Auto-generate maybe_fold_and/or_comparisons from match.pd

2019-09-16  Li Jia He  <helijia@linux.ibm.com>
	    Martin Liska  <mliska@suse.cz>

	* gimple-fold.c (and_comparisons_1): Add type as first
	argument.
	(and_var_with_comparison): Likewise.
	(and_var_with_comparison_1): Likewise.
	(or_comparisons_1): Likewise.
	(or_var_with_comparison): Likewise.
	(or_var_with_comparison_1): Likewise.
	(maybe_fold_and_comparisons): Call maybe_fold_comparisons_from_match_pd.
	(maybe_fold_or_comparisons): Likewise.
	(maybe_fold_comparisons_from_match_pd): New.
	* gimple-fold.h (maybe_fold_and_comparisons): Add type argument.
	(maybe_fold_or_comparisons): Likewise.
	* gimple.c (gimple_size): Make it public and add num_ops argument.
	(gimple_init): New function.
	(gimple_alloc): Call gimple_init.
	* gimple.h (gimple_size): New.
	(gimple_init): Likewise.
	* tree-if-conv.c (fold_or_predicates): Pass type.
	* tree-ssa-ifcombine.c (ifcombine_ifandif): Likewise.
	* tree-ssa-reassoc.c (eliminate_redundant_comparison): Likewise.
	(optimize_vec_cond_expr): Likewise.
	(ovce_extract_ops): Return type of conditional expression.
	* tree-ssanames.c (init_ssa_name_imm_use): New.
	(make_ssa_name_fn): Use init_ssa_name_imm_use.
	* tree-ssanames.h (init_ssa_name_imm_use): New.

Co-Authored-By: Martin Liska <mliska@suse.cz>

From-SVN: r275748

gcc/ChangeLog

+2019-09-16  Li Jia He  <helijia@linux.ibm.com>
+	    Martin Liska  <mliska@suse.cz>
+
+	* gimple-fold.c (and_comparisons_1): Add type as first
+	argument.
+	(and_var_with_comparison): Likewise.
+	(and_var_with_comparison_1): Likewise.
+	(or_comparisons_1): Likewise.
+	(or_var_with_comparison): Likewise.
+	(or_var_with_comparison_1): Likewise.
+	(maybe_fold_and_comparisons): Call maybe_fold_comparisons_from_match_pd.
+	(maybe_fold_or_comparisons): Likewise.
+	(maybe_fold_comparisons_from_match_pd): New.
+	* gimple-fold.h (maybe_fold_and_comparisons): Add type argument.
+	(maybe_fold_or_comparisons): Likewise.
+	* gimple.c (gimple_size): Make it public and add num_ops argument.
+	(gimple_init): New function.
+	(gimple_alloc): Call gimple_init.
+	* gimple.h (gimple_size): New.
+	(gimple_init): Likewise.
+	* tree-if-conv.c (fold_or_predicates): Pass type.
+	* tree-ssa-ifcombine.c (ifcombine_ifandif): Likewise.
+	* tree-ssa-reassoc.c (eliminate_redundant_comparison): Likewise.
+	(optimize_vec_cond_expr): Likewise.
+	(ovce_extract_ops): Return type of conditional expression.
+	* tree-ssanames.c (init_ssa_name_imm_use): New.
+	(make_ssa_name_fn): Use init_ssa_name_imm_use.
+	* tree-ssanames.h (init_ssa_name_imm_use): New.
+
 2019-09-16  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/91756

gcc/gimple-fold.c

@@ -5371,22 +5371,22 @@ same_bool_result_p (const_tree op1, const_tree op2)
 /* Forward declarations for some mutually recursive functions.  */
 
