Hi,
> By the way, RTL is not really machine-independent. The data
> structures are machine independent. But the contents are not. You
> can not, even in principle, take the RTL generated for one processor
> and compile it on another processor.
I thought that RTL represented something close to the target machine,
but not machine-dependent. I firstly thought that the output of the
middle-end was an RTL machine-independent representation, to which is
applied a few low-optimization machine-independent passes, and after
that is translated to a RTL machine-dependent to be applied other
optimization passes.
I read the rtl.def and rtl.h files, are very interesting, and i better
understand the whole process. But reading the output files by debuggin
options (-fdump-rtl-all) i have seen instructions like this:
(insn 8 6 10 1 (set (mem/c/i:SI (plus:DI (reg/f:DI 54 virtual-stack-vars)
(const_int -8 [0xfffffffffffffff8])) [0 a+0 S4 A64])
(const_int 1 [0x1])) -1 (nil)
(nil))
Among the multiple questions that appears i have a particular one,
what does "8 6 10 1" represents? Is it the "print format" defined in
rtl.def?
Thanks,
Fran
