[all-commits] [llvm/llvm-project] abe6ec: [AsmPrinter][AMDGPU] Generate uwtable entries in ....

[Juan Manuel Martinez Caamaño via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: abe6ecd7e5f5bc4e57fb6b530e3ea4811d06e4b9
      https://github.com/llvm/llvm-project/commit/abe6ecd7e5f5bc4e57fb6b530e3ea4811d06e4b9
  Author: Juan Manuel MARTINEZ CAAMAÑO <juamarti at amd.com>
  Date:   2023-06-07 (Wed, 07 Jun 2023)

  Changed paths:
    M llvm/include/llvm/CodeGen/AsmPrinter.h
    M llvm/include/llvm/MC/MCAsmInfo.h
    M llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
    M llvm/lib/CodeGen/AsmPrinter/DwarfCFIException.cpp
    M llvm/lib/Target/AMDGPU/MCTargetDesc/AMDGPUMCAsmInfo.cpp
    A llvm/test/CodeGen/AMDGPU/eh_frame.ll
    M llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/amdgpu_generated_funcs.ll.generated.expected
    M llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/amdgpu_generated_funcs.ll.nogenerated.expected

  Log Message:
  -----------
  [AsmPrinter][AMDGPU] Generate uwtable entries in .eh_frame

Consider only targets where `MCAsmInfo::ExceptionsType == ExceptionHandling::None`
and that support CFI (when `MCAsmInfo::UsesCFIForDebug` is set to true):
currently, only AMDGPU.

This patch enables the emission of CFI information in the .eh_frame
section when the uwtable attribute is present on a function.

Before, we could generate CFI information for debugging puproses only.

This patch prepares AMDGPU to support collecting GPU stack traces in the future.

I did a first implementation (https://reviews.llvm.org/D139024)
but at the time I had not realized that no other platform used
`UsesCFIForDebug`.

Reviewed By: scott.linder

Differential Revision: https://reviews.llvm.org/D151806