[PATCH] D120260: [BOLT][NFC] Fix undefined behavior in encodeAnnotationImm

[Amir Ayupov via Phabricator via llvm-commits]

Amir created this revision.
Herald added subscribers: ayermolo, pengfei, kristof.beyls, mgorny.
Herald added a reviewer: rafauler.
Herald added a reviewer: maksfb.
Amir requested review of this revision.
Herald added subscribers: llvm-commits, yota9.
Herald added a project: LLVM.

Fix UBSan-reported issue in MCPlusBuilder::encodeAnnotationImm (left shift of a
negative value).

Test Plan:

  ninja check-bolt
  ...
  PASS: BOLT-Unit :: Core/./CoreTests/AArch64/MCPlusBuilderTester.Annotation/0 (130 of 134)
  PASS: BOLT-Unit :: Core/./CoreTests/X86/MCPlusBuilderTester.Annotation/0 (131 of 134)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D120260

Files:
  bolt/include/bolt/Core/MCPlusAnnotation.h
  bolt/include/bolt/Core/MCPlusBuilder.h
  bolt/unittests/Core/CMakeLists.txt
  bolt/unittests/Core/MCPlusBuilder.cpp

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