[SYCL] Enable -fdeclare-spirv-builtins for SYCL device compilation mode

For device compilation, SPIR-V builtins are now looked up by
the device compiler. They now longer need to be forward declared.

Signed-off-by: Victor Lomuller <victor@codeplay.com>

Author: Victor Lomuller

clang/lib/Driver/ToolChains/Clang.cpp

@@ -4086,6 +4086,7 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
     // We want to compile sycl kernels.
     CmdArgs.push_back("-fsycl");
     CmdArgs.push_back("-fsycl-is-device");
+    CmdArgs.push_back("-fdeclare-spirv-builtins");
     // Pass the triple of host when doing SYCL
     auto AuxT = llvm::Triple(llvm::sys::getProcessTriple());
     std::string NormalizedTriple = AuxT.normalize();

libdevice/device_math.h

@@ -11,114 +11,6 @@
 
 #include "device.h"
 
-DEVICE_EXTERNAL double __spirv_ocl_log(double);
-DEVICE_EXTERNAL double __spirv_ocl_sin(double);
-DEVICE_EXTERNAL double __spirv_ocl_cos(double);
-DEVICE_EXTERNAL double __spirv_ocl_sinh(double);
-DEVICE_EXTERNAL double __spirv_ocl_cosh(double);
-DEVICE_EXTERNAL double __spirv_ocl_tanh(double);
-DEVICE_EXTERNAL double __spirv_ocl_exp(double);
-DEVICE_EXTERNAL double __spirv_ocl_sqrt(double);
-DEVICE_EXTERNAL bool __spirv_IsInf(double);
-DEVICE_EXTERNAL bool __spirv_IsFinite(double);
-DEVICE_EXTERNAL bool __spirv_IsNan(double);
-DEVICE_EXTERNAL bool __spirv_IsNormal(double);
-DEVICE_EXTERNAL bool __spirv_SignBitSet(double);
-DEVICE_EXTERNAL double __spirv_ocl_hypot(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_atan2(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_pow(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_ldexp(double, int);
-DEVICE_EXTERNAL double __spirv_ocl_copysign(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_fmax(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_fabs(double);
-DEVICE_EXTERNAL double __spirv_ocl_tan(double);
-DEVICE_EXTERNAL double __spirv_ocl_acos(double);
-DEVICE_EXTERNAL double __spirv_ocl_asin(double);
-DEVICE_EXTERNAL double __spirv_ocl_atan(double);
-DEVICE_EXTERNAL double __spirv_ocl_atan2(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_cosh(double);
-DEVICE_EXTERNAL double __spirv_ocl_sinh(double);
-DEVICE_EXTERNAL double __spirv_ocl_tanh(double);
-DEVICE_EXTERNAL double __spirv_ocl_acosh(double);
-DEVICE_EXTERNAL double __spirv_ocl_asinh(double);
-DEVICE_EXTERNAL double __spirv_ocl_atanh(double);
-DEVICE_EXTERNAL double __spirv_ocl_frexp(double, int *);
-DEVICE_EXTERNAL double __spirv_ocl_log10(double);
-DEVICE_EXTERNAL double __spirv_ocl_modf(double, double *);
-DEVICE_EXTERNAL double __spirv_ocl_exp2(double);
-DEVICE_EXTERNAL double __spirv_ocl_expm1(double);
-DEVICE_EXTERNAL int __spirv_ocl_ilogb(double);
-DEVICE_EXTERNAL double __spriv_ocl_log1p(double);
-DEVICE_EXTERNAL double __spirv_ocl_log2(double);
-DEVICE_EXTERNAL double __spirv_ocl_logb(double);
-DEVICE_EXTERNAL double __spirv_ocl_sqrt(double);
-DEVICE_EXTERNAL double __spirv_ocl_cbrt(double);
-DEVICE_EXTERNAL double __spirv_ocl_hypot(double);
-DEVICE_EXTERNAL double __spirv_ocl_erf(double);
-DEVICE_EXTERNAL double __spirv_ocl_erfc(double);
-DEVICE_EXTERNAL double __spirv_ocl_tgamma(double);
