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Re: Need Help for a new target's assembly code

From: Jim Wilson <wilson at specifixinc dot com>
To: Nitin Jain <nitinj at cse dot iitb dot ac dot in>
Cc: gcc at gcc dot gnu dot org
Date: Thu, 11 Dec 2003 00:04:27 -0800
Subject: Re: Need Help for a new target's assembly code
References: <Pine.GSO.4.40.0312111035410.12125-100000@chandra.cse.iitb.ac.in>

Nitin Jain wrote:

My problem is that why there is a call to "__cmpsi2" while there is no
such thing in my .md file.

cmpsi2 is a libgcc helper routine. It comes from libgcc1 which is usually implemented by target dependent assembler code, if needed.

However, you obviously want your compare opcode instead of a libcall. You should debug the cc1 executable to figure out what the problem is. There are a number of strategies here. You could set a breakpoint in expand_expr, and then step through it to see what RTL is generated. You could put a breakpoint in make_insn_raw conditional on the insn number of the libcall, and then go up stack frames to try to figure out why you got there. -- Jim Wilson, GNU Tools Support, http://www.SpecifixInc.com

References:
- Need Help for a new target's assembly code
  - From: Nitin Jain

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