Re: Basic frontend question about layout

> So for an example, Ada layouts the records themselves and some times > has a different order of the fields than the layouted offsets. The Ada compiler uses stor-layout.c by default, like all the other compilers. It does its own layout only when it has nothing to do, i.e. when the user has speci

re: How to deal with unrecognizable RTL code

Hi: >> 1) does your machine use cc0? No. In my RISC chip, there is a status register existed, like ARM. But I now I didn't write any code to support it, as well as absent cc0 register. >> 2) what pass is producing those subregs? This is really puzzled me. I just wrote the PROMOTE_MODE like MIP

Re: How to deal with unrecognizable RTL code

daniel.tian wrote: >>> 2) what pass is producing those subregs? > This is really puzzled me. I just wrote the PROMOTE_MODE like MIPS. > Any advice? Turn on the RTL dump files and see where the subregs first appear? My guess would be reload, but let's find out. cheers, DaveK

Re: How to deal with unrecognizable RTL code

Dave Korn wrote: > daniel.tian wrote: > 2) what pass is producing those subregs? >> This is really puzzled me. I just wrote the PROMOTE_MODE like MIPS. > >> Any advice? > > Turn on the RTL dump files and see where the subregs first appear? Yes, that's waht I meant. Paolo

Re: How to deal with unrecognizable RTL code

Paolo Bonzini wrote: > Dave Korn wrote: >> daniel.tian wrote: >> > 2) what pass is producing those subregs? >>> This is really puzzled me. I just wrote the PROMOTE_MODE like MIPS. >>> Any advice? >> Turn on the RTL dump files and see where the subregs first appear? > > Yes, that's waht I m

Re: How to deal with unrecognizable RTL code

Hi Dove: > The docs for PROMOTE_MODE suggest using `word_mode'; it may be that on mips, > Pmode and word_mode are the same, but they aren't on your machine? Yes. I think the Pmode and word_mode is the same as MIPS. So I copy the code in mips. I just wanna do the operations in WORD mode, and remov

Re: plugins directory?

2009/6/22 Richard Guenther : > On the contrary.  If we put in place such a mechanism we have > to maintain it forever.  It is hard to tell what is the correct solution > without distributors facing the problem (there are no existing > plugins that can be packaged or are packaged now). > > So, let'

Re: Question about dead_or_predicable

On 06/23/2009 03:27 PM, Steven Bosscher wrote: Hi, I have a question about ifcvt.c:dead_or_predicable. This function is pretty complicated and it's not really clear to me what it is doing. But I'll have to understand what is going on because there is a bug in this function that I would like to

Any ideas how to get the IRA to choose one subclass of registers over another in the same cover class?

I'm looking at a problem with the gcc 4.4.0 port I'm supporting where the architecture has separate address and data registers. In order to get good code generation we need a single cover class to cover both the data and address register classes as moving between them is no more expensive than