PR c++/92974 - bogus location for enum and non-enum in ?: warning.

build_min_non_dep wasn't setting any location so when we were emitting the
warning in the following test while instantiating a template, its location
was UNKNOWN_LOCATION.  Rather than adding a location_t parameter, let's use
the location from the original expression.

	* tree.c (build_min_non_dep): Use the location of NON_DEP when
	building the expression.

	* g++.dg/diagnostic/enum1.C: New test.
	* g++.dg/gomp/loop-2.C: Adjust dg-error.
	* g++.dg/gomp/for-21.C: Likewise.

From-SVN: r279685

gcc/cp/ChangeLog

+2019-12-19  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/92974 - bogus location for enum and non-enum in ?: warning.
+	* tree.c (build_min_non_dep): Use the location of NON_DEP when
+	building the expression.
+
 2019-12-20  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/92965

gcc/cp/tree.c

@@ -3356,6 +3356,7 @@ build_min_non_dep (enum tree_code code, tree non_dep, ...)
     non_dep = TREE_OPERAND (non_dep, 0);
 
   t = make_node (code);
+  SET_EXPR_LOCATION (t, cp_expr_loc_or_input_loc (non_dep));
   length = TREE_CODE_LENGTH (code);
   TREE_TYPE (t) = unlowered_expr_type (non_dep);
   TREE_SIDE_EFFECTS (t) = TREE_SIDE_EFFECTS (non_dep);

gcc/testsuite/ChangeLog

+2019-12-19  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/92974 - bogus location for enum and non-enum in ?: warning.
+	* g++.dg/diagnostic/enum1.C: New test.
+	* g++.dg/gomp/loop-2.C: Adjust dg-error.
+	* g++.dg/gomp/for-21.C: Likewise.
+
 2019-12-20  Jakub Jelinek  <jakub@redhat.com>
 
 	PR c++/92965

gcc/testsuite/g++.dg/diagnostic/enum1.C

+// PR c++/92974 - bogus location for enum and non-enum in ?: warning.
+// { dg-options "-Wextra" }
+
+enum { X };
+
+struct S { 
+  template <typename T>
+  void f(T) { unsigned int g(X ?: g); } // { dg-warning "enumerated and non-enumerated type in conditional expression" }
+};
+
+struct S2 { 
+  S m;
+  void l() { m.f(1); }
+};

gcc/testsuite/g++.dg/gomp/for-21.C

@@ -34,8 +34,8 @@ void
 f4 (int a[10][10])
 {
   #pragma omp for collapse (2)
-  for (int i = 0; i < 10; ++i)		// { dg-error "initializer expression refers to iteration variable 'i'" }
-    for (auto j : a[i])
+  for (int i = 0; i < 10; ++i)
+    for (auto j : a[i])		// { dg-error "initializer expression refers to iteration variable 'i'" }
       ;
 }
 

gcc/testsuite/g++.dg/gomp/loop-2.C

@@ -87,16 +87,16 @@ f1 (int x)
     for (j = baz (&i); j < 16; j += 2) /* { dg-error "initializer expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
-  for (i = 0; i < 16; i++) /* { dg-error "condition expression refers to iteration variable" } */
-    for (j = 16; j > (i & x); j--)
+  for (i = 0; i < 16; i++)
+    for (j = 16; j > (i & x); j--) /* { dg-error "condition expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
-  for (i = 0; i < 16; i++) /* { dg-error "condition expression refers to iteration variable" } */
-    for (j = 0; j < i; j++)
+  for (i = 0; i < 16; i++)
+    for (j = 0; j < i; j++) /* { dg-error "condition expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
-  for (i = 0; i < 16; i++) /* { dg-error "condition expression refers to iteration variable" } */
-    for (j = 0; j < i + 4; j++)
+  for (i = 0; i < 16; i++)
+    for (j = 0; j < i + 4; j++) /* { dg-error "condition expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
   for (i = 0; i < j + 4; i++) /* { dg-error "condition expression refers to iteration variable" } */
@@ -111,8 +111,8 @@ f1 (int x)
     for (j = 0; j < 16; j++)
       ;
   #pragma omp for collapse(2)
-  for (i = 0; i < 16; i++) /* { dg-error "condition expression refers to iteration variable" } */
-    for (j = 0; j < baz (&i); j++)
+  for (i = 0; i < 16; i++)
+    for (j = 0; j < baz (&i); j++) /* { dg-error "condition expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
   for (i = 0; i < 16; i += j) /* { dg-error "increment expression refers to iteration variable" } */
@@ -221,20 +221,20 @@ f2 (int x)
     for (int j = baz (&i); j < 16; j += 2) /* { dg-error "initializer expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
-  for (int i = 0; i < 16; i++) /* { dg-error "condition expression refers to iteration variable" } */
-    for (int j = 16; j > (i & x); j--)
+  for (int i = 0; i < 16; i++)
+    for (int j = 16; j > (i & x); j--) /* { dg-error "condition expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
-  for (int i = 0; i < 16; i++) /* { dg-error "condition expression refers to iteration variable" } */
-    for (int j = 0; j < i; j++)
+  for (int i = 0; i < 16; i++)
+    for (int j = 0; j < i; j++) /* { dg-error "condition expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
-  for (int i = 0; i < 16; i++) /* { dg-error "condition expression refers to iteration variable" } */
-    for (int j = 0; j < i + 4; j++)
+  for (int i = 0; i < 16; i++)
+    for (int j = 0; j < i + 4; j++) /* { dg-error "condition expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
-  for (int i = 0; i < 16; i++) /* { dg-error "condition expression refers to iteration variable" } */
-    for (int j = 0; j < baz (&i); j++)
+  for (int i = 0; i < 16; i++)
+    for (int j = 0; j < baz (&i); j++) /* { dg-error "condition expression refers to iteration variable" } */
       ;
   #pragma omp for collapse(2)
   for (int i = 0; i < 16; i++) /* { dg-error "increment expression refers to iteration variable" } */