instr_operands_valid missing from dr_ir_instr.h

Created by: byron-hawkins

Building the master branch today, the API function instr_operands_valid() that is declared in core/arch/instr.h is no longer exported to <build>/include/dr_ir_instr.h. My build is configured like this:

cmake -G Ninja -DDEBUG=ON ../src

The DR_API tag is still present on the missing function, so it looks like some other change in the preprocessing has somehow alienated this function. A simple workaround is to checkout from tag release_7_0_0_rc1.