[HIP] Add support functions for C++ polymorphic types

[scchan]

Summary

Add runtime functions to detect invalid calls to pure or deleted virtual
functions

[yaxunl]

can you add a test to https://github.com/llvm/llvm-project/blob/main/clang/test/Headers/hip-header.hip

[scchan]

Adding test

[yaxunl]

LGTM. Thanks! pls remove the extra line when committing.

clang/test/Headers/hip-header.hip

87

extrac line

[scchan]

Minor clean up in the hip-header.hip test

clang/lib/Headers/__clang_hip_runtime_wrapper.h

 #define __shared__ __attribute__((shared))
 #define __constant__ __attribute__((constant))
 #define __managed__ __attribute__((managed))
 
 #if !defined(__cplusplus) || __cplusplus < 201103L
   #define nullptr NULL;
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+  __attribute__((__visibility__("default")))
+  __attribute__((weak))
+  __attribute__((noreturn))
+  __device__ void __cxa_pure_virtual(void) {
+    __builtin_trap();
+  }
+  __attribute__((__visibility__("default")))
+  __attribute__((weak))
+  __attribute__((noreturn))
+  __device__ void __cxa_deleted_virtual(void) {
+    __builtin_trap();
+  }
+}
+#endif //__cplusplus
+
 #if __HIP_ENABLE_DEVICE_MALLOC__
 extern "C" __device__ void *__hip_malloc(size_t __size);
 extern "C" __device__ void *__hip_free(void *__ptr);
 static inline __device__ void *malloc(size_t __size) {
   return __hip_malloc(__size);
 }
 static inline __device__ void *free(void *__ptr) { return __hip_free(__ptr); }
 #else

clang/test/Headers/hip-header.hip

 // REQUIRES: amdgpu-registered-target
 // RUN: %clang_cc1 -include __clang_hip_runtime_wrapper.h \
 // RUN:   -internal-isystem %S/../../lib/Headers/cuda_wrappers \
 // RUN:   -internal-isystem %S/Inputs/include \
 // RUN:   -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-unknown \
 // RUN:   -target-cpu gfx906 -emit-llvm %s -fcuda-is-device -o - \
 // RUN:   -D__HIPCC_RTC__ | FileCheck %s
 // RUN: %clang_cc1 -include __clang_hip_runtime_wrapper.h \
 // RUN:   -internal-isystem %S/../../lib/Headers/cuda_wrappers \
 // RUN:   -internal-isystem %S/Inputs/include \
 // RUN:   -triple amdgcn-amd-amdhsa -aux-triple x86_64-unknown-unknown \
 // RUN:   -target-cpu gfx906 -emit-llvm %s -fcuda-is-device -o - \
 // RUN:   -D__HIPCC_RTC__ -std=c++14 | FileCheck -check-prefixes=CHECK,CXX14 %s
 
 // expected-no-diagnostics
 
+// Check support for pure and deleted virtual functions
+struct base {
+  __host__
+  __device__
+  virtual void pv() = 0;
+  __host__
+  __device__
+  virtual void dv() = delete;
+};
+struct derived:base {
+  __host__
+  __device__
+  virtual void pv() override {};
+};
+__device__ void test_vf() {
+    derived d;
+}
+// CHECK: @_ZTV7derived = linkonce_odr unnamed_addr addrspace(1) constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* null, i8* bitcast (void (%struct.derived*)* @_ZN7derived2pvEv to i8*), i8* bitcast (void ()* @__cxa_deleted_virtual to i8*)] }, comdat, align 8
+// CHECK: @_ZTV4base = linkonce_odr unnamed_addr addrspace(1) constant { [4 x i8*] } { [4 x i8*] [i8* null, i8* null, i8* bitcast (void ()* @__cxa_pure_virtual to i8*), i8* bitcast (void ()* @__cxa_deleted_virtual to i8*)] }, comdat, align 8
+
+// CHECK: define{{.*}}void @__cxa_pure_virtual()
+// CHECK: define{{.*}}void @__cxa_deleted_virtual()
+
 struct Number {
   __device__ Number(float _x) : x(_x) {}
   float x;
 };
 
 #if __cplusplus >= 201103L
 // Check __hip::__numeric_type can be used with a class without default ctor.
 __device__ void test_numeric_type() {

 __device__ float test_floor() {
   return floor(5);
 }
 
 // CHECK-LABEL: define{{.*}}@_Z8test_maxv
 // CHECK: call {{.*}}double @__ocml_fmax_f64(double {{.*}}, double
 __device__ float test_max() {
   return max(5, 6.0);
 }