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Commit 894916ca authored by Craig Topper's avatar Craig Topper
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[X86] In combineLoopMAddPattern and combineLoopSADPattern, preserve the vector... 

[X86] In combineLoopMAddPattern and combineLoopSADPattern, preserve the vector reduction flag on the final add. Handle unrolled loops by letting DAG combine revisit.

This reverts r340478 and r340631 and replaces them with a simpler
method of just letting DAG combine revisit the nodes to handle
the other operand.

llvm-svn: 367195
parent 99c57c6d
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