Vedant Kumar 808e157356
Mark @llvm.trap cold ...
A call to @llvm.trap can be expected to be cold (i.e. unlikely to be
reached in a normal program execution).
Outlining paths which unconditionally trap is an important memory
saving. As the hot/cold splitting pass (imho) should not treat all
noreturn calls as cold, explicitly mark @llvm.trap cold so that it can
be outlined.
Split out of https://reviews.llvm.org/D54244 .
Differential Revision: https://reviews.llvm.org/D54329
llvm-svn: 346885
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