Merging r294348:
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r294348 | hans | 2017-02-07 12:37:45 -0800 (Tue, 07 Feb 2017) | 6 lines
[X86] Disable conditional tail calls (PR31257)
They are currently modelled incorrectly (as calls, which clobber
registers, confusing e.g. Machine Copy Propagation).
Reverting until we figure out the proper solution.
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git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/release_40@294476
91177308-0d34-0410-b5e6-
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projects / llvm / commit