[committed] openmp: Fix up handling of DECL_OMP_PRIVATIZED_MEMBER for bit-fields [PR95063]

[Jakub Jelinek]

Hi!

The r11-15 change broke this testcase, as it now asserts type is equal to
the type of the DECL_VALUE_EXPR, but for DECL_OMP_PRIVATIZED_MEMBER artificial
vars mapping to bitfields it wasn't.  Fixed by changing the
DECL_OMP_PRIVATIZED_MEMBER var type in that case.

Bootstrapped/regtested on x86_64-linux and i686-linux, committed to trunk.

2020-05-12  Jakub Jelinek  <jakub@redhat.com>

	PR c++/95063
	* pt.c (tsubst_decl): Deal with DECL_OMP_PRIVATIZED_MEMBER for
	a bit-field.

	* g++.dg/gomp/pr95063.C: New test.

--- gcc/cp/pt.c.jj	2020-05-07 11:10:25.644548337 +0200
+++ gcc/cp/pt.c	2020-05-11 23:16:31.070378604 +0200
@@ -14627,6 +14627,12 @@ tsubst_decl (tree t, tree args, tsubst_f
 		  }
 		if (nop)
 		  ve = build_nop (type, ve);
+		else if (DECL_LANG_SPECIFIC (t)
+			 && DECL_OMP_PRIVATIZED_MEMBER (t)
+			 && TREE_CODE (ve) == COMPONENT_REF
+			 && TREE_CODE (TREE_OPERAND (ve, 1)) == FIELD_DECL
+			 && DECL_BIT_FIELD_TYPE (TREE_OPERAND (ve, 1)) == type)
+		  type = TREE_TYPE (ve);
 		else
 		  gcc_checking_assert (TREE_TYPE (ve) == type);
 		SET_DECL_VALUE_EXPR (r, ve);
--- gcc/testsuite/g++.dg/gomp/pr95063.C.jj	2020-05-11 19:35:30.680174343 +0200
+++ gcc/testsuite/g++.dg/gomp/pr95063.C	2020-05-11 19:34:53.138731112 +0200
@@ -0,0 +1,24 @@
+// PR c++/95063
+
+template <typename T>
+struct S {
+  T a : 12;
+  S () : a(0)
+  {
+#pragma omp for linear(a)
+    for (int k = 0; k < 64; ++k)
+      a++;
+  }
+};
+struct U {
+  int a : 12;
+  U () : a(0)
+  {
+#pragma omp for linear(a)
+    for (int k = 0; k < 64; ++k)
+      a++;
+  }
+};
+
+S<int> s;
+U u;

	Jakub