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Commit 819e3e02 authored by Hans Wennborg's avatar Hans Wennborg
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[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.

llvm-svn: 294348
parent 968d70ff
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