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| author | Nick Clifton <nickc@redhat.com> | 2010-10-01 12:48:50 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@gcc.gnu.org> | 2010-10-01 12:48:50 +0000 |
| commit | ccaeeafe6979762a81885aa8f5c521a87ecf23ed (patch) | |
| tree | cf182ba85ca7af225b6974defdf77f77f2d0e86b /gcc/doc | |
| parent | 0d228a5255e2e2917cc8807f427221a36a583f4b (diff) | |
| download | gcc-ccaeeafe6979762a81885aa8f5c521a87ecf23ed.zip gcc-ccaeeafe6979762a81885aa8f5c521a87ecf23ed.tar.gz gcc-ccaeeafe6979762a81885aa8f5c521a87ecf23ed.tar.bz2 | |
common.opt: Add -fcombine-stack-adjustments.
* common.opt: Add -fcombine-stack-adjustments.
* opts.c (decode_options): Enable -fcombine-stack-adjustments at
-O1.
* combine-stack-adj.c (gate_handle_stack_adjustments): Check
flag_combine_stack_adjustments.
* doc/invoke.texi: Document the new option.
From-SVN: r164883
Diffstat (limited to 'gcc/doc')
| -rw-r--r-- | gcc/doc/invoke.texi | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index df39e16..057ae7d 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -334,7 +334,8 @@ Objective-C and Objective-C++ Dialects}. -falign-labels[=@var{n}] -falign-loops[=@var{n}] -fassociative-math @gol -fauto-inc-dec -fbranch-probabilities -fbranch-target-load-optimize @gol -fbranch-target-load-optimize2 -fbtr-bb-exclusive -fcaller-saves @gol --fcheck-data-deps -fconserve-stack -fcprop-registers -fcrossjumping @gol +-fcheck-data-deps -fcombine-stack-adjustments -fconserve-stack @gol +-fcprop-registers -fcrossjumping @gol -fcse-follow-jumps -fcse-skip-blocks -fcx-fortran-rules @gol -fcx-limited-range @gol -fdata-sections -fdce -fdce @gol @@ -6618,6 +6619,13 @@ those which have no call-preserved registers to use instead. Enabled at levels @option{-O2}, @option{-O3}, @option{-Os}. +@item -fcombine-stack-adjustments +@opindex fcombine-stack-adjustments +Tracks stack adjustments (pushes and pops) and stack memory references +and then tries to find ways to combine them. + +Enabled by default at @option{-O1} and higher. + @item -fconserve-stack @opindex fconserve-stack Attempt to minimize stack usage. The compiler will attempt to use less |