!46 Fix PR c++/81589 - error with is_trivially_constructible.

From: @jeff200902
Reviewed-by: @haijianzhang
Signed-off-by: @haijianzhang

fix-trivially_constructible-PR81589.patch

@@ -0,0 +1,42 @@
+From 57b9683f0ce55a410c567fcb2dc365a2cc848d6a Mon Sep 17 00:00:00 2001
+From: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date: Mon, 26 Feb 2018 06:09:07 +0000
+Subject: [PATCH] 	PR c++/81589 - error with is_trivially_constructible.
+
+	* method.c (constructible_expr): Set cp_unevaluated.
+
+git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-7-branch@257981 138bc75d-0d04-0410-961f-82ee72b054a4
+---
+ gcc/cp/method.c                                        |  1 +
+ gcc/testsuite/g++.dg/ext/is_trivially_constructible6.C | 10 ++++++++++
+ 2 files changed, 11 insertions(+)
+ create mode 100644 gcc/testsuite/g++.dg/ext/is_trivially_constructible6.C
+
+diff --git a/gcc/cp/method.c b/gcc/cp/method.c
+index 59ad43f73fee..a2d4c071efa3 100644
+--- a/gcc/cp/method.c
++++ b/gcc/cp/method.c
+@@ -1165,6 +1165,7 @@ constructible_expr (tree to, tree from)
+     {
+       tree ctype = to;
+       vec<tree, va_gc> *args = NULL;
++      cp_unevaluated cp_uneval_guard;
+       if (TREE_CODE (to) != REFERENCE_TYPE)
+ 	to = cp_build_reference_type (to, /*rval*/false);
+       tree ob = build_stub_object (to);
+diff --git a/gcc/testsuite/g++.dg/ext/is_trivially_constructible6.C b/gcc/testsuite/g++.dg/ext/is_trivially_constructible6.C
+new file mode 100644
+index 000000000000..10a8dfbb8f0b
+--- /dev/null
++++ b/gcc/testsuite/g++.dg/ext/is_trivially_constructible6.C
+@@ -0,0 +1,10 @@
++// PR c++/81589
++
++template <typename k>
++struct z {
++  z() {
++    k::error;
++  }
++};
++
++int x = __is_trivially_constructible(z<int>);

gcc.spec

@@ -36,7 +36,7 @@
 Summary: Various compilers (C, C++, Objective-C, Java, ...)
 Name: gcc
 Version: 7.3.0
-Release: %{gcc_release}.34
+Release: %{gcc_release}.35
 License: GPLv3+ and GPLv3+ with exceptions and GPLv2+ with exceptions and LGPLv2+ and BSD
 Group: Development/Languages
 #Source0: hcc-aarch64-linux-release.tar.bz2
@@ -84,7 +84,7 @@ Patch29: Big-endian-union-bitfield-bugfix.patch
 Patch31: fstack-clash-protection.patch
 Patch34: mark-pattern-as-clobbering-CC-REGNUM.patch
 Patch35: turn-on-funwind-tables-by-default.patch
-
+Patch36: fix-trivially_constructible-PR81589.patch
 
 #AutoReqProv:    off
 AutoReq: true
@@ -508,6 +508,7 @@ package or when debugging this package.
 %patch31 -p1
 %patch34 -p1
 %patch35 -p1
+%patch36 -p1
 
 %if 0%{?_enable_debug_packages}
 cat > split-debuginfo.sh <<\EOF
@@ -3140,6 +3141,9 @@ fi
 
 
 %changelog
+* Wed Oct 28 2020 jeff200902 <gaojianxing@huawei.com> - 7.3.0-20190804.35
+- fixed PR c++/81589, error with is_trivially_constructible.
+
 * Tue Aug 21 2020 openEuler Buildteam <buildteam@openeuler.org> - 7.3.0-20190804.34
 - Type:rebuild
 - ID:NA