snprintf(cmd_buf, SNPRINTF_BUF_LEN, "test %%%s,%s%s ", op1, get_ia32_cnst(irn) ? " " : " %", op2);
lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F */", irn);
+
IA32_DO_EMIT;
finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 0)));
}
TestJmp_emitter(irn, env);
}
+static void emit_ia32_CJmp(const ir_node *irn, ia32_emit_env_t *env) {
+ FILE *F = env->out;
+ char cmd_buf[SNPRINTF_BUF_LEN];
+ char cmnt_buf[SNPRINTF_BUF_LEN];
+
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
+ lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test/cmp */", irn);
+ IA32_DO_EMIT;
+ finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 0)));
+}
+static void emit_ia32_CJmpAM(const ir_node *irn, ia32_emit_env_t *env) {
+ FILE *F = env->out;
+ char cmd_buf[SNPRINTF_BUF_LEN];
+ char cmnt_buf[SNPRINTF_BUF_LEN];
+
+ snprintf(cmd_buf, SNPRINTF_BUF_LEN, " ");
+ lc_esnprintf(ia32_get_arg_env(), cmnt_buf, SNPRINTF_BUF_LEN, "/* %+F omitted redundant test/cmp */", irn);
+ IA32_DO_EMIT;
+ finish_CondJmp(F, irn, get_irn_mode(get_irn_n(irn, 2)));
+}
/*********************************************************
* _ _ _
/* other ia32 emitter functions */
IA32_EMIT(CondJmp);
IA32_EMIT(TestJmp);
+ IA32_EMIT(CJmp);
+ IA32_EMIT(CJmpAM);
IA32_EMIT(SwitchJmp);
IA32_EMIT(CopyB);
IA32_EMIT(CopyB_i);
#undef is_NoMem
#define is_NoMem(irn) (get_irn_op(irn) == op_NoMem)
+typedef int *is_op_func_t(const ir_node *n);
+
static int be_is_NoReg(be_abi_irg_t *babi, const ir_node *irn) {
if (be_abi_get_callee_save_irn(babi, &ia32_gp_regs[REG_XXX]) == irn ||
be_abi_get_callee_save_irn(babi, &ia32_fp_regs[REG_XXXX]) == irn)
return 0;
}
+
+
+/*************************************************
+ * _____ _ _
+ * / ____| | | | |
+ * | | ___ _ __ ___| |_ __ _ _ __ | |_ ___
+ * | | / _ \| '_ \/ __| __/ _` | '_ \| __/ __|
+ * | |___| (_) | | | \__ \ || (_| | | | | |_\__ \
+ * \_____\___/|_| |_|___/\__\__,_|_| |_|\__|___/
+ *
+ *************************************************/
+
/**
* creates a unique ident by adding a number to a tag
*
}
+
+/********************************************************************************************************
+ * _____ _ _ ____ _ _ _ _ _
+ * | __ \ | | | | / __ \ | | (_) (_) | | (_)
+ * | |__) |__ ___ _ __ | |__ ___ | | ___ | | | |_ __ | |_ _ _ __ ___ _ ______ _| |_ _ ___ _ __
+ * | ___/ _ \/ _ \ '_ \| '_ \ / _ \| |/ _ \ | | | | '_ \| __| | '_ ` _ \| |_ / _` | __| |/ _ \| '_ \
+ * | | | __/ __/ |_) | | | | (_) | | __/ | |__| | |_) | |_| | | | | | | |/ / (_| | |_| | (_) | | | |
+ * |_| \___|\___| .__/|_| |_|\___/|_|\___| \____/| .__/ \__|_|_| |_| |_|_/___\__,_|\__|_|\___/|_| |_|
+ * | | | |
+ * |_| |_|
+ ********************************************************************************************************/
+
+/**
+ * NOTE: THESE PEEPHOLE OPTIMIZATIONS MUST BE CALLED AFTER SCHEDULING AND REGISTER ALLOCATION.
+ */
+
+static int ia32_cnst_compare(ir_node *n1, ir_node *n2) {
+ char *c1 = get_ia32_cnst(n1);
+ char *c2 = get_ia32_cnst(n2);
+
+ if (c1 && c2) /* both consts are set -> compare */
+ return strcmp(c1, c2) == 0;
+ else if (!c1 && !c2) /* both consts are not set -> true */
+ return 1;
+
+ return 0;
+}
+
+/**
+ * Checks for potential CJmp/CJmpAM optimization candidates.
+ */
+static ir_node *ia32_determine_cjmp_cand(ir_node *irn, is_op_func_t *is_op_func) {
+ ir_node *cand = NULL;
+ ir_node *prev = sched_prev(irn);
+
+ if (is_Block(prev)) {
+ if (get_Block_n_cfgpreds(prev) == 1)
+ prev = get_Block_cfgpred(prev, 0);
+ else
+ prev = NULL;
+ }
+
+ /* The predecessor must be a ProjX. */
+ if (prev && is_Proj(prev) && get_irn_mode(prev) == mode_X) {
+ prev = get_Proj_pred(prev);
+
+ if (is_op_func(prev))
+ cand = prev;
+ }
+
+ return cand;
+}
+
+static int is_TestJmp_cand(const ir_node *irn) {
+ return is_ia32_TestJmp(irn) || is_ia32_And(irn);
+}
+
+/**
+ * Checks if two consecutive arguments of cand matches
+ * the two arguments of irn (TestJmp).
