gcc/

	* rtl.h (classify_insn): Declare.
	* emit-rtl.c (classify_insn): Move to...
	* rtl.c: ...here and add generator support.
	* gensupport.h (get_emit_function, needs_barrier_p): Declare.
	* gensupport.c (get_emit_function, needs_barrier_p): New functions.
	* genemit.c (gen_emit_seq): New function.
	(gen_expand, gen_split): Use it.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@224470 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 48 insertions, 0 deletions

diff --git a/gcc/rtl.c b/gcc/rtl.c
index 6341b69c60d..346155e9faf 100644
--- a/gcc/rtl.c
+++ b/gcc/rtl.c
@@ -657,6 +657,54 @@ rtx_equal_p (const_rtx x, const_rtx y)
   return 1;
 }
 
+/* Return an indication of which type of insn should have X as a body.
+   In generator files, this can be UNKNOWN if the answer is only known
+   at (GCC) runtime.  Otherwise the value is CODE_LABEL, INSN, CALL_INSN
+   or JUMP_INSN.  */
+
+enum rtx_code
+classify_insn (rtx x)
+{
+  if (LABEL_P (x))
+    return CODE_LABEL;
+  if (GET_CODE (x) == CALL)
+    return CALL_INSN;
+  if (ANY_RETURN_P (x))
+    return JUMP_INSN;
+  if (GET_CODE (x) == SET)
+    {
+      if (GET_CODE (SET_DEST (x)) == PC)
+	return JUMP_INSN;
+      else if (GET_CODE (SET_SRC (x)) == CALL)
+	return CALL_INSN;
+      else
+	return INSN;
+    }
+  if (GET_CODE (x) == PARALLEL)
+    {
+      int j;
+      for (j = XVECLEN (x, 0) - 1; j >= 0; j--)
+	if (GET_CODE (XVECEXP (x, 0, j)) == CALL)
+	  return CALL_INSN;
+	else if (GET_CODE (XVECEXP (x, 0, j)) == SET
+		 && GET_CODE (SET_DEST (XVECEXP (x, 0, j))) == PC)
+	  return JUMP_INSN;
+	else if (GET_CODE (XVECEXP (x, 0, j)) == SET
+		 && GET_CODE (SET_SRC (XVECEXP (x, 0, j))) == CALL)
+	  return CALL_INSN;
+    }
+#ifdef GENERATOR_FILE
+  if (GET_CODE (x) == MATCH_OPERAND
+      || GET_CODE (x) == MATCH_OPERATOR
+      || GET_CODE (x) == MATCH_PARALLEL
+      || GET_CODE (x) == MATCH_OP_DUP
+      || GET_CODE (x) == MATCH_DUP
+      || GET_CODE (x) == PARALLEL)
+    return UNKNOWN;
+#endif
+  return INSN;
+}
+
 void
 dump_rtx_statistics (void)
 {