tree e91e25b2ac439bcedd8e8acac69cfaf63a7d16d3
parent 829b62adf5db189843b9a9ce626dfef97f76059f
author Jeremy Morse <jeremy.morse@sony.com> 1638223606 +0000
committer Jeremy Morse <jeremy.morse@sony.com> 1638224659 +0000

[DebugInfo][InstrRef] Add indirection from dbg.declare in SelectionDAG

Usually dbg.declares get translated into either entries in an MF
side-table, or a DBG_VALUE on entry to the function with IsIndirect set
(including in instruction referencing mode). Much rarer is a dbg.declare
attached to a non-argument value, such as in the test added in this patch
where there's a variable-length-array. Such dbg.declares become SDDbgValue
nodes with InIndirect=true.

As it happens, we weren't correctly emitting DBG_INSTR_REFs with the
additional indirection. This patch adds the extra indirection, encoded as
adding an additional DW_OP_deref to the expression.

Differential Revision: https://reviews.llvm.org/D114440