🚀 go-pugleaf

The environment that I am using is:
Sun SPARC ELC
SunOS v4.1.2
GCC v1.42

I am inserting code at the rtl level -- I want to insert my own function call
with one argument and no return value.  I have currently looked at the files
insn-emit.c (for gen_call) and a few others but I am still unclear on how to
set it up.  I understand that the first argument to gen_call should be the
function name.  The second argument I am setting up is the parameter that I
am passing(I first set register %o0 to hold the parameter value).  Is there
any more/less to this?   A copy of the code that I have written is included
here for a function call "_snapshot" and parameter "train_id":

	pattern = gen_rtx(SET, VOIDmode,
	                  gen_rtx(REG, SImode, 8),
	                  gen_rtx(CONST_INT, VOIDmode, train_id++));
	emit_insn_before(pattern, insn);
	pattern = gen_call(gen_rtx(MEM, FUNCTION_MODE,
		              gen_rtx(SYMBOL_REF, SImode, "_snapshot")),
	                   gen_rtx(REG, SImode, 8));
	emit_insn_before(pattern, insn);

Any help with this would be greatly appreciated.

Elliot Stewart
stewart@crhc.uiuc.edu