[PATCH] D95840: [CUDA][HIP] Fix checking dependent initalizer

[Yaxun Liu via Phabricator via cfe-commits]

yaxunl created this revision.
yaxunl added a reviewer: tra.
yaxunl requested review of this revision.

Defer constant checking of dependent initializer to template instantiation
since it cannot be done for dependent values.

This is separated from https://reviews.llvm.org/D95560


https://reviews.llvm.org/D95840

Files:
  clang/lib/Sema/SemaCUDA.cpp
  clang/test/SemaCUDA/dependent-device-var.cu


Index: clang/test/SemaCUDA/dependent-device-var.cu
===================================================================
--- /dev/null
+++ clang/test/SemaCUDA/dependent-device-var.cu
@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -fsyntax-only -verify=host,com -x hip %s
+// RUN: %clang_cc1 -fsyntax-only -fcuda-is-device -verify=dev,com -x hip %s
+
+#include "Inputs/cuda.h"
+
+template<typename T>
+__device__ int fun1(T x) {
+  static __device__ int a = sizeof(x);
+  static __device__ int b = x;
+  // com-error at -1 {{dynamic initialization is not supported for __device__, __constant__, __shared__, and __managed__ variables}}
+  return  a + b;
+}
+
+__device__ int fun1_caller() {
+  return fun1(1);
+  // com-note at -1 {{in instantiation of function template specialization 'fun1<int>' requested here}}
+}
Index: clang/lib/Sema/SemaCUDA.cpp
===================================================================
--- clang/lib/Sema/SemaCUDA.cpp
+++ clang/lib/Sema/SemaCUDA.cpp
@@ -530,9 +530,12 @@
     if (!AllowedInit &&
         (VD->hasAttr<CUDADeviceAttr>() || VD->hasAttr<CUDAConstantAttr>())) {
       auto *Init = VD->getInit();
+      // isConstantInitializer cannot be called with dependent value, therefore
+      // we skip checking dependent value here. This is OK since
+      // checkAllowedCUDAInitializer is called again when the template is
+      // instantiated.
       AllowedInit =
-          ((VD->getType()->isDependentType() || Init->isValueDependent()) &&
-           VD->isConstexpr()) ||
+          (VD->getType()->isDependentType() || Init->isValueDependent()) ||
           Init->isConstantInitializer(Context,
                                       VD->getType()->isReferenceType());
     }


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