When compiling an OpenMP or OpenACC program containing a reference in the offloaded code to a symbol that has not been included in the offloaded code, the offloading compiler may ICE in lto1. Fix this by erroring out instead, mentioning the problematic symbol: ... error: variable 'var' has been referenced in offloaded code but hasn't been marked to be included in the offloaded code lto1: fatal error: errors during merging of translation units compilation terminated. ... Build x86_64 with nvptx accelerator and reg-tested libgomp. Build x86_64 and reg-tested libgomp. 2018-12-14 Tom de Vries <tdevries@suse.de> * lto-cgraph.c (verify_node_partition): New function. (input_overwrite_node, input_varpool_node): Use verify_node_partition. * testsuite/libgomp.c-c++-common/function-not-offloaded-aux.c: New test. * testsuite/libgomp.c-c++-common/function-not-offloaded.c: New test. * testsuite/libgomp.c-c++-common/variable-not-offloaded.c: New test. * testsuite/libgomp.oacc-c-c++-common/function-not-offloaded.c: New test. * testsuite/libgomp.oacc-c-c++-common/variable-not-offloaded.c: New test. From-SVN: r267134