NEC compilers SIGSEGV while explicit template instantiations of many functions in one translation unit

[quickwritereader]

NEC compilers SIGSEGV while explicit template instantiations of many functions in one translation unit

Compiler:

ncc --version
ncc (NCC) 3.0.8 (Build 08:14:57 Aug 26 2020)
Copyright (C) 2018,2020 NEC Corporation.

#We can show it using our codebase

git clone https://github.com/KonduitAI/deeplearning4j
cd deeplearning4j/libnd4j
git checkout sa_aurora


#create an example that fails to compile which have many template instantiations

>example_failure.cpp  cat <<EOF
#include <loops/cpu/reduce/reduce_float.hpp> 
namespace functions {
    namespace reduce {
        BUILD_DOUBLE_TEMPLATE(template class ND4J_EXPORT ReduceFloatFunction, , LIBND4J_TYPES, FLOAT_TYPES_0);
    }
}
EOF

#create an example that compiles

>example_success.cpp  cat <<EOF
#include <loops/cpu/reduce/reduce_float.hpp> 
namespace functions {
    namespace reduce {
        BUILD_DOUBLE_TEMPLATE(template class ND4J_EXPORT ReduceFloatFunction, , LIBND4J_TYPES_0, FLOAT_TYPES_0);
    }
}
EOF


LIBND4J_HOME=`pwd`


#change some headers to skip unnecessary dependencies
sed -i "s|#include <graph/generated/array_generated.h>|//#include <graph/generated/array_generated.h>|" ${LIBND4J_HOME}/include/array/DataTypeUtils.h
sed -i "s|static DataType fromFlatDataType(sd::graph|//static DataType fromFlatDataType(sd::graph|" ${LIBND4J_HOME}/include/array/DataTypeUtils.h
sed -i "s|#include <graph/generated/result_generated.h>|//#include <graph/generated/result_generated.h>|" ${LIBND4J_HOME}/include/array/ResultSet.h
sed -i "s|ResultSet(const sd::graph|//ResultSet(const sd::graph|" ${LIBND4J_HOME}/include/array/ResultSet.h

#Create fake config.h

touch ${LIBND4J_HOME}/include/config.h

#Compilation

COMPILER_ARGS="-I${LIBND4J_HOME}/blasbuild/aurora/include -I${LIBND4J_HOME}/include  -std=gnu++14 -DSD_ALL_OPS=true -fopenmp -w -O3 -fPIC -finline-functions -finline-max-depth=10 -fopenmp -fassociative-math -D_RELEASE=true "


ncc -c example_failure.cpp ${COMPILER_ARGS}

#outputs : ncc: /opt/nec/ve/ncc/3.0.8/libexec/ccom is abnormally terminated by SIGSEGV


ncc -c example_success.cpp ${COMPILER_ARGS}
#compiles just fine

[agibsonccc]

@saudet @mikishin

[saudet]

@mikishin For clarity, I'll repeat here what I said by email. This is a regression from NCC 3.0.6. This only happens with NCC 3.0.8.