Re: [PATCH v5 07/18] RISC-V: Add ANDI_ADD macro-fusion recognition

On 8/13/2026 11:58 PM, Jin Ma wrote:
> Recognize ANDI followed by an ADD/ADDI-type instruction when the
> result register forms the required dependency.  An ADD may use the ANDI
> result as both source operands; no source-inequality constraint is
> imposed.
>
> Leave the fusion disabled by default.
>
> gcc/ChangeLog:
>
> 	* config/riscv/riscv-fusion.cc (riscv_fuse_andi_add): New function.
> 	(riscv_fusion_table): Add RISCV_FUSE_ANDI_ADD.
> 	* config/riscv/riscv-protos.h (enum riscv_fusion_pairs): Add
> 	RISCV_FUSE_ANDI_ADD.
>
> gcc/testsuite/ChangeLog:
>
> 	* gcc.target/riscv/fusion-andi-add-addi.c: New test.
> 	* gcc.target/riscv/fusion-andi-adduw-rtl.c: Likewise.
> 	* gcc.target/riscv/fusion-special-positive-rtl-andi-add.c: Likewise.
>
> Signed-off-by: Jin Ma <[email protected]>
OK once prerequisites are approved.

jeff