Matt Arsenault 52d1b62a28 AMDGPU: Don't wait at end of block with a trivial successor ...

If there is only one successor, and that successor only
has one predecessor the wait can obviously be delayed until
uses or the end of the next block. This avoids code quality
regressions when there are trivial fallthrough blocks inserted
for structurization.

llvm-svn: 297251

2017-03-08 01:06:58 +00:00

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