[PATCH] D99160: [X86][FastISEL] Support DW_TAG_call_site_parameter with FastISEL

[Alok Kumar Sharma via Phabricator via llvm-commits]

alok created this revision.
alok added reviewers: aprantl, jmorse, djtodoro.
alok added a project: debug-info.
Herald added subscribers: jansvoboda11, pengfei, ormris, hiraditya.
Herald added a reviewer: sscalpone.
alok requested review of this revision.
Herald added projects: clang, LLVM.
Herald added subscribers: llvm-commits, cfe-commits.

DW_OP_entry_value and DW_TAG_call_site_parameter work together to preserve optimized out paramters value for debugging purpose.
There is always some level of optimization happening even with -O0.
 Currently DW_OP_entry_value is generated at all the options but DW_TAG_call_site_parameter is not generated with FastISEL.
 This causes debuggers to show optimized out parameters value at higher optimization but not at lower optimization.

Adding support to it now.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D99160

Files:
  clang/lib/Frontend/CompilerInvocation.cpp
  llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
  llvm/lib/Target/X86/X86FastISel.cpp
  llvm/test/CodeGen/X86/call-site-info-output.ll
  llvm/test/DebugInfo/X86/callsitepar-fastisel.ll

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