 static tree
-and_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
+and_comparisons_1 (tree type, enum tree_code code1, tree op1a, tree op1b,
 		   enum tree_code code2, tree op2a, tree op2b);
 static tree
-and_var_with_comparison (tree var, bool invert,
+and_var_with_comparison (tree type, tree var, bool invert,
 			 enum tree_code code2, tree op2a, tree op2b);
 static tree
-and_var_with_comparison_1 (gimple *stmt,
+and_var_with_comparison_1 (tree type, gimple *stmt,
 			   enum tree_code code2, tree op2a, tree op2b);
 static tree
-or_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
+or_comparisons_1 (tree, enum tree_code code1, tree op1a, tree op1b,
 		  enum tree_code code2, tree op2a, tree op2b);
 static tree
-or_var_with_comparison (tree var, bool invert,
+or_var_with_comparison (tree, tree var, bool invert,
 			enum tree_code code2, tree op2a, tree op2b);
 static tree
-or_var_with_comparison_1 (gimple *stmt,
+or_var_with_comparison_1 (tree, gimple *stmt,
 			  enum tree_code code2, tree op2a, tree op2b);
 
 /* Helper function for and_comparisons_1:  try to simplify the AND of the
@@ -5395,7 +5395,7 @@ or_var_with_comparison_1 (gimple *stmt,
    Return NULL_EXPR if we can't simplify this to a single expression.  */
 
 static tree
-and_var_with_comparison (tree var, bool invert,
+and_var_with_comparison (tree type, tree var, bool invert,
 			 enum tree_code code2, tree op2a, tree op2b)
 {
   tree t;
@@ -5409,11 +5409,11 @@ and_var_with_comparison (tree var, bool invert,
      !var AND (op2a code2 op2b) => !(var OR !(op2a code2 op2b))
      Then we only have to consider the simpler non-inverted cases.  */
   if (invert)
-    t = or_var_with_comparison_1 (stmt, 
+    t = or_var_with_comparison_1 (type, stmt,
 				  invert_tree_comparison (code2, false),
 				  op2a, op2b);
   else
-    t = and_var_with_comparison_1 (stmt, code2, op2a, op2b);
+    t = and_var_with_comparison_1 (type, stmt, code2, op2a, op2b);
   return canonicalize_bool (t, invert);
 }
 
@@ -5422,7 +5422,7 @@ and_var_with_comparison (tree var, bool invert,
    Return NULL_EXPR if we can't simplify this to a single expression.  */
 
 static tree
-and_var_with_comparison_1 (gimple *stmt,
+and_var_with_comparison_1 (tree type, gimple *stmt,
 			   enum tree_code code2, tree op2a, tree op2b)
 {
   tree var = gimple_assign_lhs (stmt);
@@ -5453,7 +5453,7 @@ and_var_with_comparison_1 (gimple *stmt,
   /* If the definition is a comparison, recurse on it.  */
   if (TREE_CODE_CLASS (innercode) == tcc_comparison)
     {
-      tree t = and_comparisons_1 (innercode,
+      tree t = and_comparisons_1 (type, innercode,
 				  gimple_assign_rhs1 (stmt),
 				  gimple_assign_rhs2 (stmt),
 				  code2,
@@ -5489,18 +5489,20 @@ and_var_with_comparison_1 (gimple *stmt,
       else if (inner1 == false_test_var)
 	return (is_and
 		? boolean_false_node
-		: and_var_with_comparison (inner2, false, code2, op2a, op2b));
+		: and_var_with_comparison (type, inner2, false, code2, op2a,
+					   op2b));
       else if (inner2 == false_test_var)
 	return (is_and
 		? boolean_false_node
-		: and_var_with_comparison (inner1, false, code2, op2a, op2b));
+		: and_var_with_comparison (type, inner1, false, code2, op2a,
+					   op2b));
 
