gcc-4.9/gcc/testsuite/g++.dg/other/error23.C


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// PR c++/34918
// { dg-do compile }

int v __attribute ((vector_size (8)));
bool b = !(v - v);	// { dg-error "could not convert .\\(__vector.2. int\\)\\{0, 0\\}. from .__vector.2. int. to .bool.|in argument to unary" }