed
before calling a function and popped afterwards.
+See also the @option{-fdefer-pop}
+@ref{Optimize Options,,optimization option}.
Popping the arguments after the function call can be expensive on
AVR so that accumulating the stack space might lead to smaller
@@ -24632,7 +24634,8 @@ This optimization is turned on per default for
@option{-O2} and higher.
@opindex muse-nonzero-bits
@item -muse-nonzero-bits
-Enable some patterns for bit optimizations that depend on specific values.
+Enable optimizations that are only possible when some bits in a
+register are always zero.
This optimization is turned on per default for @option{-O2} and higher.
@end table
