Re: More aggressive threading causing loop-interchange-9.c regression

2021-09-08 Thread Richard Biener via Gcc
On Wed, Sep 8, 2021 at 8:13 PM Michael Matz wrote: > > Hello, > > [lame answer to self] > > On Wed, 8 Sep 2021, Michael Matz wrote: > > > > > The forward threader guards against this by simply disallowing > > > > threadings that involve different loops. As I see > > > > > > The thread in question

Some questions on hash_set/hash_map traits

2021-09-08 Thread Erick Ochoa via Gcc
Hello, I am refactoring some old code that runs as an IPA_PASS. This code is intended to run at link-time using the LTO framework and so I am always testing it that way. At the moment, I am trying to use hash-maps but having some difficulties. I am adding some patches that will help illustrate alo

Re: More aggressive threading causing loop-interchange-9.c regression

2021-09-08 Thread Michael Matz via Gcc
Hello, [lame answer to self] On Wed, 8 Sep 2021, Michael Matz wrote: > > > The forward threader guards against this by simply disallowing > > > threadings that involve different loops. As I see > > > > The thread in question (5->9->3) is all within the same outer loop, > > though. BTW, the b

Re: More aggressive threading causing loop-interchange-9.c regression

2021-09-08 Thread Michael Matz via Gcc
Hello, On Wed, 8 Sep 2021, Aldy Hernandez wrote: > > The forward threader guards against this by simply disallowing > > threadings that involve different loops. As I see > > The thread in question (5->9->3) is all within the same outer loop, > though. BTW, the backward threader also disallows

Re: More aggressive threading causing loop-interchange-9.c regression

2021-09-08 Thread Aldy Hernandez via Gcc
On 9/8/21 3:49 PM, Richard Biener wrote: On Wed, Sep 8, 2021 at 3:25 PM Aldy Hernandez wrote: It would be helpful to have the patch causing the issue to look at the IL. But as Micha said, there needs to be a perfect loop nest for interchange to work. Richard. Absolutely! I'm attaching th

[RISCV] RISC-V GNU Toolchain Biweekly Sync-up call (Sept 9, 2021)

2021-09-08 Thread 吴伟
Hi all, There is an agenda for tomorrow's meeting. If you have topics to discuss or share, please let me know and I can add them to the agenda. Agenda: 1. Progress of RISC-V subextensions toolchain developing 2. Open Discussion Topic: RISC-V GNU Toolchain Biweekly Sync-up Join Zoom Meeting ht

Re: More aggressive threading causing loop-interchange-9.c regression

2021-09-08 Thread Richard Biener via Gcc
On Wed, Sep 8, 2021 at 3:25 PM Aldy Hernandez wrote: > > > It would be helpful to have the patch causing the issue to look at the IL. > > But as Micha said, there needs to be a perfect loop nest for interchange > > to work. > > > > Richard. > > Absolutely! I'm attaching the reduced testcase, as w

Re: More aggressive threading causing loop-interchange-9.c regression

2021-09-08 Thread Aldy Hernandez via Gcc
It would be helpful to have the patch causing the issue to look at the IL. But as Micha said, there needs to be a perfect loop nest for interchange to work. Richard. Absolutely! I'm attaching the reduced testcase, as well as the patch. The problematic thread shows up in the thread2 dump: Che

Re: More aggressive threading causing loop-interchange-9.c regression

2021-09-08 Thread Richard Biener via Gcc
On Wed, Sep 8, 2021 at 12:44 PM Aldy Hernandez wrote: > > First of all. Thanks so much for this incredibly useful explanation. > It helps a lot. > > I'm still trying to wrap my head around this, so please bear with me. > > On 9/7/21 4:45 PM, Michael Matz wrote: > > Hello, > > > > On Tue, 7 Sep 20

Re: More aggressive threading causing loop-interchange-9.c regression

2021-09-08 Thread Aldy Hernandez via Gcc
First of all. Thanks so much for this incredibly useful explanation. It helps a lot. I'm still trying to wrap my head around this, so please bear with me. On 9/7/21 4:45 PM, Michael Matz wrote: Hello, On Tue, 7 Sep 2021, Aldy Hernandez via Gcc wrote: The regression comes from the simple_re