       /* Next, redistribute/reassociate the AND across the inner tests.
 	 Compute the first partial result, (inner1 AND (op2a code op2b))  */
       if (TREE_CODE (inner1) == SSA_NAME
 	  && is_gimple_assign (s = SSA_NAME_DEF_STMT (inner1))
 	  && TREE_CODE_CLASS (gimple_assign_rhs_code (s)) == tcc_comparison
-	  && (t = maybe_fold_and_comparisons (gimple_assign_rhs_code (s),
+	  && (t = maybe_fold_and_comparisons (type, gimple_assign_rhs_code (s),
 					      gimple_assign_rhs1 (s),
 					      gimple_assign_rhs2 (s),
 					      code2, op2a, op2b)))
@@ -5532,7 +5534,7 @@ and_var_with_comparison_1 (gimple *stmt,
       if (TREE_CODE (inner2) == SSA_NAME
 	  && is_gimple_assign (s = SSA_NAME_DEF_STMT (inner2))
 	  && TREE_CODE_CLASS (gimple_assign_rhs_code (s)) == tcc_comparison
-	  && (t = maybe_fold_and_comparisons (gimple_assign_rhs_code (s),
+	  && (t = maybe_fold_and_comparisons (type, gimple_assign_rhs_code (s),
 					      gimple_assign_rhs1 (s),
 					      gimple_assign_rhs2 (s),
 					      code2, op2a, op2b)))
@@ -5588,7 +5590,7 @@ and_var_with_comparison_1 (gimple *stmt,
    in the first comparison but not the second.  */
 
 static tree
-and_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
+and_comparisons_1 (tree type, enum tree_code code1, tree op1a, tree op1b,
 		   enum tree_code code2, tree op2a, tree op2b)
 {
   tree truth_type = truth_type_for (TREE_TYPE (op1a));
@@ -5762,7 +5764,8 @@ and_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
 	{
 	case GIMPLE_ASSIGN:
 	  /* Try to simplify by copy-propagating the definition.  */
-	  return and_var_with_comparison (op1a, invert, code2, op2a, op2b);
+	  return and_var_with_comparison (type, op1a, invert, code2, op2a,
+					  op2b);
 
 	case GIMPLE_PHI:
 	  /* If every argument to the PHI produces the same result when
@@ -5812,7 +5815,7 @@ and_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
 					     gimple_bb (def_stmt),
 					     gimple_bb (stmt)))
 			return NULL_TREE;
-		      temp = and_var_with_comparison (arg, invert, code2,
+		      temp = and_var_with_comparison (type, arg, invert, code2,
 						      op2a, op2b);
 		      if (!temp)
 			return NULL_TREE;
@@ -5834,6 +5837,73 @@ and_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
   return NULL_TREE;
 }
 
+/* Helper function for maybe_fold_and_comparisons and maybe_fold_or_comparisons
+   : try to simplify the AND/OR of the ssa variable VAR with the comparison
+   specified by (OP2A CODE2 OP2B) from match.pd.  Return NULL_EXPR if we can't
+   simplify this to a single expression.  As we are going to lower the cost
+   of building SSA names / gimple stmts significantly, we need to allocate
+   them ont the stack.  This will cause the code to be a bit ugly.  */
+
+static tree
+maybe_fold_comparisons_from_match_pd (tree type, enum tree_code code,
+				      enum tree_code code1,
+				      tree op1a, tree op1b,
+				      enum tree_code code2, tree op2a,
+				      tree op2b)
+{
+  /* Allocate gimple stmt1 on the stack.  */
+  gassign *stmt1
+    = (gassign *) XALLOCAVEC (char, gimple_size (GIMPLE_ASSIGN, 3));
+  gimple_init (stmt1, GIMPLE_ASSIGN, 3);
+  gimple_assign_set_rhs_code (stmt1, code1);
+  gimple_assign_set_rhs1 (stmt1, op1a);
+  gimple_assign_set_rhs2 (stmt1, op1b);
+
+  /* Allocate gimple stmt2 on the stack.  */
+  gassign *stmt2
+    = (gassign *) XALLOCAVEC (char, gimple_size (GIMPLE_ASSIGN, 3));
+  gimple_init (stmt2, GIMPLE_ASSIGN, 3);
+  gimple_assign_set_rhs_code (stmt2, code2);
+  gimple_assign_set_rhs1 (stmt2, op2a);
+  gimple_assign_set_rhs2 (stmt2, op2b);
+
+  /* Allocate SSA names(lhs1) on the stack.  */
+  tree lhs1 = (tree)XALLOCA (tree_ssa_name);
+  memset (lhs1, 0, sizeof (tree_ssa_name));
+  TREE_SET_CODE (lhs1, SSA_NAME);
+  TREE_TYPE (lhs1) = type;
+  init_ssa_name_imm_use (lhs1);
+
+  /* Allocate SSA names(lhs2) on the stack.  */
+  tree lhs2 = (tree)XALLOCA (tree_ssa_name);
+  memset (lhs2, 0, sizeof (tree_ssa_name));
+  TREE_SET_CODE (lhs2, SSA_NAME);
+  TREE_TYPE (lhs2) = type;
+  init_ssa_name_imm_use (lhs2);
+
+  gimple_assign_set_lhs (stmt1, lhs1);
+  gimple_assign_set_lhs (stmt2, lhs2);
+
+  gimple_match_op op (gimple_match_cond::UNCOND, code,
+		      type, gimple_assign_lhs (stmt1),
+		      gimple_assign_lhs (stmt2));
+  if (op.resimplify (NULL, follow_all_ssa_edges))
+    {
+      if (gimple_simplified_result_is_gimple_val (&op))
+	{
+	  tree res = op.ops[0];
+	  if (res == lhs1)
+	    return build2 (code1, type, op1a, op1b);
+	  else if (res == lhs2)
+	    return build2 (code2, type, op2a, op2b);
+	  else
+	    return res;
+	}
+    }
+
+  return NULL_TREE;
+}
+
 /* Try to simplify the AND of two comparisons, specified by
    (OP1A CODE1 OP1B) and (OP2B CODE2 OP2B), respectively.
    If this can be simplified to a single expression (without requiring
@@ -5842,14 +5912,22 @@ and_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
    If the result expression is non-null, it has boolean type.  */
 
