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[OpenMP][libomp] Fix fallthrough attribute detection for Intel compilers

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icc does not properly detect lack of fallthrough attribute since it
defines __GNU__ > 7 and also icc's __has_cpp_attribute/__has_attribute
feature detectors do not properly detect the lack of fallthrough attribute.

Differential Revision: https://reviews.llvm.org/D126001
This commit is contained in:
Jonathan Peyton 2022-05-19 12:17:43 -05:00
parent b7d3ba4bdb
commit 28c8da2965
2 changed files with 6 additions and 0 deletions
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3
openmp/runtime/src/kmp_os.h
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@ -345,6 +345,9 @@ extern "C" {
// Use a function like macro to imply that it must be followed by a semicolon
#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
#define KMP_FALLTHROUGH() [[fallthrough]]
// icc cannot properly tell this attribute is absent so force off
#elif KMP_COMPILER_ICC
#define KMP_FALLTHROUGH() ((void)0)
#elif __has_cpp_attribute(clang::fallthrough)
#define KMP_FALLTHROUGH() [[clang::fallthrough]]
#elif __has_attribute(fallthrough) || __GNUC__ >= 7

3
openmp/tools/archer/ompt-tsan.cpp
View File

@ -42,6 +42,9 @@
// Use a function like macro to imply that it must be followed by a semicolon
#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
#define KMP_FALLTHROUGH() [[fallthrough]]
// icc cannot properly tell this attribute is absent so force off
#elif defined(__INTEL_COMPILER)
#define KMP_FALLTHROUGH() ((void)0)
#elif __has_cpp_attribute(clang::fallthrough)
#define KMP_FALLTHROUGH() [[clang::fallthrough]]
#elif __has_attribute(fallthrough) || __GNUC__ >= 7