Fix issue with tan while inlining cmath functions

Change-Id: Ie5420c27981a7ee143432b83244223a48bdd4f5e

Author: doru1004

clang/lib/Headers/openmp_wrappers/cmath

@@ -79,13 +79,59 @@ __DEVICE__ float tgamma(float __x) { return ::tgammaf(__x); }
 #endif // __NVPTX__
 
 #ifdef __AMDGCN__
-#pragma omp begin declare variant match(                                       \
-    device = {arch(amdgcn)}, implementation = {extension(match_any, allow_templates)})
+#pragma omp begin declare variant match(device = {arch(amdgcn)})
+
+#pragma push_macro("__constant__")
+#define __constant__ __attribute__((constant))
+
 #define __HIP__
 #define __OPENMP_AMDGCN__
+
 #include <__clang_hip_cmath.h>
+
+#pragma pop_macro("__constant__")
+#undef __OPENMP_AMDGCN__
 #undef __HIP__
 
+// Define overloads otherwise which are absent
+#define __DEVICE__ static constexpr __attribute__((always_inline, nothrow))
+
+__DEVICE__ float acos(float __x) { return ::acosf(__x); }
+__DEVICE__ float acosh(float __x) { return ::acoshf(__x); }
+__DEVICE__ float asin(float __x) { return ::asinf(__x); }
+__DEVICE__ float asinh(float __x) { return ::asinhf(__x); }
+__DEVICE__ float atan(float __x) { return ::atanf(__x); }
+__DEVICE__ float atan2(float __x, float __y) { return ::atan2f(__x, __y); }
+__DEVICE__ float atanh(float __x) { return ::atanhf(__x); }
+__DEVICE__ float cbrt(float __x) { return ::cbrtf(__x); }
+__DEVICE__ float cosh(float __x) { return ::coshf(__x); }
+__DEVICE__ float erf(float __x) { return ::erff(__x); }
+__DEVICE__ float erfc(float __x) { return ::erfcf(__x); }
+__DEVICE__ float exp2(float __x) { return ::exp2f(__x); }
+__DEVICE__ float expm1(float __x) { return ::expm1f(__x); }
+__DEVICE__ float fdim(float __x, float __y) { return ::fdimf(__x, __y); }
+__DEVICE__ float hypot(float __x, float __y) { return ::hypotf(__x, __y); }
+__DEVICE__ int ilogb(float __x) { return ::ilogbf(__x); }
+__DEVICE__ float ldexp(float __arg, int __exp) {
+  return ::ldexpf(__arg, __exp);
+}
+__DEVICE__ float lgamma(float __x) { return ::lgammaf(__x); }
+__DEVICE__ float log1p(float __x) { return ::log1pf(__x); }
+__DEVICE__ float logb(float __x) { return ::logbf(__x); }
+__DEVICE__ float nextafter(float __x, float __y) {
+  return ::nextafterf(__x, __y);
+}
+__DEVICE__ float remainder(float __x, float __y) {
+  return ::remainderf(__x, __y);
+}
+__DEVICE__ float scalbn(float __x, int __y) { return ::scalbnf(__x, __y); }
+__DEVICE__ float sinh(float __x) { return ::sinhf(__x); }
+__DEVICE__ float tan(float __x) { return ::tanf(__x); }
+__DEVICE__ float tanh(float __x) { return ::tanhf(__x); }
+__DEVICE__ float tgamma(float __x) { return ::tgammaf(__x); }
+
+#undef __DEVICE__
+
 #pragma omp end declare variant
 #endif // __AMDGCN__