Re: Clobber REG_CC only for some constraint alternatives?

Pip Cet writes: > On Sun, Aug 16, 2020 at 12:50 AM Segher Boessenkool > wrote: >> On Sat, Aug 15, 2020 at 10:18:27AM +, Pip Cet wrote: >> > > > What I'm currently doing is this: >> > > > >> > > > (define_split >> > > > [(set (match_operand 0 "nonimmediate_operand") >> > > > (match_ope

Re: Clobber REG_CC only for some constraint alternatives?

On Mon, Aug 17, 2020 at 7:31 AM Senthil Kumar Selvaraj wrote: > > (define_split > > [(parallel [(set (match_operand:ALL1 0 "nonimmediate_operand") > > (match_operand:ALL1 1 "nox_general_operand")) > > (clobber (reg:CC REG_CC))])] > > "reload_completed && REG_P (operands[

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Hello, I'm looking to understand better the points-to analysis (IPA-PTA) and the alias analysis (build_alias). How is the information produced by IPA-PTA consumed? Are alias sets in build_alias computed by the intersections of the points_to_set(s) (computed by IPA-PTA)? My intuition tells

Re: Peephole optimisation: isWhitespace()

"Nathan Sidwell" > On 8/16/20 9:54 AM, Stefan Kanthak wrote: >> "Nathan Sidwell" wrote: [...] >>> Have you benchmarked it? >> >> Of course! Did you? [...] > you seem very angry about being asked for data. As much as you hallucinated about CMOV or processors not speculating beyond SETNZ? >

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Re: Peephole optimisation: isWhitespace()

On Freitag, 14. August 2020 18:43:12 CEST Stefan Kanthak wrote: > Hi @ll, > > in his ACM queue article , > Matt Godbolt used the function > > | bool isWhitespace(char c) > | { > | > | return c == ' ' > | > | || c == '\r' > | || c

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Re: Clobber REG_CC only for some constraint alternatives?

On Fri, 2020-08-14 at 16:46 +0530, Senthil Kumar Selvaraj wrote: > Hi, > > I'm working on porting AVR to MODE_CC, and there are quite a few > patterns that clobber the condition code reg only for certain > constraint alternatives. For e.g., Yea. H8 has the same issue. It's worth noting tha

Re: Peephole optimisation: isWhitespace()

"Allan Sandfeld Jensen" wrote: > On Freitag, 14. August 2020 18:43:12 CEST Stefan Kanthak wrote: >> Hi @ll, >> >> in his ACM queue article , >> Matt Godbolt used the function >> >> | bool isWhitespace(char c) >> | { >> | >> | return c == ' ' >>

Re: Clobber REG_CC only for some constraint alternatives?

Hi! On Sun, Aug 16, 2020 at 06:28:44PM +, Pip Cet wrote: > > > IIUC, the idea is that references to REG_CC, except for clobbers, are > > > only introduced in the post-reload split pass, so it cannot be live > > > before our define_split runs. Does that make sense? > > > > Yes, it does. It has

Re: Silly question about pass numbers

Hi, On Tue, Aug 11 2020, Gary Oblock via Gcc wrote: > For these two dump files: > > exe.ltrans0.ltrans.074i.cp > > and > > exe.ltrans0.ltrans.087i.structure-reorg > > doesn't the ".074i." mean that this dump was created > before the ".087i." dump? > > If so then why does the ".074i." show GIMPLE t

Re: Why am I seeing free.2 instead of free in exe.ltrans0.ltrans.s??

Hi, On Tue, Aug 11 2020, Gary Oblock via Gcc wrote: > Note, I'm getting close to getting my part of the structure reorganization > optimization minimally functional (my question about value range propagation > remains open since I re-enabled a couple of optimizations to bypass it.) > Therefore t

Re: Clobber REG_CC only for some constraint alternatives?

Pip Cet writes: > On Mon, Aug 17, 2020 at 7:31 AM Senthil Kumar Selvaraj > wrote: >> > (define_split >> > [(parallel [(set (match_operand:ALL1 0 "nonimmediate_operand") >> > (match_operand:ALL1 1 "nox_general_operand")) >> > (clobber (reg:CC REG_CC))])] >> > "reload_c