Add a spelling of pass_object_size that uses __builtin_dynamic_object_size

The attribute pass_dynamic_object_size(n) behaves exactly like
pass_object_size(n), but instead of evaluating __builtin_object_size on calls,
it evaluates __builtin_dynamic_object_size, which has the potential to produce
runtime code when the object size can't be determined statically.

Differential revision: https://reviews.llvm.org/D58757

llvm-svn: 356515

1 files changed, 1 insertions, 1 deletions

diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index 626578ad84f..73a87a4933d 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -3452,7 +3452,7 @@ void CodeGenFunction::EmitCallArgs(
     assert(EmittedArg.getScalarVal() && "We emitted nothing for the arg?");
     llvm::Value *V = evaluateOrEmitBuiltinObjectSize(Arg, PS->getType(), T,
                                                      EmittedArg.getScalarVal(),
-                                                     /*IsDynamic=*/false);
+                                                     PS->isDynamic());
     Args.add(RValue::get(V), SizeTy);
     // If we're emitting args in reverse, be sure to do so with
     // pass_object_size, as well.