Support {MIN,MAX}_EXPR in GIMPLE FE.

2019-05-09  Martin Liska  <mliska@suse.cz>

	* gimple-pretty-print.c (dump_binary_rhs): Dump MIN_EXPR
	and MAX_EXPR in GIMPLE FE format.
2019-05-09  Martin Liska  <mliska@suse.cz>

	* gimple-parser.c (c_parser_gimple_statement): Support __MIN and
	__MAX.
	(c_parser_gimple_unary_expression): Parse also binary expression
	__MIN and __MAX.
	(c_parser_gimple_parentized_binary_expression): New function.
2019-05-09  Martin Liska  <mliska@suse.cz>

	* gcc.dg/gimplefe-39.c: New test.

From-SVN: r271035

gcc/ChangeLog

 2019-05-09  Martin Liska  <mliska@suse.cz>
 
+	* gimple-pretty-print.c (dump_binary_rhs): Dump MIN_EXPR
+	and MAX_EXPR in GIMPLE FE format.
+
+2019-05-09  Martin Liska  <mliska@suse.cz>
+
 	* tree-cfg.c (dump_function_to_file): Dump entry BB count.
 	* gimple-pretty-print.c (dump_gimple_bb_header):
 	Dump BB count.

gcc/c/ChangeLog

 2019-05-09  Martin Liska  <mliska@suse.cz>
 
+	* gimple-parser.c (c_parser_gimple_statement): Support __MIN and
+	__MAX.
+	(c_parser_gimple_unary_expression): Parse also binary expression
+	__MIN and __MAX.
+	(c_parser_gimple_parentized_binary_expression): New function.
+
+2019-05-09  Martin Liska  <mliska@suse.cz>
+
 	* gimple-parser.c (struct gimple_parser): Add probability.
 	for gimple_parser_edge.
 	(gimple_parser::push_edge): Add new argument probability.

gcc/c/gimple-parser.c

@@ -750,7 +750,9 @@ c_parser_gimple_statement (gimple_parser &parser, gimple_seq *seq)
       {
 	tree id = c_parser_peek_token (parser)->value;
 	if (strcmp (IDENTIFIER_POINTER (id), "__ABS") == 0
-	    || strcmp (IDENTIFIER_POINTER (id), "__ABSU") == 0)
+	    || strcmp (IDENTIFIER_POINTER (id), "__ABSU") == 0
+	    || strcmp (IDENTIFIER_POINTER (id), "__MIN") == 0
+	    || strcmp (IDENTIFIER_POINTER (id), "__MAX") == 0)
 	  goto build_unary_expr;
 	break;
       }
@@ -989,6 +991,32 @@ c_parser_gimple_binary_expression (gimple_parser &parser)
   return ret;
 }
 
+/* Parse a gimple parentized binary expression.  */
+
+static c_expr
+c_parser_gimple_parentized_binary_expression (gimple_parser &parser,
+					      location_t op_loc,
+					      tree_code code)
+{
+  struct c_expr ret;
+  ret.set_error ();
+
+  c_parser_consume_token (parser);
+  if (!c_parser_require (parser, CPP_OPEN_PAREN, "expected %<(%>"))
+    return ret;
+  c_expr op1 = c_parser_gimple_postfix_expression (parser);
+  if (!c_parser_require (parser, CPP_COMMA, "expected %<,%>"))
+    return ret;
+  c_expr op2 = c_parser_gimple_postfix_expression (parser);
+  if (!c_parser_require (parser, CPP_CLOSE_PAREN, "expected %<)%>"))
+    return ret;
+
+  if (op1.value != error_mark_node && op2.value != error_mark_node)
+    ret.value = build2_loc (op_loc,
+			    code, TREE_TYPE (op1.value), op1.value, op2.value);
+  return ret;
+}
+
 /* Parse gimple unary expression.
 
    gimple-unary-expression:
@@ -1078,6 +1106,14 @@ c_parser_gimple_unary_expression (gimple_parser &parser)
 	      op = c_parser_gimple_postfix_expression (parser);
 	      return parser_build_unary_op (op_loc, ABSU_EXPR, op);
 	    }
+	  else if (strcmp (IDENTIFIER_POINTER (id), "__MIN") == 0)
+	    return c_parser_gimple_parentized_binary_expression (parser,
+								 op_loc,
+								 MIN_EXPR);
+	  else if (strcmp (IDENTIFIER_POINTER (id), "__MAX") == 0)
+	    return c_parser_gimple_parentized_binary_expression (parser,
+								 op_loc,
+								 MAX_EXPR);
 	  else
 	    return c_parser_gimple_postfix_expression (parser);
 	}

gcc/gimple-pretty-print.c

@@ -423,9 +423,22 @@ dump_binary_rhs (pretty_printer *buffer, gassign *gs, int spc,
   enum tree_code code = gimple_assign_rhs_code (gs);
   switch (code)
     {
-    case COMPLEX_EXPR:
     case MIN_EXPR:
     case MAX_EXPR:
+      if (flags & TDF_GIMPLE)
+	{
+	  pp_string (buffer, code == MIN_EXPR ? "__MIN (" : "__MAX (");
+	  dump_generic_node (buffer, gimple_assign_rhs1 (gs), spc, flags,
+			     false);
+	  pp_string (buffer, ", ");
+	  dump_generic_node (buffer, gimple_assign_rhs2 (gs), spc, flags,
+			     false);
+	  pp_string (buffer, ")");
+	  break;
+	}
+      else
+	gcc_fallthrough ();
+    case COMPLEX_EXPR:
     case VEC_WIDEN_MULT_HI_EXPR:
     case VEC_WIDEN_MULT_LO_EXPR:
     case VEC_WIDEN_MULT_EVEN_EXPR:

gcc/testsuite/ChangeLog

 2019-05-09  Martin Liska  <mliska@suse.cz>
 
+	* gcc.dg/gimplefe-39.c: New test.
+
+2019-05-09  Martin Liska  <mliska@suse.cz>
+
 	* gcc.dg/gimplefe-37.c: New test.
 	* gcc.dg/gimplefe-33.c: Likewise.
 

gcc/testsuite/gcc.dg/gimplefe-39.c

+/* { dg-do compile } */
+/* { dg-options "-O2 -fgimple -fdump-tree-optimized" } */
+
+int a, b;
+
+int __GIMPLE (ssa,guessed_local(1073741824))
+main (int argc)
+{
+  int _1;
+  int _2;
+  int _4;
+
+  __BB(2,guessed_local(1073741824)):
+  _1 = a;
+  _2 = b;
+  _4 = __MAX (_1, _2);
+  return _4;
+
+}
+
+/* { dg-final { scan-tree-dump "MAX_EXPR" "optimized" } } */