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Diffstat (limited to 'docs/users_guide/using-optimisation.rst')
| -rw-r--r-- | docs/users_guide/using-optimisation.rst | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/docs/users_guide/using-optimisation.rst b/docs/users_guide/using-optimisation.rst index ab49f08ade..2db1455186 100644 --- a/docs/users_guide/using-optimisation.rst +++ b/docs/users_guide/using-optimisation.rst @@ -225,6 +225,17 @@ by saying ``-fno-wombat``. to their usage sites. It also inlines simple expressions like literals or registers. +.. ghc-flag:: -fcmm-sink-alias + :shortdesc: Enable more complex aliasing analysis to improve the sinking pass. Implied by :ghc-flag:`-O2`. + :type: dynamic + :reverse: -fno-cmm-sink + :category: + + :default: off but enabled with :ghc-flag:`-O2`. + + This allows us to remove more intermediate variables in the Cmm pass. + For some programs this can avoid excessive spilling. + .. ghc-flag:: -fcmm-static-pred :shortdesc: Enable static control flow prediction. Implied by :ghc-flag:`-O`. :type: dynamic |