#7518: Instruction list length in bco->instrs redundant
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Reporter: nomeata | Owner: simonmar
Type: task | Status: new
Priority: normal | Milestone:
Component: Runtime System | Version: 7.6.1
Keywords: | Os: Unknown/Multiple
Architecture: Unknown/Multiple | Failure: None/Unknown
Difficulty: Unknown | Testcase:
Blockedby: | Blocking:
Related: |
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Changes (by nomeata):
* status: infoneeded => new
Comment:
Certainly:
Here, the first element of the instruction list is used to find
{{{nbcd}}}:
http://hackage.haskell.org/trac/ghc/browser/rts/Disassembler.c#L276
The interpreter ignores the value (unless debugging is on):
http://hackage.haskell.org/trac/ghc/browser/rts/Interpreter.c#L789
And here, in assembleBCO, the number of instruction is prepended to the
list of instructions:
http://hackage.haskell.org/trac/ghc/browser/compiler/ghci/ByteCodeAsm.lhs#L156
The assertion in line 161 supports the observation that the information is
duplicated and the size of the ByteArray is correct.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7518#comment:3>
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