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Author SHA1 Message Date
Thomas Lively f969734c21 Reland "[SLPVectorizer] Pre-commit a test for D85759" 
This reverts commit 52b71aa8b1.

The problem was a missing lit.local.cfg file, which was causing the
test to be incorrectly run on bots that had not built the WebAssembly
target.
 2020-08-11 12:18:33 -07:00
Thomas Lively 52b71aa8b1 Revert "[SLPVectorizer] Pre-commit a test for D85759" 
This reverts commit 94791970de.

The test is failing on multiple bots, event though it passes for me
locally. Reverting while I investigate further.
 2020-08-11 12:11:24 -07:00
Thomas Lively 94791970de [SLPVectorizer] Pre-commit a test for D85759 
8cc911fa5b refactored the `getIntrinsicInstrCost` function and was
meant to be a nonfunctional change, but it accidentally changed how
costs were calculated in the SLP vectorizer, which regressed
WebAssembly codegen and resulted in a downstream bug report at
https://github.com/emscripten-core/emscripten/issues/11449.

The fix for this regression is in D85759, and this patch just
pre-commits the test from that patch to demonstrate the regressed
behavior first.
 2020-08-11 11:30:09 -07:00