[all-commits] [llvm/llvm-project] 6a8082: [DebugInfo] add test case for D147506, NFC

[Chen Zheng via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6a808270e8a9becc07857240ebbf6731743a4485
      https://github.com/llvm/llvm-project/commit/6a808270e8a9becc07857240ebbf6731743a4485
  Author: Chen Zheng <czhengsz at cn.ibm.com>
  Date:   2023-05-04 (Thu, 04 May 2023)

  Changed paths:
    A llvm/test/DebugInfo/XCOFF/empty-prolog.ll

  Log Message:
  -----------
  [DebugInfo] add test case for D147506, NFC

[DebugLine] save one debug line entry for empty prologue


  Commit: b48a8233f5e230e46182bf5c523ceb6a04cec8f5
      https://github.com/llvm/llvm-project/commit/b48a8233f5e230e46182bf5c523ceb6a04cec8f5
  Author: Chen Zheng <czhengsz at cn.ibm.com>
  Date:   2023-05-04 (Thu, 04 May 2023)

  Changed paths:
    M llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/combine-shift-of-shifted-dbg-value-fallback.ll
    M llvm/test/DebugInfo/XCOFF/empty-prolog.ll
    M llvm/test/DebugInfo/XCOFF/explicit-section.ll
    M llvm/test/DebugInfo/XCOFF/function-sections.ll
    M llvm/test/MC/WebAssembly/debug-info.ll
    M llvm/test/MC/WebAssembly/debug-info64.ll

  Log Message:
  -----------
  [DebugLine] save one debug line entry for empty prologue

Some debuggers like DBX on AIX assume the address in debug line
entries is always incremental. But clang generates two entries (entry
for file scope line and entry for prologue end) with same address if
prologue is empty

And if the prologue is empty, seems the first debug line entry for the
function is unnecessary(i.e. removing the first entry won't impact the
behavior in GDB on Linux), so I implement this for all debuggers.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D147506


Compare: https://github.com/llvm/llvm-project/compare/7aeb1536a1a1...b48a8233f5e2