Fix mangling numbers for varargs lambdas; varargs and non-varargs lambdas get

different lambda-sigs, so they should have different counters.

llvm-svn: 284933

2 files changed, 13 insertions, 2 deletions

diff --git a/clang/lib/AST/ItaniumCXXABI.cpp b/clang/lib/AST/ItaniumCXXABI.cpp
index 482c3c5d338..091d5f031f8 100644
--- a/clang/lib/AST/ItaniumCXXABI.cpp
+++ b/clang/lib/AST/ItaniumCXXABI.cpp
@@ -63,9 +63,10 @@ public:
         CallOperator->getType()->getAs<FunctionProtoType>();
     ASTContext &Context = CallOperator->getASTContext();
 
+    FunctionProtoType::ExtProtoInfo EPI;
+    EPI.Variadic = Proto->isVariadic();
     QualType Key =
-        Context.getFunctionType(Context.VoidTy, Proto->getParamTypes(),
-                                FunctionProtoType::ExtProtoInfo());
+        Context.getFunctionType(Context.VoidTy, Proto->getParamTypes(), EPI);
     Key = Context.getCanonicalType(Key);
     return ++ManglingNumbers[Key->castAs<FunctionProtoType>()];
   }
diff --git a/clang/test/CodeGenCXX/mangle-lambdas.cpp b/clang/test/CodeGenCXX/mangle-lambdas.cpp
index 051cfdc3a22..15987ebe46b 100644
--- a/clang/test/CodeGenCXX/mangle-lambdas.cpp
+++ b/clang/test/CodeGenCXX/mangle-lambdas.cpp
@@ -173,6 +173,16 @@ namespace PR12123 {
 
 // CHECK-LABEL: define linkonce_odr dereferenceable({{[0-9]+}}) %"struct.PR12123::A"* @_ZZN7PR121231B1fERKSt9type_infoEd_NKUlvE_clEv
 
+// CHECK-LABEL: define {{.*}} @_Z{{[0-9]*}}testVarargsLambdaNumberingv(
+inline int testVarargsLambdaNumbering() {
+  // CHECK: testVarargsLambdaNumberingvE{{.*}}UlzE_
+  auto a = [](...) { static int n; return ++n; };
+  // CHECK: testVarargsLambdaNumberingvE{{.*}}UlvE_
+  auto b = []() { static int n; return ++n; };
+  return a() + b();
+}
+int k = testVarargsLambdaNumbering();
+
 // Check linkage of the various lambdas.
 // CHECK-LABEL: define linkonce_odr i32 @_ZZ11inline_funciENKUlvE_clEv
 // CHECK: ret i32 1