Bharati Bhole writes:
> >
> > p debug_rtx(desc)
> >
> >
> (gdb) p debug_rtx(desc)
> (define_expand ("fix_truncdfdi2")
> [
> (parallel [
> (set (match_operand:DI 0 ("nonimmediate_operand") (""))
> (fix:DI (match_operand:DF 1 ("register_operand") (""))))
> (clobber (reg:CC 17 [0]))
> ])
> ] ("TARGET_80387 || (TARGET_64BIT && TARGET_SSE2)") ("{
> if (TARGET_64BIT && TARGET_SSE2)
> {
> rtx out = REG_P (operands[0]) ? operands[0] : gen_reg_rtx (DImode);
> emit_insn (gen_fix_truncdfdi_sse (out, operands[1]));
> if (out != operands[0])
> emit_move_insn (operands[0], out);
> DONE;
> }
> }"))
> $17 = void
OK, so define_expand: see 13.15 Defining RTL Sequences for Code Generation.
parallel: see 11.15 Side Effect Expressions
match_operand:: see 13.4 RTL Template
TARGET_xx are macros in the target.h header files.
gen_blah generates another insn.
emit_move_insn() is obvious.
... etc.
So, this seems to be documented. I can't see anything here that is
obscure or undocumented.
Andrew.
