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RISC-V: Change VSETVL PASS always call split_all_insns

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Since LCM will destroy CFG, we are going to reorder the location of VSETVL PASS
at least before bbro (block-reorder PASS) which is before split3 PASS. We need
to call it in VSETVL PASS to get final RVV instructions patterns.

gcc/ChangeLog:

	* config/riscv/riscv-vsetvl.cc (pass_vsetvl::execute): Always call split_all_insns.
This commit is contained in:
Ju-Zhe Zhong 2023-01-18 10:50:14 +08:00 • committed by Kito Cheng
parent e3bcf07262
commit ca8fb00967
1 changed files with 4 additions and 6 deletions
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10
gcc/config/riscv/riscv-vsetvl.cc
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@ -3086,12 +3086,10 @@ pass_vsetvl::execute (function *)
if (n_basic_blocks_for_fn (cfun) <= 0)
return 0;
/* The reason we have this since we didn't finish splitting yet
when optimize == 0. In this case, we should conservatively
split all instructions here to make sure we don't miss any
RVV instruction. */
if (!optimize)
split_all_insns ();
/* The RVV instruction may change after split which is not a stable
instruction. We need to split it here to avoid potential issue
since the VSETVL PASS is insert before split PASS. */
split_all_insns ();
/* Early return for there is no vector instructions. */
if (!has_vector_insn (cfun))