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Re: [avr-gcc-list] avr-gcc 4.5.1 doing bad reloads using X
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From: |
Georg Lay |
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Subject: |
Re: [avr-gcc-list] avr-gcc 4.5.1 doing bad reloads using X |
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Date: |
Wed, 03 Nov 2010 15:19:16 +0100 |
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User-agent: |
Thunderbird 2.0.0.24 (X11/20100302) |
Weddington, Eric schrieb:
> Thanks for doing this analysis!
hmmm, I think it was too optimistic. Obviously constraint modifier !
does not describe the cost of the reload as a whole resp. it is too
late when IRAt takes this cost into account. That means that the cost
affects the reloaded source/dest reg but not the reload of the address
reg.