Index: clang/trunk/unittests/AST/ASTImporterTest.cpp
===================================================================
--- clang/trunk/unittests/AST/ASTImporterTest.cpp
+++ clang/trunk/unittests/AST/ASTImporterTest.cpp
@@ -4048,8 +4048,9 @@
     auto *ToD = LastDeclMatcher<DeclTy>().match(ToTU, getPattern());
     EXPECT_TRUE(ImportedD == ToD);
     EXPECT_FALSE(ToD->isThisDeclarationADefinition());
-    if (auto *ToT = dyn_cast<TemplateDecl>(ToD))
+    if (auto *ToT = dyn_cast<TemplateDecl>(ToD)) {
       EXPECT_TRUE(ToT->getTemplatedDecl());
+    }
   }
 
   void TypedTest_DefinitionShouldBeImportedAsADefinition() {
@@ -4063,8 +4064,9 @@
     EXPECT_EQ(DeclCounter<DeclTy>().match(ToTU, getPattern()), 1u);
     auto *ToD = LastDeclMatcher<DeclTy>().match(ToTU, getPattern());
     EXPECT_TRUE(ToD->isThisDeclarationADefinition());
-    if (auto *ToT = dyn_cast<TemplateDecl>(ToD))
+    if (auto *ToT = dyn_cast<TemplateDecl>(ToD)) {
       EXPECT_TRUE(ToT->getTemplatedDecl());
+    }
   }
 
   void TypedTest_ImportPrototypeAfterImportedPrototype() {
@@ -4177,8 +4179,9 @@
     auto *To0 = FirstDeclMatcher<DeclTy>().match(ToTU, getPattern());
     EXPECT_TRUE(Imported0 == To0);
     EXPECT_TRUE(To0->isThisDeclarationADefinition());
-    if (auto *ToT0 = dyn_cast<TemplateDecl>(To0))
+    if (auto *ToT0 = dyn_cast<TemplateDecl>(To0)) {
       EXPECT_TRUE(ToT0->getTemplatedDecl());
+    }
   }
 
   void TypedTest_ImportDefinitionThenPrototype() {
Index: clang/trunk/unittests/Tooling/LookupTest.cpp
===================================================================
--- clang/trunk/unittests/Tooling/LookupTest.cpp
+++ clang/trunk/unittests/Tooling/LookupTest.cpp
@@ -217,8 +217,9 @@
   // `x::y::Foo` in c.cc [1], it should not make "Foo" at [0] ambiguous because
   // it's not visible at [0].
   Visitor.OnRecordTypeLoc = [&](RecordTypeLoc Type) {
-    if (Type.getDecl()->getQualifiedNameAsString() == "x::y::Old")
+    if (Type.getDecl()->getQualifiedNameAsString() == "x::y::Old") {
       EXPECT_EQ("Foo", replaceRecordTypeLoc(Type, "::x::Foo"));
+    }
   };
   Visitor.runOver(R"(
     // a.h
Index: lld/trunk/ELF/LinkerScript.cpp
===================================================================
--- lld/trunk/ELF/LinkerScript.cpp
+++ lld/trunk/ELF/LinkerScript.cpp
@@ -887,8 +887,8 @@
     // in case it is empty.
     bool IsEmpty = getInputSections(Sec).empty();
     if (IsEmpty)
-      Sec->Flags =
-          Flags & ((Sec->NonAlloc ? 0 : SHF_ALLOC) | SHF_WRITE | SHF_EXECINSTR);
+      Sec->Flags = Flags & ((Sec->NonAlloc ? SHF_NONE : SHF_ALLOC) | SHF_WRITE |
+                            SHF_EXECINSTR);
 
     if (IsEmpty && isDiscardable(*Sec)) {
       Sec->Live = false;
Index: llvm/trunk/include/llvm/BinaryFormat/ELF.h
===================================================================
--- llvm/trunk/include/llvm/BinaryFormat/ELF.h
+++ llvm/trunk/include/llvm/BinaryFormat/ELF.h
@@ -875,6 +875,8 @@
 
 // Section flags.
 enum : unsigned {
+  SHF_NONE,
+
   // Section data should be writable during execution.
   SHF_WRITE = 0x1,
 
