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Merged in rmlarsen/eigen2 (pull request PR-183)

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Detect cxx_constexpr support when compiling with clang.
This commit is contained in:
Benoit Steiner 2016-04-27 15:19:54 -07:00
commit 2b917291d9
1 changed files with 7 additions and 7 deletions
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14
Eigen/src/Core/util/Macros.h
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@ -371,10 +371,10 @@
// Does the compiler support const expressions?
#ifdef __CUDACC__
// Const expressions are supported provided that c++11 is enabled and we're using either clang or nvcc 7.5 or above
#if __cplusplus > 199711L && defined(__CUDACC_VER__) && (defined(__clang__) || __CUDACC_VER__ >= 70500)
#if __cplusplus > 199711L && defined(__CUDACC_VER__) && (EIGEN_COMP_CLANG || __CUDACC_VER__ >= 70500)
#define EIGEN_HAS_CONSTEXPR 1
#endif
#elif (defined(__cplusplus) && __cplusplus >= 201402L) || \
#elif __has_feature(cxx_relaxed_constexpr) || (defined(__cplusplus) && __cplusplus >= 201402L) || \
EIGEN_GNUC_AT_LEAST(4,8)
#define EIGEN_HAS_CONSTEXPR 1
#endif
@ -572,12 +572,12 @@ namespace Eigen {
//------------------------------------------------------------------------------------------
// Static and dynamic alignment control
//
//
// The main purpose of this section is to define EIGEN_MAX_ALIGN_BYTES and EIGEN_MAX_STATIC_ALIGN_BYTES
// as the maximal boundary in bytes on which dynamically and statically allocated data may be alignment respectively.
// The values of EIGEN_MAX_ALIGN_BYTES and EIGEN_MAX_STATIC_ALIGN_BYTES can be specified by the user. If not,
// a default value is automatically computed based on architecture, compiler, and OS.
//
//
// This section also defines macros EIGEN_ALIGN_TO_BOUNDARY(N) and the shortcuts EIGEN_ALIGN{8,16,32,_MAX}
// to be used to declare statically aligned buffers.
//------------------------------------------------------------------------------------------
@ -637,7 +637,7 @@ namespace Eigen {
#ifndef EIGEN_MAX_STATIC_ALIGN_BYTES
// Try to automatically guess what is the best default value for EIGEN_MAX_STATIC_ALIGN_BYTES
// 16 byte alignment is only useful for vectorization. Since it affects the ABI, we need to enable
// 16 byte alignment on all platforms where vectorization might be enabled. In theory we could always
// enable alignment, but it can be a cause of problems on some platforms, so we just disable it in
@ -664,13 +664,13 @@ namespace Eigen {
#else
#define EIGEN_ARCH_WANTS_STACK_ALIGNMENT 0
#endif
#if EIGEN_ARCH_WANTS_STACK_ALIGNMENT
#define EIGEN_MAX_STATIC_ALIGN_BYTES EIGEN_IDEAL_MAX_ALIGN_BYTES
#else
#define EIGEN_MAX_STATIC_ALIGN_BYTES 0
#endif
#endif
// If EIGEN_MAX_ALIGN_BYTES is defined, then it is considered as an upper bound for EIGEN_MAX_ALIGN_BYTES