在 2026/3/17 18:47, Radosav Krunic 写道: > > [PATCH v2 13/18] Make rtl if-conversion more common: > https://sourceware.org/pipermail/gcc-patches/2025-March/677824.html > Since commit "ifcvt: Clarify if_info.original_cost" (9ff5cadac4579fe714dc8de3a39eaef8534c64f7) introduced a new cost model in ifcvt, the original patch is no longer applicable.
Following the implementation pattern adopted by other architectures like RISC-V, we should refactor mips_noce_conversion_profitable_p in this way: 1. Create a local copy of struct noce_if_info rather than modifying the original input structure directly; 2. Compensate target-specific costs by incrementing original_cost (mips_if_info.original_cost) and max_seq_cost appropriately whenever conditional move sequences are detected; 3. Invoke default_noce_conversion_profitable_p finally to keep consistent with the upstream standard cost logic. In addition, we can incorporate the existing ifcvt-related test cases from commits ef6c3095aabe75af727a269d91d9ffa37f982ace and 9d5dbf706ad3114fa2c77b15a7bc8ce22e61b17d to ensure full test coverage for this change. Best regards, Jie
