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bug #1515: disable gebp's 3pX4 micro kernel for MSVC<=19.14 because of register spilling.

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This commit is contained in:
Gael Guennebaud 2018-12-07 18:03:36 +01:00
parent 7b6d0ff1f6
commit 956678a4ef
1 changed files with 3 additions and 1 deletions
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4
Eigen/src/Core/products/GeneralBlockPanelKernel.h
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@ -370,10 +370,12 @@ public:
// register block size along the M direction (currently, this one cannot be modified)
default_mr = (EIGEN_PLAIN_ENUM_MIN(16,NumberOfRegisters)/2/nr)*LhsPacketSize,
#if defined(EIGEN_HAS_SINGLE_INSTRUCTION_MADD) && !defined(EIGEN_VECTORIZE_ALTIVEC) && !defined(EIGEN_VECTORIZE_VSX)
#if defined(EIGEN_HAS_SINGLE_INSTRUCTION_MADD) && !defined(EIGEN_VECTORIZE_ALTIVEC) && !defined(EIGEN_VECTORIZE_VSX) \
&& ((!EIGEN_COMP_MSVC) || (EIGEN_COMP_MSVC>=1914))
// we assume 16 registers
// See bug 992, if the scalar type is not vectorizable but that EIGEN_HAS_SINGLE_INSTRUCTION_MADD is defined,
// then using 3*LhsPacketSize triggers non-implemented paths in syrk.
// Bug 1515: MSVC prior to v19.14 yields to register spilling.
mr = Vectorizable ? 3*LhsPacketSize : default_mr,
#else
mr = default_mr,