[PATCH] D12065: [WinEHPrepare] Fix catchret successor phi demotion

[Joseph Tremoulet via llvm-commits]

JosephTremoulet created this revision.
JosephTremoulet added a reviewer: majnemer.
JosephTremoulet added a subscriber: llvm-commits.

When demoting an SSA value that has a use on a phi and one of the phi's
predecessors terminates with catchret, the edge needs to be split and the
load inserted in the new block, else we'll still have a cross-funclet SSA
value.

Add a test for this, and for the similar case where a def to be spilled is
on and invoke and a critical edge, which was already implemented but
missing a test.

http://reviews.llvm.org/D12065

Files:
  lib/CodeGen/WinEHPrepare.cpp
  test/CodeGen/WinEH/wineh-demotion.ll

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