X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fcmm%2Fcmm-notes;h=a83a78109715eabfe233ee9d875ad3da38103e1f;hb=b06d623b2e367a572de5daf06d6a0b12c2740471;hp=2fab86fd6decefb9a740dcf5cb3ba8ba05eb24aa;hpb=545cdeb52fc4feea3fa9668706e05ad75041f8b0;p=ghc-hetmet.git

diff --git a/compiler/cmm/cmm-notes b/compiler/cmm/cmm-notes
index 2fab86f..a83a781 100644
--- a/compiler/cmm/cmm-notes
+++ b/compiler/cmm/cmm-notes
@@ -2,6 +2,28 @@ Notes on new codegen (Sept 09)
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 Things to do:
+
+
+ - All dataflow analyses are in the FuelMonad, even though they
+   are guarnteed to consume no fuel.  This seems silly
+
+ - CmmContFlowOpt.runCmmContFlowOptZs is not called!
+ - Why is runCmmOpts called from HscMain?  Seems too "high up".
+   In fact HscMain calls (runCmmOpts cmmCfgOptsZ) which is what
+   runCmmContFlowOptZs does.  Tidy up!
+
+
+ - AsmCodeGen has a generic Cmm optimiser; move this into new pipeline
+
+ - AsmCodeGen has post-native-cg branch elimiator (shortCutBranches);
+   we ultimately want to share this with the Cmm branch eliminator.
+
+ - At the moment, references to global registers like Hp are "lowered" 
+   late (in AsmCodeGen.fixAssignTop and cmmToCmm). We should do this
+   early, in the new native codegen, much in the way that we lower 
+   calling conventions.  Might need to be a bit sophisticated about
+   aliasing.
+
  - Refactor Cmm so that it contains only shared stuff
    Add a module MoribundCmm which contains stuff from
    Cmm for old code gen path