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Re: More methods of reducing the register pressure
- From: Vladimir Makarov <vmakarov at redhat dot com>
- To: Jeff Law <law at redhat dot com>, Ajit Kumar Agarwal <ajit dot kumar dot agarwal at xilinx dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
- Cc: Vinod Kathail <vinodk at xilinx dot com>, Shail Aditya Gupta <shailadi at xilinx dot com>, Vidhumouli Hunsigida <vidhum at xilinx dot com>, Nagaraju Mekala <nmekala at xilinx dot com>
- Date: Sun, 19 Apr 2015 15:33:35 -0400
- Subject: Re: More methods of reducing the register pressure
- Authentication-results: sourceware.org; auth=none
- References: <5796c43e-1add-48f1-9b1e-63f373eef93f at BL2FFO11OLC007 dot protection dot gbl> <5533E1AF dot 30107 at redhat dot com>
On 19/04/15 01:11 PM, Jeff Law wrote:
Right, Jeff. Results of using GVN for building conflict graph was
described in article:
On 04/19/2015 09:28 AM, Ajit Kumar Agarwal wrote:
I believe Vlad looked at this 10+ years ago and it was of marginal/no
To reduce the register pressure, I am proposing the following methods
of reducing the registers.
1. Assigning same registers or sharing same register for the logical
registers having the same value.
To determine the logical registers having the same value is the real
challenge. Is there is any way in
GCC to determine the logical registers having the same value?