tree c2a04e9e099100785c90c383f0146207e9a0baab
parent f9d4af5133c1698b3d2219e60678508913fcbb70
author Adrian Prantl <aprantl@apple.com> 1616461786 -0700
committer Copybara-Service <copybara-worker@google.com> 1616704687 -0700

Teach DWARFExpression about DWARF 4+ Location Descriptions

DWARFExpression implements the DWARF2 expression model that left
ambiguity on whether the result of an expression was a value or an
address. This patch implements the DWARF location description model
introduces in DWARF 4 and sets the result Value's kind accordingly, if
the expression comes from a DWARF v4+ compile unit. The nomenclature
is taken from DWARF 5, chapter 2.6 "Location Descriptions".

Differential Revision: https://reviews.llvm.org/D98996

GitOrigin-RevId: 2c6710a5e10021387e47cf133a9929209c8e0415