Sophie: ghc-doc-0:6.10.4-1mdv2010.0 i586

ghc-doc-6.10.4-1mdv2010.0.i586.rpm

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>ghc-6.10.4: The GHC API</TD
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>Contents</A
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>Index</A
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>RegSpillClean</FONT
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>Description</TD
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>Clean out unneeded spill/reload instrs
</P
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> Handling of join points
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>B1:                          B2:
    ...                          ...
       RELOAD SLOT(0), %r1          RELOAD SLOT(0), %r1
       ... A ...                    ... B ...
       jump B3                      jump B3
</P
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>B3: ... C ...
                    RELOAD SLOT(0), %r1
                    ...
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>the plan:
	So long as %r1 hasn't been written to in A, B or C then we don't need the
	reload in B3.
</P
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>What we really care about here is that on the entry to B3, %r1 will always
	have the same value that is in SLOT(0) (ie, %r1 is _valid_)
</P
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>This also works if the reloads in B1/B2 were spills instead, because
	spilling %r1 to a slot makes that slot have the same value as %r1.
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>Synopsis</TD
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><A HREF="#v%3AcleanSpills"
>cleanSpills</A
> :: <A HREF="RegLiveness.html#t%3ALiveCmmTop"
>LiveCmmTop</A
> -&gt; <A HREF="RegLiveness.html#t%3ALiveCmmTop"
>LiveCmmTop</A
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>Documentation</TD
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>cleanSpills</B
> :: <A HREF="RegLiveness.html#t%3ALiveCmmTop"
>LiveCmmTop</A
> -&gt; <A HREF="RegLiveness.html#t%3ALiveCmmTop"
>LiveCmmTop</A
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>Clean out unneeded spill/reloads from this top level thing.
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