Yi-Hong Lyu 41a010a4ef [PowerPC] Remove redundant load immediate instructions ...

Currently PowerPC backend emits code like this:

  r3 = li 0
  std r3, 264(r1)
  r3 = li 0
  std r3, 272(r1)

This patch fixes that and other cases where a register already contains a value that is loaded so we will get:

  r3 = li 0
  std r3, 264(r1)
  std r3, 272(r1)

Differential Revision: https://reviews.llvm.org/D64220

llvm-svn: 366840

2019-07-23 19:11:07 +00:00

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