[NDS32] Refine ADJUST_INSN_LENGTH implementation.

gcc/
	* config/nds32/nds32.c (nds32_adjust_insn_length): Refine.
	* config/nds32/nds32.h (ADJUST_INSN_LENGTH): Change the location in
	file.

From-SVN: r259187

gcc/ChangeLog

 2018-04-06  Chung-Ju Wu  <jasonwucj@gmail.com>
+
+	* config/nds32/nds32.c (nds32_adjust_insn_length): Refine.
+	* config/nds32/nds32.h (ADJUST_INSN_LENGTH): Change the location in
+	file.
+
+2018-04-06  Chung-Ju Wu  <jasonwucj@gmail.com>
 	    Kito Cheng  <kito.cheng@gmail.com>
 
 	* config/nds32/nds32-md-auxiliary.c (nds32_output_return,

gcc/config/nds32/nds32.c

@@ -1328,6 +1328,35 @@ nds32_register_passes (void)
 /* PART 3: Implement target hook stuff definitions.  */
 
 
+/* Computing the Length of an Insn.
+   Modifies the length assigned to instruction INSN.
+   LEN is the initially computed length of the insn.  */
+int
+nds32_adjust_insn_length (rtx_insn *insn, int length)
+{
+  int adjust_value = 0;
+  switch (recog_memoized (insn))
+    {
+    case CODE_FOR_call_internal:
+    case CODE_FOR_call_value_internal:
+      {
+	/* We need insert a nop after a noretun function call
+	   to prevent software breakpoint corrupt the next function. */
+	if (find_reg_note (insn, REG_NORETURN, NULL_RTX))
+	  {
+	    if (TARGET_16_BIT)
+	      adjust_value += 2;
+	    else
+	      adjust_value += 4;
+	  }
+      }
+      return length + adjust_value;
+
+    default:
+      return length;
+    }
+}
+
 /* Register Usage.  */
 
 static void
@@ -4364,37 +4393,6 @@ nds32_ls_333_p (rtx rt, rtx ra, rtx imm, machine_mode mode)
   return false;
 }
 
-
-/* Computing the Length of an Insn.
-   Modifies the length assigned to instruction INSN.
-   LEN is the initially computed length of the insn.  */
-int
-nds32_adjust_insn_length (rtx_insn *insn, int length)
-{
-  rtx src, dst;
-
-  switch (recog_memoized (insn))
-    {
-    case CODE_FOR_move_df:
-    case CODE_FOR_move_di:
-      /* Adjust length of movd44 to 2.  */
-      src = XEXP (PATTERN (insn), 1);
-      dst = XEXP (PATTERN (insn), 0);
-
-      if (REG_P (src)
-	  && REG_P (dst)
-	  && (REGNO (src) % 2) == 0
-	  && (REGNO (dst) % 2) == 0)
-	length = 2;
-      break;
-
-    default:
-      break;
-    }
-
-  return length;
-}
-
 bool
 nds32_split_double_word_load_store_p(rtx *operands, bool load_p)
 {

gcc/config/nds32/nds32.h

@@ -24,6 +24,9 @@
 /* The following are auxiliary macros or structure declarations
    that are used all over the nds32.c and nds32.h.  */
 
+#define ADJUST_INSN_LENGTH(INSN, LENGTH) \
+  (LENGTH = nds32_adjust_insn_length (INSN, LENGTH))
+
 /* Use SYMBOL_FLAG_MACH_DEP to define our own symbol_ref flag.
    It is used in nds32_encode_section_info() to store flag in symbol_ref
    in case the symbol should be placed in .rodata section.
@@ -41,10 +44,6 @@ enum nds32_expand_result_type
   EXPAND_CREATE_TEMPLATE
 };
 
-/* Computing the Length of an Insn.  */
-#define ADJUST_INSN_LENGTH(INSN, LENGTH) \
-  (LENGTH = nds32_adjust_insn_length (INSN, LENGTH))
-
 /* Check instruction LS-37-FP-implied form.
    Note: actually its immediate range is imm9u
          since it is used for lwi37/swi37 instructions.  */