static llvm::Constant *tryCaptureAsConstant(CodeGenModule &CGM,
CodeGenFunction *CGF,
const VarDecl *var) {
+ // Don't rematerialize default arguments of function parameters.
+ if (auto *PD = dyn_cast<ParmVarDecl>(var))
+ if (PD->hasDefaultArg())
+ return nullptr;
+
QualType type = var->getType();
// We can only do this if the variable is const.
--- /dev/null
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10.0.0 -emit-llvm -o - %s -std=c++11 -fblocks -fobjc-arc | FileCheck %s
+
+// CHECK: define internal void @___Z16test_default_argi_block_invoke(i8* %[[BLOCK_DESCRIPTOR:.*]])
+// CHECK: %[[BLOCK:.*]] = bitcast i8* %[[BLOCK_DESCRIPTOR]] to <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>*
+// CHECK: %[[BLOCK_CAPTURE_ADDR:.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>, <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, i32 }>* %[[BLOCK]], i32 0, i32 5
+// CHECK: %[[V0:.*]] = load i32, i32* %[[BLOCK_CAPTURE_ADDR]]
+// CHECK: call void @_Z4foo1i(i32 %[[V0]])
+
+void foo1(int);
+
+void test_default_arg(const int a = 42) {
+ auto block = ^{
+ foo1(a);
+ };
+ block();
+}