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[Alignment][NFC] Add DebugStr and operator*

Authored by gchatelet on Apr 6 2020, 3:08 AM.

Description

[Alignment][NFC] Add DebugStr and operator*

Summary:
This is a roll forward of D77394 minus AlignmentFromAssumptions (which needs to be addressed separately)
Differences from D77394:

  • DebugStr() now prints the alignment value or None and no more Align(x) or MaybeAlign(x)
    • This is to keep Warning message consistent (CodeGen/SystemZ/alloca-04.ll)
  • Removed a few unneeded headers from Alignment (since it's included everywhere it's better to keep the dependencies to a minimum)

Reviewers: courbet

Subscribers: sdardis, hiraditya, jrtc27, atanasyan, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77537

Details