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Diffstat (limited to 'docs/users_guide/using-optimisation.rst')
| -rw-r--r-- | docs/users_guide/using-optimisation.rst | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/docs/users_guide/using-optimisation.rst b/docs/users_guide/using-optimisation.rst index 4ca47524a7..8ec19cb147 100644 --- a/docs/users_guide/using-optimisation.rst +++ b/docs/users_guide/using-optimisation.rst @@ -214,6 +214,19 @@ by saying ``-fno-wombat``. to their usage sites. It also inlines simple expressions like literals or registers. +.. ghc-flag:: -fcmm-static-pred + :shortdesc: Enable static control flow prediction. Implied by :ghc-flag:`-O`. + :type: dynamic + :reverse: -fno-cmm-static-pred + :category: + + :default: off but enabled with :ghc-flag:`-O`. + + This enables static control flow prediction on the final Cmm + code. If enabled GHC will apply certain heuristics to identify + loops and hot code paths. This information is then used by the + register allocation and code layout passes. + .. ghc-flag:: -fasm-shortcutting :shortdesc: Enable shortcutting on assembly. Implied by :ghc-flag:`-O2`. :type: dynamic |