 tree
-maybe_fold_and_comparisons (enum tree_code code1, tree op1a, tree op1b,
+maybe_fold_and_comparisons (tree type,
+			    enum tree_code code1, tree op1a, tree op1b,
 			    enum tree_code code2, tree op2a, tree op2b)
 {
-  tree t = and_comparisons_1 (code1, op1a, op1b, code2, op2a, op2b);
-  if (t)
+  if (tree t = and_comparisons_1 (type, code1, op1a, op1b, code2, op2a, op2b))
     return t;
-  else
-    return and_comparisons_1 (code2, op2a, op2b, code1, op1a, op1b);
+
+  if (tree t = and_comparisons_1 (type, code2, op2a, op2b, code1, op1a, op1b))
+    return t;
+
+  if (tree t = maybe_fold_comparisons_from_match_pd (type, BIT_AND_EXPR, code1,
+						     op1a, op1b, code2, op2a,
+						     op2b))
+    return t;
+
+  return NULL_TREE;
 }
 
 /* Helper function for or_comparisons_1:  try to simplify the OR of the
@@ -5858,7 +5936,7 @@ maybe_fold_and_comparisons (enum tree_code code1, tree op1a, tree op1b,
    Return NULL_EXPR if we can't simplify this to a single expression.  */
 
 static tree
-or_var_with_comparison (tree var, bool invert,
+or_var_with_comparison (tree type, tree var, bool invert,
 			enum tree_code code2, tree op2a, tree op2b)
 {
   tree t;
@@ -5872,11 +5950,11 @@ or_var_with_comparison (tree var, bool invert,
      !var OR (op2a code2 op2b) => !(var AND !(op2a code2 op2b))
      Then we only have to consider the simpler non-inverted cases.  */
   if (invert)
-    t = and_var_with_comparison_1 (stmt, 
+    t = and_var_with_comparison_1 (type, stmt,
 				   invert_tree_comparison (code2, false),
 				   op2a, op2b);
   else
-    t = or_var_with_comparison_1 (stmt, code2, op2a, op2b);
+    t = or_var_with_comparison_1 (type, stmt, code2, op2a, op2b);
   return canonicalize_bool (t, invert);
 }
 
