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7e5bfbd9da
Split RegisterOperands code that collects defs/uses into a variant with and without lanemask tracking. This is a bit of code duplication, but there are enough subtle differences between the two variants that this seems cleaner (and potentially faster). This also fixes a problem where lanes where tracked even though TrackLaneMasks was false. This is part of the fix for http://llvm.org/PR27106. I will commit the testcase when it is completely fixed. llvm-svn: 264696
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