I'm having trouble in understanding the term sequnce in an insn chain.get_insns() actually returns the current instruction.What does the term "sequence" mean,as the name suggests it must be a sequence of instructions ,but in an instruction chain,a single element will be an instruction ,then what is meant by sequence.
When push_topmost_sequence is called ,it should push a sequence of instructions ,but an element of insn chain is a single instruction,then which sequence will be pushed. Suppose following is a sequnce of instructions. 1) entry_insns = get_insns (); 2) push_topmost_sequence (); 3) emit_insn_after (entry_insns, get_insns ()); 4) pop_topmost_sequence (); In 1) current insn is saved in entry_insns. what is happening in In 2).Is sequence differnet from insn in an insn chain ,any example will be helpful. In 3) instruction the entry_insns is being put after the instruction obtained through get_insns() .But does get_insns() also increaments the current instruction pointer.If not then shouldn't the same instruction be emitted in 3). Now again which sequnce is being poped out in 4). On 7/1/06, Eric Christopher <[EMAIL PROTECTED]> wrote:
kernel coder wrote: > hi, > I'm trying to understand the backend code of gcc for MIPS > architecture.I'm having some trouble while understanding following > functions. I think most of these are obvious, what problems in specific are you having with them? -eric