@@ -5885,7 +5963,7 @@ or_var_with_comparison (tree var, bool invert,
    Return NULL_EXPR if we can't simplify this to a single expression.  */
 
 static tree
-or_var_with_comparison_1 (gimple *stmt,
+or_var_with_comparison_1 (tree type, gimple *stmt,
 			  enum tree_code code2, tree op2a, tree op2b)
 {
   tree var = gimple_assign_lhs (stmt);
@@ -5916,7 +5994,7 @@ or_var_with_comparison_1 (gimple *stmt,
   /* If the definition is a comparison, recurse on it.  */
   if (TREE_CODE_CLASS (innercode) == tcc_comparison)
     {
-      tree t = or_comparisons_1 (innercode,
+      tree t = or_comparisons_1 (type, innercode,
 				 gimple_assign_rhs1 (stmt),
 				 gimple_assign_rhs2 (stmt),
 				 code2,
@@ -5952,18 +6030,20 @@ or_var_with_comparison_1 (gimple *stmt,
       else if (inner1 == false_test_var)
 	return (is_or
 		? boolean_true_node
-		: or_var_with_comparison (inner2, false, code2, op2a, op2b));
+		: or_var_with_comparison (type, inner2, false, code2, op2a,
+					  op2b));
       else if (inner2 == false_test_var)
 	return (is_or
 		? boolean_true_node
-		: or_var_with_comparison (inner1, false, code2, op2a, op2b));
+		: or_var_with_comparison (type, inner1, false, code2, op2a,
+					  op2b));
       
       /* Next, redistribute/reassociate the OR across the inner tests.
 	 Compute the first partial result, (inner1 OR (op2a code op2b))  */
       if (TREE_CODE (inner1) == SSA_NAME
 	  && is_gimple_assign (s = SSA_NAME_DEF_STMT (inner1))
 	  && TREE_CODE_CLASS (gimple_assign_rhs_code (s)) == tcc_comparison
-	  && (t = maybe_fold_or_comparisons (gimple_assign_rhs_code (s),
+	  && (t = maybe_fold_or_comparisons (type, gimple_assign_rhs_code (s),
 					     gimple_assign_rhs1 (s),
 					     gimple_assign_rhs2 (s),
 					     code2, op2a, op2b)))
@@ -5995,7 +6075,7 @@ or_var_with_comparison_1 (gimple *stmt,
       if (TREE_CODE (inner2) == SSA_NAME
 	  && is_gimple_assign (s = SSA_NAME_DEF_STMT (inner2))
 	  && TREE_CODE_CLASS (gimple_assign_rhs_code (s)) == tcc_comparison
-	  && (t = maybe_fold_or_comparisons (gimple_assign_rhs_code (s),
+	  && (t = maybe_fold_or_comparisons (type, gimple_assign_rhs_code (s),
 					     gimple_assign_rhs1 (s),
 					     gimple_assign_rhs2 (s),
 					     code2, op2a, op2b)))
@@ -6052,7 +6132,7 @@ or_var_with_comparison_1 (gimple *stmt,
    in the first comparison but not the second.  */
 
 static tree
-or_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
+or_comparisons_1 (tree type, enum tree_code code1, tree op1a, tree op1b,
 		  enum tree_code code2, tree op2a, tree op2b)
 {
   tree truth_type = truth_type_for (TREE_TYPE (op1a));
@@ -6226,7 +6306,8 @@ or_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
 	{
 	case GIMPLE_ASSIGN:
 	  /* Try to simplify by copy-propagating the definition.  */
-	  return or_var_with_comparison (op1a, invert, code2, op2a, op2b);
+	  return or_var_with_comparison (type, op1a, invert, code2, op2a,
+					 op2b);
 
 	case GIMPLE_PHI:
 	  /* If every argument to the PHI produces the same result when
@@ -6276,7 +6357,7 @@ or_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
 					     gimple_bb (def_stmt),
 					     gimple_bb (stmt)))
 			return NULL_TREE;
-		      temp = or_var_with_comparison (arg, invert, code2,
+		      temp = or_var_with_comparison (type, arg, invert, code2,
 						     op2a, op2b);
 		      if (!temp)
 			return NULL_TREE;
@@ -6306,16 +6387,23 @@ or_comparisons_1 (enum tree_code code1, tree op1a, tree op1b,
    If the result expression is non-null, it has boolean type.  */
 
