Hi rnk, eliben,
In SemaCUDA all implicit functions were considered device host, this led to
errors such as the following code snippet failing to compile:
```
struct Copyable {
const Copyable& operator=(const Copyable& x) { return *this; }
};
struct Simple {
Copyable b;
};
void foo() {
Simple a, b;
a = b;
}
```
Above the implicit copy assignment operator was inferred as host device but
there was only a host assignment copy defined which is an error in device
compilation mode.
http://reviews.llvm.org/D6565
Files:
lib/Sema/SemaCUDA.cpp
test/SemaCUDA/implicit-copy.cu
Index: lib/Sema/SemaCUDA.cpp
===================================================================
--- lib/Sema/SemaCUDA.cpp
+++ lib/Sema/SemaCUDA.cpp
@@ -51,9 +51,9 @@
return CFT_Device;
} else if (D->hasAttr<CUDAHostAttr>()) {
return CFT_Host;
- } else if (D->isImplicit()) {
- // Some implicit declarations (like intrinsic functions) are not marked.
- // Set the most lenient target on them for maximal flexibility.
+ } else if (D->isImplicit() && D->getBuiltinID()) {
+ // Intrinsic functions cannot (at present) be marked as __device__ so set
+ // the most lenient target on them for maximal flexibility.
return CFT_HostDevice;
}
Index: test/SemaCUDA/implicit-copy.cu
===================================================================
--- test/SemaCUDA/implicit-copy.cu
+++ test/SemaCUDA/implicit-copy.cu
@@ -0,0 +1,16 @@
+// RUN: %clang_cc1 -std=gnu++11 -triple nvptx64-unknown-unknown -fcuda-is-device -fsyntax-only -verify %s
+
+struct Copyable {
+ const Copyable& operator=(const Copyable& x) { return *this; }
+};
+
+struct Simple {
+ Copyable b;
+};
+
+// expected-no-diagnostics
+void foo() {
+ Simple a, b;
+
+ a = b;
+}
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