New flag to control reg-moves generation

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@127223 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 8 insertions, 1 deletions

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index d5974ee195f..5a13c42501b 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -328,7 +328,7 @@ Objective-C and Objective-C++ Dialects}.
 -finline-functions  -finline-functions-called-once @gol
 -finline-limit=@var{n}  -fkeep-inline-functions @gol
 -fkeep-static-consts  -fmerge-constants  -fmerge-all-constants @gol
--fmodulo-sched -fno-branch-count-reg @gol
+-fmodulo-sched -fmodulo-sched-allow-regmoves -fno-branch-count-reg @gol
 -fno-default-inline  -fno-defer-pop -fmove-loop-invariants @gol
 -fno-function-cse  -fno-guess-branch-probability @gol
 -fno-inline  -fno-math-errno  -fno-peephole  -fno-peephole2 @gol
@@ -5265,6 +5265,13 @@ Perform swing modulo scheduling immediately before the first scheduling
 pass.  This pass looks at innermost loops and reorders their
 instructions by overlapping different iterations.
 
+@item -fmodulo-sched-allow-regmoves
+@opindex fmodulo-sched-allow-regmoves
+Perform more aggressive SMS based modulo scheduling with register moves
+allowed.  By setting this flag certain anti-dependences edges will be
+deleted which will trigger the generation of reg-moves based on the
+life-range analysis.
+
 @item -fno-branch-count-reg
 @opindex fno-branch-count-reg
 Do not use ``decrement and branch'' instructions on a count register,