recent clang fails compile step in v8's mksnapshot for arm |
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Issue descriptionFor example: https://ci.chromium.org/p/chromium/builders/luci.chromium.try/android_cronet/106407 https://ci.chromium.org/p/chromium/builders/luci.chromium.try/android-kitkat-arm-rel/90571 Which are tryjobs from https://chromium-review.googlesource.com/c/chromium/src/+/1245465 using Clang 343103 It's possible later clangs work but we should confirm.
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Sep 27
Bisection points to this one: Author: bogner Date: Mon Sep 24 22:16:44 2018 New Revision: 342942 URL: http://llvm.org/viewvc/llvm-project?rev=342942&view=rev Log: [MachineCopyPropagation] Reimplement CopyTracker in terms of register units Change the copy tracker to keep a single map of register units instead of 3 maps of registers. This gives a very significant compile time performance improvement to the pass. I measured a 30-40% decrease in time spent in MCP on x86 and AArch64 and much more significant improvements on out of tree targets with more registers. Differential Revision: https://reviews.llvm.org/D52374
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Sep 27
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Comment 1 by h...@chromium.org
, Sep 27