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Fix EIGEN_OPTIMIZATION_BARRIER for clang-cl

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This commit is contained in:
Antonio Sanchez 2025-07-31 17:02:43 +00:00
parent f5ead2d34c
commit e4493233e8
1 changed files with 11 additions and 10 deletions
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21
Eigen/src/Core/util/Macros.h
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@ -993,8 +993,9 @@ EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE constexpr void ignore_unused_variable(cons
#endif
#if !defined(EIGEN_OPTIMIZATION_BARRIER)
#if EIGEN_COMP_GNUC
// According to https://gcc.gnu.org/onlinedocs/gcc/Constraints.html:
// Implement the barrier on GNUC compilers or clang-cl.
#if EIGEN_COMP_GNUC || (defined(__clang__) && defined(_MSC_VER))
// According to https://gcc.gnu.org/onlinedocs/gcc/Constraints.html:
// X: Any operand whatsoever.
// r: A register operand is allowed provided that it is in a general
// register.
@ -1027,37 +1028,37 @@ EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE constexpr void ignore_unused_variable(cons
// directly for std::complex<T>, Eigen::half, Eigen::bfloat16. For these,
// you will need to apply to the underlying POD type.
#if EIGEN_ARCH_PPC && EIGEN_COMP_GNUC_STRICT
// This seems to be broken on clang. Packet4f is loaded into a single
// This seems to be broken on clang. Packet4f is loaded into a single
// register rather than a vector, zeroing out some entries. Integer
// types also generate a compile error.
#if EIGEN_OS_MAC
// General, Altivec for Apple (VSX were added in ISA v2.06):
// General, Altivec for Apple (VSX were added in ISA v2.06):
#define EIGEN_OPTIMIZATION_BARRIER(X) __asm__("" : "+r,v"(X));
#else
// General, Altivec, VSX otherwise:
// General, Altivec, VSX otherwise:
#define EIGEN_OPTIMIZATION_BARRIER(X) __asm__("" : "+r,v,wa"(X));
#endif
#elif EIGEN_ARCH_ARM_OR_ARM64
#ifdef __ARM_FP
// General, VFP or NEON.
// General, VFP or NEON.
// Clang doesn't like "r",
// error: non-trivial scalar-to-vector conversion, possible invalid
// constraint for vector typ
#define EIGEN_OPTIMIZATION_BARRIER(X) __asm__("" : "+g,w"(X));
#else
// Arm without VFP or NEON.
// Arm without VFP or NEON.
// "w" constraint will not compile.
#define EIGEN_OPTIMIZATION_BARRIER(X) __asm__("" : "+g"(X));
#endif
#elif EIGEN_ARCH_i386_OR_x86_64
// General, SSE.
// General, SSE.
#define EIGEN_OPTIMIZATION_BARRIER(X) __asm__("" : "+g,x"(X));
#else
// Not implemented for other architectures.
// Not implemented for other architectures.
#define EIGEN_OPTIMIZATION_BARRIER(X)
#endif
#else
// Not implemented for other compilers.
// Not implemented for other compilers.
#define EIGEN_OPTIMIZATION_BARRIER(X)
#endif
#endif