diff options
| author | Ju-Zhe Zhong <juzhe.zhong@rivai.ai> | 2023-01-10 06:40:07 +0800 |
|---|---|---|
| committer | Kito Cheng <kito.cheng@sifive.com> | 2023-01-27 03:10:16 +0800 |
| commit | 00fb7698f0b3ae14d6d472db0f8b64744c84678b (patch) | |
| tree | a5a44b1b3aa3409f8b78ea74f3efbcd58349d0c3 /gcc | |
| parent | cfe3fbc678d7b69785d2b017d3ff3cd78cd91580 (diff) | |
| download | gcc-00fb7698f0b3ae14d6d472db0f8b64744c84678b.zip gcc-00fb7698f0b3ae14d6d472db0f8b64744c84678b.tar.gz gcc-00fb7698f0b3ae14d6d472db0f8b64744c84678b.tar.bz2 | |
RISC-V: Avoid redundant flow in forward fusion
gcc/ChangeLog:
* config/riscv/riscv-vsetvl.cc (pass_vsetvl::forward_demand_fusion):
Add pre-check for redundant flow.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/riscv/riscv-vsetvl.cc | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/config/riscv/riscv-vsetvl.cc b/gcc/config/riscv/riscv-vsetvl.cc index f67459c..9140b18 100644 --- a/gcc/config/riscv/riscv-vsetvl.cc +++ b/gcc/config/riscv/riscv-vsetvl.cc @@ -2141,6 +2141,9 @@ pass_vsetvl::forward_demand_fusion (void) if (!prop.valid_or_dirty_p ()) continue; + if (cfg_bb == ENTRY_BLOCK_PTR_FOR_FN (cfun)) + continue; + edge e; edge_iterator ei; /* Forward propagate to each successor. */ @@ -2154,6 +2157,11 @@ pass_vsetvl::forward_demand_fusion (void) /* It's quite obvious, we don't need to propagate itself. */ if (e->dest->index == cfg_bb->index) continue; + /* We don't propagate through critical edges. */ + if (e->flags & EDGE_COMPLEX) + continue; + if (e->dest->index == EXIT_BLOCK_PTR_FOR_FN (cfun)->index) + continue; /* If there is nothing to propagate, just skip it. */ if (!local_dem.valid_or_dirty_p ()) |