Is "cml_cont" of CmmCall used in practice?

[Simon Peyton Jones]

Adding Kavon.

It would be good to record the outcome of this discussion in a 'Note' with the cml_cont declaration, explaining what it is for.

Simon

|  -----Original Message-----
|  From: ghc-devs <ghc-devs-bounces at haskell.org> On Behalf Of Ömer Sinan
|  Agacan
|  Sent: 18 March 2018 07:32
|  To: Shao, Cheng <cheng.shao at tweag.io>
|  Cc: ghc-devs <ghc-devs at haskell.org>
|  Subject: Re: Is "cml_cont" of CmmCall used in practice?
|  
|  Hi Shao,
|  
|  Perhaps not in the Cmm output generated for your programs, but it's
|  definitely used in the code generator. See e.g. `lowerSafeForeignCall`
|  and `blockCode` which set the field with `Just`. The former seems to
|  be related with foreign calls so perhaps try compiling a FFI package.
|  `CmmLayoutStack` uses that field for code generation (I don't
|  understand the details yet).
|  
|  Ömer
|  
|  2018-03-18 8:38 GMT+03:00 Shao, Cheng <cheng.shao at tweag.io>:
|  > Hi all,
|  >
|  > Is the "cml_cont" field of the CmmCall variant is really used in
|  > practice? I traversed the output of raw Cmm produced by ghc
|  compiling
|  > the whole base package, but the value of cml_cont is always Nothing.
|  >
|  > Regards,
|  > Shao Cheng
|  >
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