Matthias Braun fa289ec7f0 VirtRegMap: Correctly deal with bundles when deleting identity copies. ...

This fixes two problems when VirtRegMap encounters bundles:

- When substituting a vreg subregister def with an actual register the
  internal read flag must be cleared.
- Removing an identity COPY from a bundle needs to use
  removeFromBundle() and a newly introduced function to update
  SlotIndexes.

No testcase here, because none of the in-tree targets trigger this,
however an upcoming commit of mine will need this and the testcase there
will trigger this.

Differential Revision: https://reviews.llvm.org/D30925

llvm-svn: 298024

2017-03-17 00:41:33 +00:00

9.4 KiB

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