-DEVICE_EXTERNAL double __spirv_ocl_lgamma(double);
-DEVICE_EXTERNAL double __spirv_ocl_fmod(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_remainder(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_remquo(double, double, int *);
-DEVICE_EXTERNAL double __spirv_ocl_nextafter(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_fdim(double, double);
-DEVICE_EXTERNAL double __spirv_ocl_fma(double, double, double);
-
-DEVICE_EXTERNAL float __spirv_ocl_log(float);
-DEVICE_EXTERNAL float __spirv_ocl_logb(float);
-DEVICE_EXTERNAL float __spirv_ocl_sin(float);
-DEVICE_EXTERNAL float __spirv_ocl_cos(float);
-DEVICE_EXTERNAL float __spirv_ocl_sinh(float);
-DEVICE_EXTERNAL float __spirv_ocl_cosh(float);
-DEVICE_EXTERNAL float __spirv_ocl_tanh(float);
-DEVICE_EXTERNAL float __spirv_ocl_exp(float);
-DEVICE_EXTERNAL float __spirv_ocl_sqrt(float);
-DEVICE_EXTERNAL bool __spirv_IsInf(float);
-DEVICE_EXTERNAL bool __spirv_IsFinite(float);
-DEVICE_EXTERNAL bool __spirv_IsNan(float);
-DEVICE_EXTERNAL bool __spirv_IsNormal(double);
-DEVICE_EXTERNAL bool __spirv_SignBitSet(float);
-DEVICE_EXTERNAL float __spirv_ocl_hypot(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_atan2(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_pow(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_ldexp(float, int);
-DEVICE_EXTERNAL float __spirv_ocl_copysign(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_fmax(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_fabs(float);
-DEVICE_EXTERNAL float __spirv_ocl_tan(float);
-DEVICE_EXTERNAL float __spirv_ocl_acos(float);
-DEVICE_EXTERNAL float __spirv_ocl_asin(float);
-DEVICE_EXTERNAL float __spirv_ocl_atan(float);
-DEVICE_EXTERNAL float __spirv_ocl_atan2(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_cosh(float);
-DEVICE_EXTERNAL float __spirv_ocl_sinh(float);
-DEVICE_EXTERNAL float __spirv_ocl_tanh(float);
-DEVICE_EXTERNAL float __spirv_ocl_acosh(float);
-DEVICE_EXTERNAL float __spirv_ocl_asinh(float);
-DEVICE_EXTERNAL float __spirv_ocl_atanh(float);
-DEVICE_EXTERNAL float __spirv_ocl_frexp(float, int *);
-DEVICE_EXTERNAL float __spirv_ocl_log10(float);
-DEVICE_EXTERNAL float __spirv_ocl_modf(float, float *);
-DEVICE_EXTERNAL float __spirv_ocl_exp2(float);
-DEVICE_EXTERNAL float __spirv_ocl_expm1(float);
-DEVICE_EXTERNAL int __spirv_ocl_ilogb(float);
-DEVICE_EXTERNAL float __spirv_ocl_log1p(float);
-DEVICE_EXTERNAL float __spirv_ocl_log2(float);
-DEVICE_EXTERNAL float __spirv_ocl_sqrt(float);
-DEVICE_EXTERNAL float __spirv_ocl_cbrt(float);
-DEVICE_EXTERNAL float __spirv_ocl_hypot(float);
-DEVICE_EXTERNAL float __spirv_ocl_erf(float);
-DEVICE_EXTERNAL float __spirv_ocl_erfc(float);
-DEVICE_EXTERNAL float __spirv_ocl_tgamma(float);
-DEVICE_EXTERNAL float __spirv_ocl_lgamma(float);
-DEVICE_EXTERNAL float __spirv_ocl_fmod(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_remainder(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_remquo(float, float, int *);
-DEVICE_EXTERNAL float __spirv_ocl_nextafter(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_fdim(float, float);
-DEVICE_EXTERNAL float __spirv_ocl_fma(float, float, float);
-
 DEVICE_EXTERN_C
 double __devicelib_log(double x);