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Commit 0be4144a authored by Evan Cheng's avatar Evan Cheng
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Allow machine-cse to look across MBB boundary when cse'ing instructions that

define physical registers. It's currently very restrictive, only catching
cases where the CE is in an immediate (and only) predecessor. But it catches
a surprising large number of cases.

rdar://10660865

llvm-svn: 147827
parent d5d2db9a
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