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| author | dos-reis <gdr@axiomatics.org> | 2010-07-29 08:37:00 +0000 |
|---|---|---|
| committer | dos-reis <gdr@axiomatics.org> | 2010-07-29 08:37:00 +0000 |
| commit | f8232edef433c9bdfa1f072fdd7dafd0fa01c62a (patch) | |
| tree | 30c70cf2875a9da8c046de8adfc23fea0b224a33 /src/interp | |
| parent | 708ad63d818302003bbff2306892007cdc9888cf (diff) | |
| download | open-axiom-f8232edef433c9bdfa1f072fdd7dafd0fa01c62a.tar.gz | |
* interp/c-util.boot (removeToplevelRETURN_-FROM): New.
(transformToBackendCode): Use it to clean function body.
Diffstat (limited to 'src/interp')
| -rw-r--r-- | src/interp/c-util.boot | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/interp/c-util.boot b/src/interp/c-util.boot index d18c4dea..c72da0df 100644 --- a/src/interp/c-util.boot +++ b/src/interp/c-util.boot @@ -1603,6 +1603,16 @@ needsPROG? form == form is ['BLOCK,=nil,:.] => false or/[needsPROG? x for x in form] +++ We are processing the complete `body' of a function definition. +++ If this body is a multiway test, there is no need to have +++ a RETURN-FROM operator in the immediate consequence of a branch. +removeToplevelRETURN_-FROM body == + if body is [['COND,:stmts]] then + for stmt in stmts repeat + stmt is [.,['RETURN_-FROM,.,expr]] => + second(stmt) := expr + body + ++ Generate Lisp code by lowering middle end defining form `x'. ++ x has the strucrure: <name, parms, stmt1, ...> transformToBackendCode: %Form -> %Code @@ -1635,7 +1645,7 @@ transformToBackendCode x == [declareGlobalVariables fluids,:body] lvars ~= nil or needsPROG? body => [["PROG",lvars,["RETURN",:body]]] - body + removeToplevelRETURN_-FROM body -- add reference parameters to the list of special variables. fluids := S_+(backendFluidize second x, $SpecialVars) lastdecl := lastDeclarationNode rest x |