 tree
-maybe_fold_or_comparisons (enum tree_code code1, tree op1a, tree op1b,
+maybe_fold_or_comparisons (tree type,
+			   enum tree_code code1, tree op1a, tree op1b,
 			   enum tree_code code2, tree op2a, tree op2b)
 {
-  tree t = or_comparisons_1 (code1, op1a, op1b, code2, op2a, op2b);
-  if (t)
+  if (tree t = or_comparisons_1 (type, code1, op1a, op1b, code2, op2a, op2b))
     return t;
-  else
-    return or_comparisons_1 (code2, op2a, op2b, code1, op1a, op1b);
-}
 
+  if (tree t = or_comparisons_1 (type, code2, op2a, op2b, code1, op1a, op1b))
+    return t;
+
+  if (tree t = maybe_fold_comparisons_from_match_pd (type, BIT_IOR_EXPR, code1,
+						     op1a, op1b, code2, op2a,
+						     op2b))
+    return t;
+
+  return NULL_TREE;
+}
 
 /* Fold STMT to a constant using VALUEIZE to valueize SSA names.
 

gcc/gimple-fold.h

@@ -31,9 +31,9 @@ extern void gimplify_and_update_call_from_tree (gimple_stmt_iterator *, tree);
 extern bool fold_stmt (gimple_stmt_iterator *);
 extern bool fold_stmt (gimple_stmt_iterator *, tree (*) (tree));
 extern bool fold_stmt_inplace (gimple_stmt_iterator *);
-extern tree maybe_fold_and_comparisons (enum tree_code, tree, tree, 
+extern tree maybe_fold_and_comparisons (tree, enum tree_code, tree, tree,
 					enum tree_code, tree, tree);
-extern tree maybe_fold_or_comparisons (enum tree_code, tree, tree,
+extern tree maybe_fold_or_comparisons (tree, enum tree_code, tree, tree,
 				       enum tree_code, tree, tree);
 extern bool optimize_atomic_compare_exchange_p (gimple *);
 extern void fold_builtin_atomic_compare_exchange (gimple_stmt_iterator *);

gcc/gimple.c

@@ -110,10 +110,27 @@ gimple_set_code (gimple *g, enum gimple_code code)
 /* Return the number of bytes needed to hold a GIMPLE statement with
    code CODE.  */
 
-static inline size_t
-gimple_size (enum gimple_code code)
+size_t
+gimple_size (enum gimple_code code, unsigned num_ops)
 {
-  return gsstruct_code_size[gss_for_code (code)];
+  size_t size = gsstruct_code_size[gss_for_code (code)];
+  if (num_ops > 0)
+    size += (sizeof (tree) * (num_ops - 1));
+  return size;
+}
+
+/* Initialize GIMPLE statement G with CODE and NUM_OPS.  */
+
+void
+gimple_init (gimple *g, enum gimple_code code, unsigned num_ops)
+{
+  gimple_set_code (g, code);
+  gimple_set_num_ops (g, num_ops);
+
+  /* Do not call gimple_set_modified here as it has other side
+     effects and this tuple is still not completely built.  */
+  g->modified = 1;
+  gimple_init_singleton (g);
 }
 
 /* Allocate memory for a GIMPLE statement with code CODE and NUM_OPS
@@ -125,10 +142,7 @@ gimple_alloc (enum gimple_code code, unsigned num_ops MEM_STAT_DECL)
   size_t size;
   gimple *stmt;
 
