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[InlineCost] Tracking Values through PHI Nodes

Description

[InlineCost] Tracking Values through PHI Nodes

This patch fix this FIXME in visitPHI()

FIXME: We should potentially be tracking values through phi nodes,
especially when they collapse to a single value due to deleted CFG edges
during inlining.

Differential Revision: https://reviews.llvm.org/D38594

Details

Committed
haichengDec 14 2017, 6:36 AM
Differential Revision
D38594: [InlineCost] Tracking Values through PHI Nodes
Parents
rL320698: Revert "[DAGCombine] Move AND nodes to multiple load leaves"
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