"redriver jiang" <[EMAIL PROTECTED]> writes: > Hello, recently I am porting the GCC backend to a DSP. The GCC > Internals document says that the unnamed insns are used to translate > RTL insns to the assembler insns, but I find that the unnamed insn > patterns can be used in combine phase to combine insns by reading the > "*arith_shiftsi" insn pattern in arm.md file..This "*arith_shiftsi" > insn pattern is used to combine the "plus insn" and "shift insn" into > "add rd,Rn,rm,shift immediate_operand".Is my understanding correct?
Yes. Ian
