Matthias Braun 852989f86c 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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298024 91177308-0d34-0410-b5e6-96231b3b80d8

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

..

llvm

VirtRegMap: Correctly deal with bundles when deleting identity copies.

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

llvm-c

[GVN] Initial check-in of a new global value numbering algorithm.

2016-12-22 16:03:48 +00:00