[PATCH] D80345: [DwarfExpression] Support entry values for indirect parameters

[Vedant Kumar via Phabricator via llvm-commits]

vsk created this revision.
vsk added reviewers: djtodoro, aprantl, dstenb.
Herald added subscribers: lldb-commits, hiraditya.
Herald added projects: LLDB, LLVM.

A struct argument can be passed-by-value to a callee via a pointer to a
temporary stack copy. Add support for emitting an entry value DBG_VALUE
when an indirect parameter DBG_VALUE becomes unavailable. This is done
by omitting DW_OP_stack_value from the entry value expression, to make
the expression describe the location of an object.

rdar://63373691


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D80345

Files:
  lldb/test/API/functionalities/param_entry_vals/basic_entry_values/main.cpp
  llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
  llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
  llvm/lib/CodeGen/AsmPrinter/DwarfExpression.cpp
  llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
  llvm/lib/CodeGen/LiveDebugValues.cpp
  llvm/test/DebugInfo/MIR/AArch64/dbgcall-site-indirect-param.mir

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