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Don't use clang's __builtin_assume as an optimizer hint (#608)

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Fixes #607.

Drive-by: use '?:' to contextually convert to bool in the fallback definition of `GSL_ASSUME`
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Casey Carter 2018-02-11 12:16:39 -08:00 committed by Neil MacIntosh
parent c23d17a61a
commit 95da2fd337
1 changed files with 1 additions and 3 deletions
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4
include/gsl/gsl_assert
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@ -52,12 +52,10 @@
// //
#ifdef _MSC_VER #ifdef _MSC_VER
#define GSL_ASSUME(cond) __assume(cond) #define GSL_ASSUME(cond) __assume(cond)
#elif defined(__clang__)
#define GSL_ASSUME(cond) __builtin_assume(cond)
#elif defined(__GNUC__) #elif defined(__GNUC__)
#define GSL_ASSUME(cond) ((cond) ? static_cast<void>(0) : __builtin_unreachable()) #define GSL_ASSUME(cond) ((cond) ? static_cast<void>(0) : __builtin_unreachable())
#else #else
#define GSL_ASSUME(cond) static_cast<void>(!!(cond)) #define GSL_ASSUME(cond) static_cast<void>((cond) ? 0 : 0)
#endif #endif
// //