-  size = gimple_size (code);
-  if (num_ops > 0)
-    size += sizeof (tree) * (num_ops - 1);
-
+  size = gimple_size (code, num_ops);
   if (GATHER_STATISTICS)
     {
       enum gimple_alloc_kind kind = gimple_alloc_kind (code);
@@ -137,14 +151,7 @@ gimple_alloc (enum gimple_code code, unsigned num_ops MEM_STAT_DECL)
     }
 
   stmt = ggc_alloc_cleared_gimple_statement_stat (size PASS_MEM_STAT);
-  gimple_set_code (stmt, code);
-  gimple_set_num_ops (stmt, num_ops);
-
-  /* Do not call gimple_set_modified here as it has other side
-     effects and this tuple is still not completely built.  */
-  stmt->modified = 1;
-  gimple_init_singleton (stmt);
-
+  gimple_init (stmt, code, num_ops);
   return stmt;
 }
 

gcc/gimple.h

@@ -1445,6 +1445,8 @@ extern enum gimple_statement_structure_enum const gss_for_code_[];
    of comminucating the profile info to the builtin expanders.  */
 extern gimple *currently_expanding_gimple_stmt;
 
+size_t gimple_size (enum gimple_code code, unsigned num_ops = 0);
+void gimple_init (gimple *g, enum gimple_code code, unsigned num_ops);
 gimple *gimple_alloc (enum gimple_code, unsigned CXX_MEM_STAT_INFO);
 greturn *gimple_build_return (tree);
 void gimple_call_reset_alias_info (gcall *);

gcc/tree-if-conv.c

@@ -436,7 +436,7 @@ fold_or_predicates (location_t loc, tree c1, tree c2)
 
   if (code1 != ERROR_MARK && code2 != ERROR_MARK)
     {
-      tree t = maybe_fold_or_comparisons (code1, op1a, op1b,
+      tree t = maybe_fold_or_comparisons (boolean_type_node, code1, op1a, op1b,
 					  code2, op2a, op2b);
       if (t)
 	return t;

gcc/tree-ssa-ifcombine.c

@@ -555,7 +555,7 @@ ifcombine_ifandif (basic_block inner_cond_bb, bool inner_inv,
 	return false;
       /* Don't return false so fast, try maybe_fold_or_comparisons?  */
 
-      if (!(t = maybe_fold_and_comparisons (inner_cond_code,
+      if (!(t = maybe_fold_and_comparisons (boolean_type_node, inner_cond_code,
 					    gimple_cond_lhs (inner_cond),
 					    gimple_cond_rhs (inner_cond),
 					    outer_cond_code,

gcc/tree-ssa-reassoc.c

@@ -2088,12 +2088,15 @@ eliminate_redundant_comparison (enum tree_code opcode,
 
       /* If we got here, we have a match.  See if we can combine the
 	 two comparisons.  */
+      tree type = TREE_TYPE (gimple_assign_lhs (def1));
       if (opcode == BIT_IOR_EXPR)
-	t = maybe_fold_or_comparisons (lcode, op1, op2,
+	t = maybe_fold_or_comparisons (type,
+				       lcode, op1, op2,
 				       rcode, gimple_assign_rhs1 (def2),
 				       gimple_assign_rhs2 (def2));
       else
-	t = maybe_fold_and_comparisons (lcode, op1, op2,
+	t = maybe_fold_and_comparisons (type,
+					lcode, op1, op2,
 					rcode, gimple_assign_rhs1 (def2),
 					gimple_assign_rhs2 (def2));
       if (!t)
@@ -3745,10 +3748,11 @@ optimize_range_tests (enum tree_code opcode,
 
 /* A subroutine of optimize_vec_cond_expr to extract and canonicalize
    the operands of the VEC_COND_EXPR.  Returns ERROR_MARK on failure,
-   otherwise the comparison code.  */
+   otherwise the comparison code.  TYPE is a return value that is set
+   to type of comparison.  */
 
 static tree_code
-ovce_extract_ops (tree var, gassign **rets, bool *reti)
+ovce_extract_ops (tree var, gassign **rets, bool *reti, tree *type)
 {
   if (TREE_CODE (var) != SSA_NAME)
     return ERROR_MARK;
@@ -3790,6 +3794,8 @@ ovce_extract_ops (tree var, gassign **rets, bool *reti)
     *rets = stmt;
   if (reti)
     *reti = inv;
+  if (type)
+    *type = TREE_TYPE (cond);
   return cmp;
 }
 
