FILE *F = env->out;
char cmd_buf[256], cmnt_buf[256];
const lc_arg_env_t *arg_env = ia32_get_arg_env();
+ ir_mode *mode = get_irn_mode(n);
+ tarval *tv = get_ia32_Immop_tarval(n);
- if (get_ia32_Immop_tarval(n) == get_tarval_null(get_irn_mode(n))) {
+ /* beware: in some rare cases mode is mode_b which has no tarval_null() */
+ if (tv == get_tarval_b_false() || tv == get_tarval_null(mode)) {
const char *instr = "xor";
if (env->isa->opt_arch == arch_pentium_4) {
/* P4 prefers sub r, r, others xor r, r */
IA32_DO_EMIT(irn);
}
+/**
+ * Emits code to increase stack pointer.
+ */
+static void emit_ia32_SubSP(const ir_node *irn, ia32_emit_env_t *emit_env) {
+ FILE *F = emit_env->out;
+ char cmd_buf[SNPRINTF_BUF_LEN], cmnt_buf[SNPRINTF_BUF_LEN];
+
+ if (is_ia32_ImmConst(irn)) {
+ lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1D, %C", irn, irn);
+ }
+ else if (is_ia32_ImmSymConst(irn)) {
+ if (get_ia32_op_type(irn) == ia32_Normal)
+ lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1D, OFFSET_FLAT:%C", irn, irn);
+ else /* source address mode */
+ lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1D, [%s%s]", irn, get_id_str(get_ia32_am_sc(irn)), get_ia32_am_offs(irn));
+ }
+ else {
+ lc_esnprintf(ia32_get_arg_env(), cmd_buf, SNPRINTF_BUF_LEN, "add %1D, %2S", irn, irn);
+ }
+ snprintf(cmnt_buf, SNPRINTF_BUF_LEN, "/* free space on stack */");
+
+ IA32_DO_EMIT(irn);
+}
+
/**
* Emits code to load the TLS base
*/
IA32_EMIT(Conv_I2I8Bit);
IA32_EMIT(Const);
IA32_EMIT(AddSP);
+ IA32_EMIT(SubSP);
IA32_EMIT(LdTls);
IA32_EMIT(xCmp);
IA32_EMIT(xCmpSet);
"outs" => [ "stack", "M" ],
},
+"SubSP" => {
+ "irn_flags" => "I",
+ "comment" => "free space on stack",
+ "reg_req" => { "in" => [ "esp", "gp" ], "out" => [ "esp", "none" ] },
+ "outs" => [ "stack", "M" ],
+},
+
"LdTls" => {
"irn_flags" => "R",
"comment" => "get the TLS base address",
return new_op;
}
+/**
+ * Transform a be_SubSP into an ia32_SubSP. Eat up const sizes.
+ */
+static ir_node *gen_be_SubSP(ia32_transform_env_t *env) {
+ ir_node *new_op;
+ const ir_edge_t *edge;
+ ir_node *sz = get_irn_n(env->irn, be_pos_SubSP_size);
+ ir_node *sp = get_irn_n(env->irn, be_pos_SubSP_old_sp);
+
+ new_op = new_rd_ia32_SubSP(env->dbg, env->irg, env->block, sp, sz);
+
+ if (is_ia32_Const(sz)) {
+ set_ia32_Immop_attr(new_op, sz);
+ set_irn_n(new_op, 1, ia32_new_NoReg_gp(env->cg));
+ }
+ else if (is_ia32_Load(sz) && get_ia32_am_flavour(sz) == ia32_O) {
+ set_ia32_immop_type(new_op, ia32_ImmSymConst);
+ set_ia32_op_type(new_op, ia32_AddrModeS);
+ set_ia32_am_sc(new_op, get_ia32_am_sc(sz));
+ add_ia32_am_offs(new_op, get_ia32_am_offs(sz));
+ set_irn_n(new_op, 1, ia32_new_NoReg_gp(env->cg));
+ }
+
+ /* fix proj nums */
+ foreach_out_edge(env->irn, edge) {
+ ir_node *proj = get_edge_src_irn(edge);
+
+ assert(is_Proj(proj));
+
+ if (get_Proj_proj(proj) == pn_be_SubSP_res) {
+ /* the node is not yet exchanged: we need to set the register manually */
+ ia32_attr_t *attr = get_ia32_attr(new_op);
+ attr->slots[pn_ia32_SubSP_stack] = &ia32_gp_regs[REG_ESP];
+ set_Proj_proj(proj, pn_ia32_SubSP_stack);
+ }
+ else if (get_Proj_proj(proj) == pn_be_SubSP_M) {
+ set_Proj_proj(proj, pn_ia32_SubSP_M);
+ }
+ else {
+ assert(0);
+ }
+ }
+
+ SET_IA32_ORIG_NODE(new_op, ia32_get_old_node_name(env->cg, env->irn));
+
+ return new_op;
+}
+
/**
* This function just sets the register for the Unknown node
* as this is not done during register allocation because Unknown
GEN(be_FrameStore);
GEN(be_StackParam);
GEN(be_AddSP);
+ GEN(be_SubSP);
/* set the register for all Unknown nodes */
GEN(Unknown);