+ */
+static int is_TestJmp_replacement(ir_node *cand, ir_node *irn) {
+ ir_node *in1 = get_irn_n(irn, 0);
+ ir_node *in2 = get_irn_n(irn, 1);
+ int i, n = get_irn_arity(cand);
+ int same_args = 0;
+ char *c1, *c2;
+
+ for (i = 0; i < n - 1; i++) {
+ if (get_irn_n(cand, i) == in1 &&
+ get_irn_n(cand, i + 1) == in2)
+ {
+ same_args = 1;
+ break;
+ }
+ }
+
+ if (same_args)
+ return ia32_cnst_compare(cand, irn);
+
+ return 0;
+}
+
+/**
+ * Tries to replace a TestJmp by a CJmp or CJmpAM (in case of And)
+ */
+static void ia32_optimize_TestJmp(ir_node *irn, ia32_code_gen_t *cg) {
+ ir_node *cand = ia32_determine_cjmp_cand(irn, is_TestJmp_cand);
+ int replace = 0;
+
+ /* we found a possible candidate */
+ replace = cand ? is_TestJmp_replacement(cand, irn) : 0;
+
+ if (replace) {
+ DBG((cg->mod, LEVEL_1, "replacing %+F by ", irn));
+
+ if (is_ia32_And(cand))
+ set_irn_op(irn, op_ia32_CJmpAM);
+ else
+ set_irn_op(irn, op_ia32_CJmp);
+
+ DB((cg->mod, LEVEL_1, "%+F\n", irn));
+ }
+}
+
+static int is_CondJmp_cand(const ir_node *irn) {
+ return is_ia32_CondJmp(irn) || is_ia32_Sub(irn);
+}
+
+/**
+ * Checks if the arguments of cand are the same of irn.
+ */
+static int is_CondJmp_replacement(ir_node *cand, ir_node *irn) {
+ int i, n = get_irn_arity(cand);
+ int same_args = 0;
+ char *c1, *c2;
+
+ for (i = 0; i < n; i++) {
+ if (get_irn_n(cand, i) == get_irn_n(irn, i)) {
+ same_args = 1;
+ break;
+ }
+ }
+
+ if (same_args)
+ return ia32_cnst_compare(cand, irn);
+
+ return 0;
+}
+
+/**
+ * Tries to replace a CondJmp by a CJmpAM
+ */
+static void ia32_optimize_CondJmp(ir_node *irn, ia32_code_gen_t *cg) {
+ ir_node *cand = ia32_determine_cjmp_cand(irn, is_CondJmp_cand);
+ int replace = 0;
+
+ /* we found a possible candidate */
+ replace = cand ? is_CondJmp_replacement(cand, irn) : 0;
+
+ if (replace) {
+ DBG((cg->mod, LEVEL_1, "replacing %+F by ", irn));
+
+ set_irn_op(irn, op_ia32_CJmp);
+
+ DB((cg->mod, LEVEL_1, "%+F\n", irn));
+ }
+}
+
+/**
+ * Performs Peephole Optimizations
+ */
+void ia32_peephole_optimization(ir_node *irn, void *env) {
+ if (is_ia32_TestJmp(irn)) {
+ ia32_optimize_TestJmp(irn, env);
+ }
+ else if (is_ia32_CondJmp(irn)) {
+ ia32_optimize_CondJmp(irn, env);
+ }
+}
+
+
+
/******************************************************************
* _ _ __ __ _
* /\ | | | | | \/ | | |
* @param is_op_func The check-function
* @return 1 if conditions are fulfilled, 0 otherwise
*/
-static int pred_is_specific_node(const ir_node *pred, int (*is_op_func)(const ir_node *n)) {
+static int pred_is_specific_node(const ir_node *pred, is_op_func_t *is_op_func) {
if (is_Proj(pred) && is_op_func(get_Proj_pred(pred))) {
return 1;
}
"op_flags" => "L|X|Y",
"comment" => "construct conditional jump: CMP A, B && JMPxx LABEL",
"cmp_attr" => " return ia32_compare_immop_attr(attr_a, attr_b);\n",
- "reg_req" => { "in" => [ "gp", "gp", "gp", "gp", "none" ], "out" => [ "none", "none" ] },
+ "reg_req" => { "in" => [ "gp", "gp", "gp", "gp", "none" ] },
},
"TestJmp" => {
"op_flags" => "L|X|Y",
"comment" => "construct conditional jump: TEST A, B && JMPxx LABEL",
- "reg_req" => { "in" => [ "gp", "gp" ], "out" => [ "none", "none" ] },
+ "reg_req" => { "in" => [ "gp", "gp" ] },
+ "cmp_attr" => " return ia32_compare_immop_attr(attr_a, attr_b);\n",
+},
+
+"CJmpAM" => {
+ "op_flags" => "L|X|Y",
+ "comment" => "construct conditional jump without CMP (replaces CondJmp): JMPxx LABEL",
+ "cmp_attr" => " return ia32_compare_immop_attr(attr_a, attr_b);\n",
+ "reg_req" => { "in" => [ "gp", "gp", "gp", "gp", "none" ], "out" => [ "none", "none" ] },
+},
+
+"CJmp" => {
+ "op_flags" => "L|X|Y",
+ "comment" => "construct conditional jump without CMP (replaces TestJmp): JMPxx LABEL",
"cmp_attr" => " return ia32_compare_immop_attr(attr_a, attr_b);\n",
+ "reg_req" => { "in" => [ "gp", "gp" ] },
},
"SwitchJmp" => {