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Commit 38402dc9 authored by Duncan P. N. Exon Smith's avatar Duncan P. N. Exon Smith
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PGO: Scale large counters down to 32-bits

PGO counters are 64-bit and branch weights are 32-bit.  Scale them down
when necessary, instead of just taking the lower 32 bits.

<rdar://problem/16276448>

llvm-svn: 203592
parent f164d940
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