void unroll_this(pTHX_ OP* op) {
struct sljit_compiler* compiler = sljit_create_compiler();
HV* seenops = newHV();
#ifdef DEBUG
if (getenv("RUNOPS_OPTIMIZED_DEBUG")) {
CV *runcv = Perl_find_runcv(NULL);
sljit_compiler_verbose(compiler, stderr);
DEBUGf(("Unroll %s::%s cv=%p, op=%p (%s)\n", HvNAME_get(CvSTASH(runcv)),
GvENAME(CvGV(runcv)), runcv, op, sljit_get_platform_name()));
}
#endif
sljit_emit_enter(compiler, 0, 2, 1, 0);
unroll_tree(compiler, seenops, op, NULL);
fixup_jumps(compiler, needjumps, labels);
// This is needed for things that drop off the runloop without a
// return, e.g. S_sortcv. TODO: Make conditional?
sljit_emit_return(compiler, SLJIT_MEM, (sljit_w) &PL_op);
op->op_ppaddr = sljit_generate_code(compiler);
op->op_spare = 3;
DEBUGf(("Code at %p\n", op->op_ppaddr));
labels = NULL;
needjumps = NULL;
SvREFCNT_dec(seenops);
sljit_free_compiler(compiler);
}
static int add3(long a, long b, long c)
{
void *code;
unsigned long len;
func3_t func;
/* Create a SLJIT compiler */
struct sljit_compiler *C = sljit_create_compiler();
/* Start a context(function entry), have 3 arguments, discuss later */
sljit_emit_enter(C, 0, 3, 1, 3, 0, 0, 0);
/* The first arguments of function is register SLJIT_S0, 2nd, SLJIT_S1, etc. */
/* R0 = first */
sljit_emit_op1(C, SLJIT_MOV, SLJIT_R0, 0, SLJIT_S0, 0);
/* R0 = R0 + second */
sljit_emit_op2(C, SLJIT_ADD, SLJIT_R0, 0, SLJIT_R0, 0, SLJIT_S1, 0);
/* R0 = R0 + third */
sljit_emit_op2(C, SLJIT_ADD, SLJIT_R0, 0, SLJIT_R0, 0, SLJIT_S2, 0);
/* This statement mov R0 to RETURN REG and return */
/* in fact, R0 is RETURN REG itself */
sljit_emit_return(C, SLJIT_MOV, SLJIT_R0, 0);
/* Generate machine code */
code = sljit_generate_code(C);
len = sljit_get_generated_code_size(C);
/* Execute code */
func = (func3_t)code;
printf("func return %ld\n", func(a, b, c));
/* dump_code(code, len); */
/* Clean up */
sljit_free_compiler(C);
sljit_free_code(code);
return 0;
}