@@ -3811,7 +3817,8 @@ optimize_vec_cond_expr (tree_code opcode, vec<operand_entry *> *ops)
 
       gassign *stmt0;
       bool invert;
-      tree_code cmp0 = ovce_extract_ops (elt0, &stmt0, &invert);
+      tree type;
+      tree_code cmp0 = ovce_extract_ops (elt0, &stmt0, &invert, &type);
       if (cmp0 == ERROR_MARK)
 	continue;
 
@@ -3820,7 +3827,7 @@ optimize_vec_cond_expr (tree_code opcode, vec<operand_entry *> *ops)
 	  tree &elt1 = (*ops)[j]->op;
 
 	  gassign *stmt1;
-	  tree_code cmp1 = ovce_extract_ops (elt1, &stmt1, NULL);
+	  tree_code cmp1 = ovce_extract_ops (elt1, &stmt1, NULL, NULL);
 	  if (cmp1 == ERROR_MARK)
 	    continue;
 
@@ -3834,9 +3841,11 @@ optimize_vec_cond_expr (tree_code opcode, vec<operand_entry *> *ops)
 
 	  tree comb;
 	  if (opcode == BIT_AND_EXPR)
-	    comb = maybe_fold_and_comparisons (cmp0, x0, y0, cmp1, x1, y1);
+	    comb = maybe_fold_and_comparisons (type, cmp0, x0, y0, cmp1, x1,
+					       y1);
 	  else if (opcode == BIT_IOR_EXPR)
-	    comb = maybe_fold_or_comparisons (cmp0, x0, y0, cmp1, x1, y1);
+	    comb = maybe_fold_or_comparisons (type, cmp0, x0, y0, cmp1, x1,
+					      y1);
 	  else
 	    gcc_unreachable ();
 	  if (comb == NULL)

gcc/tree-ssanames.c

@@ -252,6 +252,19 @@ flush_ssaname_freelist (void)
   vec_safe_truncate (FREE_SSANAMES_QUEUE (cfun), 0);
 }
 
+/* Initialize SSA_NAME_IMM_USE_NODE of a SSA NAME.  */
+
+void
+init_ssa_name_imm_use (tree name)
+{
+  use_operand_p imm;
+  imm = &(SSA_NAME_IMM_USE_NODE (name));
+  imm->use = NULL;
+  imm->prev = imm;
+  imm->next = imm;
+  imm->loc.ssa_name = name;
+}
+
 /* Return an SSA_NAME node for variable VAR defined in statement STMT
    in function FN.  STMT may be an empty statement for artificial
    references (e.g., default definitions created when a variable is
@@ -263,8 +276,6 @@ make_ssa_name_fn (struct function *fn, tree var, gimple *stmt,
 		  unsigned int version)
 {
   tree t;
-  use_operand_p imm;
-
   gcc_assert (VAR_P (var)
 	      || TREE_CODE (var) == PARM_DECL
 	      || TREE_CODE (var) == RESULT_DECL
@@ -318,11 +329,7 @@ make_ssa_name_fn (struct function *fn, tree var, gimple *stmt,
 
   SSA_NAME_IN_FREE_LIST (t) = 0;
   SSA_NAME_IS_DEFAULT_DEF (t) = 0;
-  imm = &(SSA_NAME_IMM_USE_NODE (t));
-  imm->use = NULL;
-  imm->prev = imm;
-  imm->next = imm;
-  imm->loc.ssa_name = t;
+  init_ssa_name_imm_use (t);
 
   return t;
 }

gcc/tree-ssanames.h

@@ -82,6 +82,7 @@ extern void fini_ssanames (struct function *);
 extern void ssanames_print_statistics (void);
 extern tree make_ssa_name_fn (struct function *, tree, gimple *,
 			      unsigned int version = 0);
+extern void init_ssa_name_imm_use (tree);
 extern void release_ssa_name_fn (struct function *, tree);
 extern bool get_ptr_info_alignment (struct ptr_info_def *, unsigned int *,
 				    unsigned int *);