Suppress false-positive -Wdeprecated-volatile warning from __is_*_assignable(volatile T&, U).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@374580 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaExprCXX.cpp b/lib/Sema/SemaExprCXX.cpp
index 68fe529..a7d8c50 100644
--- a/lib/Sema/SemaExprCXX.cpp
+++ b/lib/Sema/SemaExprCXX.cpp
@@ -5243,7 +5243,13 @@
Sema::ContextRAII TUContext(Self, Self.Context.getTranslationUnitDecl());
ExprResult Result = Self.BuildBinOp(/*S=*/nullptr, KeyLoc, BO_Assign, &Lhs,
&Rhs);
- if (Result.isInvalid() || SFINAE.hasErrorOccurred())
+ if (Result.isInvalid())
+ return false;
+
+ // Treat the assignment as unused for the purpose of -Wdeprecated-volatile.
+ Self.CheckUnusedVolatileAssignment(Result.get());
+
+ if (SFINAE.hasErrorOccurred())
return false;
if (BTT == BTT_IsAssignable)
diff --git a/test/SemaCXX/deprecated.cpp b/test/SemaCXX/deprecated.cpp
index de9e424..878c602 100644
--- a/test/SemaCXX/deprecated.cpp
+++ b/test/SemaCXX/deprecated.cpp
@@ -178,6 +178,8 @@
n /= 2; // cxx20-warning {{compound assignment to object of volatile-qualified type 'volatile int' is deprecated}}
n %= 42; // cxx20-warning {{compound assignment to object of volatile-qualified type 'volatile int' is deprecated}}
+ (void)__is_trivially_assignable(volatile int&, int); // no warning
+
#if __cplusplus >= 201703L
struct X { int a, b; };
volatile auto [x, y] = X{1, 2}; // cxx20-warning {{volatile qualifier in structured binding declaration is deprecated}}
