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-rw-r--r--clang/lib/Sema/SemaDecl.cpp8
1 files changed, 5 insertions, 3 deletions
diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index e3365b559a7..166bd8ca24e 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -8290,9 +8290,11 @@ Sema::ActOnFunctionDeclarator(Scope *S, Declarator &D, DeclContext *DC,
}
// Variadic functions, other than a *declaration* of printf, are not allowed
- // in device-side CUDA code.
- if (NewFD->isVariadic() && (NewFD->hasAttr<CUDADeviceAttr>() ||
- NewFD->hasAttr<CUDAGlobalAttr>()) &&
+ // in device-side CUDA code, unless someone passed
+ // -fcuda-allow-variadic-functions.
+ if (!getLangOpts().CUDAAllowVariadicFunctions && NewFD->isVariadic() &&
+ (NewFD->hasAttr<CUDADeviceAttr>() ||
+ NewFD->hasAttr<CUDAGlobalAttr>()) &&
!(II && II->isStr("printf") && NewFD->isExternC() &&
!D.isFunctionDefinition())) {
Diag(NewFD->getLocation(), diag::err_variadic_device_fn);
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