| commit | c9d5b46a25547035e381b0246de5cb553ca8b02d | |
| author | Juzhe-Zhong <juzhe.zhong@rivai.ai> | |
| Wed, 6 Dec 2023 14:26:46 +0000 (6 22:26 +0800) | ||
| committer | Pan Li <pan2.li@intel.com> | |
| Wed, 6 Dec 2023 14:35:18 +0000 (6 22:35 +0800) | ||
| tree | 3e00bc1fb0e732482204d52711e7337e45e5f665 | treesnapshot (tar.gz zip) |
| parent | c1e54c82a9e1855499ef7bb8827540e6a097532b | commitdiff |
RISC-V: Fix VSETVL PASS bug
As PR112855 mentioned, the VSETVL PASS insert vsetvli in unexpected location.
Due to 2 reasons:
1. incorrect transparant computation LCM data. We need to check VL operand defs and uses.
2. incorrect fusion of unrelated edge which is the edge never reach the vsetvl expression.
PR target/112855
gcc/ChangeLog:
* config/riscv/riscv-vsetvl.cc
(pre_vsetvl::compute_lcm_local_properties): Fix transparant LCM data.
(pre_vsetvl::earliest_fuse_vsetvl_info): Disable earliest fusion for unrelated edge.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/pr112855.c: New test.
As PR112855 mentioned, the VSETVL PASS insert vsetvli in unexpected location.
Due to 2 reasons:
1. incorrect transparant computation LCM data. We need to check VL operand defs and uses.
2. incorrect fusion of unrelated edge which is the edge never reach the vsetvl expression.
PR target/112855
gcc/ChangeLog:
* config/riscv/riscv-vsetvl.cc
(pre_vsetvl::compute_lcm_local_properties): Fix transparant LCM data.
(pre_vsetvl::earliest_fuse_vsetvl_info): Disable earliest fusion for unrelated edge.
gcc/testsuite/ChangeLog:
* gcc.target/riscv/rvv/autovec/pr112855.c: New test.
| gcc/config/riscv/riscv-vsetvl.cc | diffblobblamehistory | |
| gcc/testsuite/gcc.target/riscv/rvv/autovec/pr112855.c | [new file with mode: 0644] | blob |