Matt Arsenault 65ad1602b0 Add target hook to allow merging stores of nonzero constants ...

On GPU targets, materializing constants is cheap and stores are
expensive, so only doing this for zero vectors was silly.

Most of the new testcases aren't optimally merged, and are for
later improvements.

llvm-svn: 238108

2015-05-24 00:51:27 +00:00

533 KiB

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