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536b9eb31e
In some scenarios, usually involving NRVO, we can issue indirect DBG_VALUEs after SelectionDAG, even in instruction referencing mode (if the variable is an argument). If the corresponding argument value is spilt to the stack, then we have: * Indirection from it being on the stack, * Indirection from it being a dbg.declare or a dbg.addr. However InstrRefBasedLDV only emits one level of indirection. This patch adds the second, by adding an extra DW_OP_deref if necessary. The two tests modified fail otherwise -- they feature some NRVO, and require two levels of indirection to be correct. Differential Revision: https://reviews.llvm.org/D114364