Index: llvm/trunk/lib/Target/AMDGPU/R600ISelLowering.cpp
===================================================================
--- llvm/trunk/lib/Target/AMDGPU/R600ISelLowering.cpp
+++ llvm/trunk/lib/Target/AMDGPU/R600ISelLowering.cpp
@@ -1714,6 +1714,10 @@
 
     if (NewBldVec[i].isUndef())
       continue;
+    // Fix spurious warning with gcc 7.3 -O3 for NewBldVec[i] below
+    // warning: array subscript is above array bounds [-Warray-bounds]
+    if (i >= 4)
+      continue;
     for (unsigned j = 0; j < i; j++) {
       if (NewBldVec[i] == NewBldVec[j]) {
         NewBldVec[i] = DAG.getUNDEF(NewBldVec[i].getValueType());
Index: llvm/trunk/unittests/IR/ConstantRangeTest.cpp
===================================================================
--- llvm/trunk/unittests/IR/ConstantRangeTest.cpp
+++ llvm/trunk/unittests/IR/ConstantRangeTest.cpp
@@ -395,6 +395,10 @@
           }
         }
 
+#if defined(__GNUC__) && __GNUC__ >= 7
+        // Silence warning: variable 'HaveInterrupt3' set but not used
+        (void)&HaveInterrupt3;
+#endif
         assert(!HaveInterrupt3 && "Should have at most three ranges");
 
         ConstantRange SmallestCR = OpFn(CR1, CR2, ConstantRange::Smallest);
Index: llvm/trunk/unittests/Support/TypeTraitsTest.cpp
===================================================================
--- llvm/trunk/unittests/Support/TypeTraitsTest.cpp
+++ llvm/trunk/unittests/Support/TypeTraitsTest.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/Support/type_traits.h"
+#include "gtest/gtest.h"
 
 namespace {
 
@@ -71,6 +72,26 @@
 template void TrivialityTester<A &&, false, true>();
 template void TrivialityTester<B &&, false, true>();
 
+TEST(Triviality, Tester) {
+  TrivialityTester<int, true, true>();
+  TrivialityTester<void *, true, true>();
+  TrivialityTester<int &, true, true>();
+  TrivialityTester<int &&, false, true>();
+
+  TrivialityTester<X, true, true>();
+  TrivialityTester<Y, false, false>();
+  TrivialityTester<Z, false, false>();
+  TrivialityTester<A, true, false>();
+  TrivialityTester<B, false, true>();
+
+  TrivialityTester<Z &, true, true>();
+  TrivialityTester<A &, true, true>();
+  TrivialityTester<B &, true, true>();
+  TrivialityTester<Z &&, false, true>();
+  TrivialityTester<A &&, false, true>();
+  TrivialityTester<B &&, false, true>();
+}
+
 } // namespace triviality
 
 } // end anonymous namespace
Index: llvm/trunk/unittests/Transforms/Scalar/CMakeLists.txt
===================================================================
--- llvm/trunk/unittests/Transforms/Scalar/CMakeLists.txt
+++ llvm/trunk/unittests/Transforms/Scalar/CMakeLists.txt
@@ -10,3 +10,8 @@
 add_llvm_unittest(ScalarTests
   LoopPassManagerTest.cpp
   )
+
+# Workaround for the gcc 6.1 bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80916.
+if (CMAKE_COMPILER_IS_GNUCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 6.1)
+  set_source_files_properties(LoopPassManagerTest.cpp PROPERTIES COMPILE_FLAGS -Wno-unused-function)
+endif()
Index: llvm/trunk/unittests/Transforms/Scalar/LoopPassManagerTest.cpp
===================================================================
--- llvm/trunk/unittests/Transforms/Scalar/LoopPassManagerTest.cpp
+++ llvm/trunk/unittests/Transforms/Scalar/LoopPassManagerTest.cpp
@@ -20,19 +20,9 @@
 #include "llvm/IR/PassManager.h"
 #include "llvm/Support/SourceMgr.h"
 
-// Workaround for the gcc 6.1 bug PR80916.
-#if defined(__GNUC__) && __GNUC__ > 5
-#  pragma GCC diagnostic push
-#  pragma GCC diagnostic ignored "-Wunused-function"
-#endif
-
 #include "gmock/gmock.h"
 #include "gtest/gtest.h"
 
-#if defined(__GNUC__) && __GNUC__ > 5
-#  pragma GCC diagnostic pop
-#endif
-
 using namespace llvm;
 
 namespace {