mirror of
https://github.com/Gericom/teak-llvm.git
synced 2025-06-29 16:29:00 -04:00
931939bf92
When compiling CUDA or OpenMP device code Clang parses header files that expect certain predefined macros from the host architecture. To make this work the compiler passes the host triple via the -aux-triple argument and (until now) pulls in all macros for that "auxiliary triple" unconditionally. However this results in defines like __SSE_MATH__ that will trigger inline assembly making use of the "advertised" target features. See the discussion of D47849 and PR38464 for a detailed explanation of the encountered problems. Instead of blacklisting "known bad" examples this patch starts adding defines that are needed for certain headers like bits/wordsize.h and bits/mathinline.h. The disadvantage of this approach is that it decouples the definitions from their target toolchain. However in my opinion it's more important to keep definitions for one header close together. For one this will include a clear documentation why these particular defines are needed. Furthermore it simplifies maintenance because adding defines for a new header or support for a new aux-triple only needs to touch one piece of code. Differential Revision: https://reviews.llvm.org/D50845 llvm-svn: 340681
32 lines
1.3 KiB
Plaintext
32 lines
1.3 KiB
Plaintext
// Tests that host and target builtins can be used in the same TU,
|
|
// have appropriate host/device attributes and that CUDA call
|
|
// restrictions are enforced. Also verify that non-target builtins can
|
|
// be used from both host and device functions.
|
|
//
|
|
// REQUIRES: x86-registered-target
|
|
// REQUIRES: nvptx-registered-target
|
|
// RUN: %clang_cc1 -triple x86_64-unknown-unknown \
|
|
// RUN: -aux-triple nvptx64-unknown-cuda \
|
|
// RUN: -fsyntax-only -verify %s
|
|
// RUN: %clang_cc1 -triple nvptx64-unknown-cuda -fcuda-is-device \
|
|
// RUN: -aux-triple x86_64-unknown-unknown \
|
|
// RUN: -fsyntax-only -verify %s
|
|
|
|
#if !defined(__x86_64__)
|
|
#error "Expected to see preprocessor macros from the host."
|
|
#endif
|
|
|
|
void hf() {
|
|
int x = __builtin_ia32_rdtsc();
|
|
int y = __nvvm_read_ptx_sreg_tid_x(); // expected-note {{'__nvvm_read_ptx_sreg_tid_x' declared here}}
|
|
// expected-error@-1 {{reference to __device__ function '__nvvm_read_ptx_sreg_tid_x' in __host__ function}}
|
|
x = __builtin_abs(1);
|
|
}
|
|
|
|
__attribute__((device)) void df() {
|
|
int x = __nvvm_read_ptx_sreg_tid_x();
|
|
int y = __builtin_ia32_rdtsc(); // expected-error {{reference to __host__ function '__builtin_ia32_rdtsc' in __device__ function}}
|
|
// expected-note@20 {{'__builtin_ia32_rdtsc' declared here}}
|
|
x = __builtin_abs(1);
|
|
}
|