[PATCH] D13176: PrologueEpilogInserter: Fix missing live-ins when savepoint equals restorepoint

[Matthias Braun via llvm-commits]

MatzeB created this revision.
MatzeB added a reviewer: qcolombet.
MatzeB added subscribers: llvm-commits, kbarton, hfinkel.
MatzeB set the repository for this revision to rL LLVM.

The algorithm would not modify the live-in list of blocks below the save
block point which is correct unless it happens to be a restore point at
the same time.

Also fixes the benign issue of live-in registers being added twice in some cases.

The testcase is based on a test submitted by Kit Barton.

Repository:
  rL LLVM

http://reviews.llvm.org/D13176

Files:
  lib/CodeGen/PrologEpilogInserter.cpp
  test/CodeGen/PowerPC/shrinkwrapping.ll

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