that is great, I think this is what I need. thanks a lot
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From: "Ian Lance Taylor" <iant@xxxxxxxxxx>
Sent: Tuesday, December 22, 2009 10:34 AM
To: "Muhammed Fawzy" <mfawzymkh@xxxxxxxxxxx>
Cc: <gcc-help@xxxxxxxxxxx>
Subject: Re: Code Gen Plugins
"Muhammed Fawzy" <mfawzymkh@xxxxxxxxxxx> writes:
That is great!, but is it possible that the plugin uses the same gcc
backend to emit the code, and only alter **part** of the instruction
stream?
I want to utilize the existing code, and only make a small change in
code generation.
Yes. gcc generates code via a series of passes. A plugin can insert
a new pass. That pass can adjust the instruction stream and pass it
on to future passes.
Ian
--------------------------------------------------
From: "Ian Lance Taylor" <iant@xxxxxxxxxx>
Sent: Tuesday, December 22, 2009 7:53 AM
To: "Muhammed Fawzy" <mfawzymkh@xxxxxxxxxxx>
Cc: <gcc-help@xxxxxxxxxxx>
Subject: Re: Code Gen Plugins
"Muhammed Fawzy" <mfawzymkh@xxxxxxxxxxx> writes:
I would like to know if it is possible with GCC Plugins to write a
code gen plugin to modify certain things.
What I want to achieve is to use the gcc backend, but only change the
way callsites are generated, so the plugin should fallback to use
gcc, and only works when gcc tries to emit code to call functions..
is this something possible with gcc?
If I understand you correctly, then the answer is yes. A plugin can
insert new compilation passes which can manipulate the instruction
steam however you like.
Ian
