#7518: Instruction list length in bco->instrs redundand
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Reporter: nomeata | Owner:
Type: task | Status: new
Priority: normal | Component: Runtime System
Version: 7.6.1 | Keywords:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
Failure: None/Unknown | Blockedby:
Blocking: | Related:
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While reading through the BCO-related code I notice that in the first word
of the instruction list of a BCO (bco->instrs->payload[0]), the length of
the list (as the multiple of 16-bit-words) is stored. This is used in
debugging code, e.g. in the disassembler.
However as far as I can tell this is duplicate information:
bco->instrs->bytes already contains this information (as multiple of
bytes).
Maybe the instruction list was not a proper StgArrWords object before and
this hack was required? If that is the case, I guess it can be removed
now, saving a neglectable amount of memory and cleaning the code a bit.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7518>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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