Re: [PATCH] RISC-V: fix const interleaved stepped vector with a scalar pattern

[Jeff Law]

On 10/29/24 6:11 PM, Vineet Gupta wrote:

When bisecting for ICE in PR/117353, commit 771256bcb9dd ("RISC-V: Emit costs 
for
bool and stepped const vectors") uncovered yet another latent issue (first 
noted [1])

   [1] https://github.com/patrick-rivos/gcc-postcommit-ci/issues/1625

This patch fixes some of the fortran regressions from that report.

Fixes 71a5ac6703d1 ("RISC-V: Support interleave vector with different step 
sequence")

rv64imafdcv_zvl256b_zba_zbb_zbs_zicond/lp64d/medlow
                             | # of unexpected case / # of unique unexpected 
case
                             |          gcc |          g++ |     gfortran |
                             |  392 /   108 |    7 /     3 |   91 /    24 |
                             |  392 /   108 |    7 /     3 |   67 /    12 |

gcc/ChangeLog:

        * config/riscv/riscv-v.cc (expand_const_vector): Use IOR op.

gcc/testsuite/ChangeLog:

        * gcc.target/riscv/rvv/autovec/slp-interleave-5.c: New test.

Signed-off-by: Vineet Gupta <vine...@rivosinc.com>

OK.  Though I don't see any improvements in the pre-commit tester.
jeff