Dan Gohman dab313e0ed PeepholeOptimizer: Ignore dead implicit defs ...

Target-specific instructions may have uninteresting physreg clobbers,
for target-specific reasons. The peephole pass doesn't need to concern
itself with such defs, as long as they're implicit and marked as dead.

llvm-svn: 255182

2015-12-10 00:37:51 +00:00

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