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revert r325515: [TTI CostModel] change default cost of FP ops to 1 (PR36280)

Description

revert r325515: [TTI CostModel] change default cost of FP ops to 1 (PR36280)

There are too many perf regressions resulting from this, so we need to
investigate (and add tests for) targets like ARM and AArch64 before
trying to reinstate.

Details

Committed
spatelFeb 20 2018, 5:42 PM
Parents
rL325657: [lit] Fix a problem with spaces in the python path by adding quotes around it
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