commit da383637848d8583f8fcf3c7ab6323cd32edb4d1
author Richard Smith <richard-llvm@metafoo.co.uk> Mon Aug 15 01:33:41 2016 +0000
committer Richard Smith <richard-llvm@metafoo.co.uk> Mon Aug 15 01:33:41 2016 +0000
tree 4d885c0a704da0aa65c224977143657e01329285
parent 5ec9c58f1394e1232972604d765238594d48fce1

P0217R3: code generation support for decomposition declarations.

llvm-svn: 278642

clang/lib/AST/ASTContext.cpp

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 4b42141..49948a5 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -8721,6 +8721,14 @@
       !VD->evaluateValue())
     return true;
 
+  // Likewise, variables with tuple-like bindings are required if their
+  // bindings have side-effects.
+  if (auto *DD = dyn_cast<DecompositionDecl>(VD))
+    for (auto *BD : DD->bindings())
+      if (auto *BindingVD = BD->getHoldingVar())
+        if (DeclMustBeEmitted(BindingVD))
+          return true;
+
   return false;
 }