[all-commits] [llvm/llvm-project] 24239e: Add new hidden option -print-on-crash that prints ...

[Jamie Schmeiser via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 24239e246c78c48dabdc042e5c40f40b2a28947b
      https://github.com/llvm/llvm-project/commit/24239e246c78c48dabdc042e5c40f40b2a28947b
  Author: Jamie Schmeiser <schmeise at ca.ibm.com>
  Date:   2022-05-23 (Mon, 23 May 2022)

  Changed paths:
    M llvm/include/llvm/Passes/StandardInstrumentations.h
    M llvm/lib/Passes/PassBuilder.cpp
    M llvm/lib/Passes/PassRegistry.def
    M llvm/lib/Passes/StandardInstrumentations.cpp
    A llvm/test/Other/print-on-crash.ll

  Log Message:
  -----------
  Add new hidden option -print-on-crash that prints out IR that caused opt pipeline to crash

A new hidden option -print-on-crash that prints the IR as it was upon entering
the last pass when there is a crash.

The IR is saved in its print form before each pass is started and a
signal handler is registered.  If the compilation crashes, the signal
handler will print the saved IR to dbgs().  This option
can be modified using -print-module-scope to get the IR for the complete
module.  Note that this option only works with the new pass manager.

Reviewed By: yrouban

Differential Revision: https://reviews.llvm.org/D86657