[Bug c/111153] RISC-V: Incorrect Vector cost model for reduction

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53 --- Comment #8 from GCC Commits --- The master branch has been updated by Pan Li : https://gcc.gnu.org/g:c7ef2189855a8cf12427a778cd5a31d42ddf6260 commit r14-6571-gc7ef2189855a8cf12427a778cd5a31d42ddf6260 Author: Juzhe-Zhong Date: Thu Dec 14

[Bug c/111153] RISC-V: Incorrect Vector cost model for reduction

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53 JuzheZhong changed: What|Removed |Added Status|UNCONFIRMED |RESOLVED Resolution|---

[Bug c/111153] RISC-V: Incorrect Vector cost model for reduction

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53 --- Comment #6 from GCC Commits --- The master branch has been updated by Pan Li : https://gcc.gnu.org/g:5e0f67b84a615ba186ab234a9bc43df0df5a50b6 commit r14-6528-g5e0f67b84a615ba186ab234a9bc43df0df5a50b6 Author: Juzhe-Zhong Date: Thu Dec 14

[Bug c/111153] RISC-V: Incorrect Vector cost model for reduction

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53 --- Comment #5 from CVS Commits --- The master branch has been updated by Pan Li : https://gcc.gnu.org/g:fafd2502c5416fe4f69daf13224ab1efbf256a1c commit r14-4086-gfafd2502c5416fe4f69daf13224ab1efbf256a1c Author: Juzhe-Zhong Date: Sun Sep 17

[Bug c/111153] RISC-V: Incorrect Vector cost model for reduction

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53 --- Comment #4 from Robin Dapp --- Yes, with VLS reduction this will improve. On aarch64 + sve I see loop inside costs: 2 This is similar to our VLS costs. And their loop is indeed short: ld1wz30.s, p7/z, [x0, x2, lsl 2] a

[Bug c/111153] RISC-V: Incorrect Vector cost model for reduction

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53 --- Comment #3 from JuzheZhong --- (In reply to Robin Dapp from comment #2) > With the current trunk we don't spill anymore: > > (VLS) > .L4: > vle32.v v2,0(a5) > vadd.vv v1,v1,v2 > addia5,a5,16 > bne a5,a4,.L4 >

[Bug c/111153] RISC-V: Incorrect Vector cost model for reduction

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53 --- Comment #2 from Robin Dapp --- With the current trunk we don't spill anymore: (VLS) .L4: vle32.v v2,0(a5) vadd.vv v1,v1,v2 addia5,a5,16 bne a5,a4,.L4 Considering just that loop I'd say costing works

[Bug c/111153] RISC-V: Incorrect Vector cost model for reduction

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53 --- Comment #1 from Robin Dapp --- We seem to decide that a slightly more expensive loop (one instruction more) without an epilogue is better than a loop with an epilogue. This looks intentional in the vectorizer cost estimation and is not spec