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llvm-project/clang/test/Preprocessor/bpf-predefined-macros.c

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[BPF] do not generate predefined macro bpf "DefineStd(Builder, "bpf", Opts)" generates the following three macros: bpf __bpf __bpf__ and the macro "bpf" is due to the fact that the target language is C which allows GNU extensions. The name "bpf" could be easily used as variable name or type field name. For example, in current linux kernel, there are four places where bpf is used as a field name. If the corresponding types are included in bpf program, the compilation error will occur. This patch removed predefined macro "bpf" as well as "__bpf" which is rarely used if used at all. Signed-off-by: Yonghong Song <yhs@fb.com> Differential Revision: https://reviews.llvm.org/D61173 llvm-svn: 359310
2019-04-26 23:35:51 +08:00
// RUN: %clang -E -target bpfel -x c -o - %s | FileCheck %s
// RUN: %clang -E -target bpfeb -x c -o - %s | FileCheck %s
#ifdef __bpf__
int b;
#endif
#ifdef __BPF__
int c;
#endif
#ifdef bpf
int d;
#endif
// CHECK: int b;
// CHECK: int c;
// CHECK-NOT: int d;