Duncan P. N. Exon Smith f48e982706 CodeGen: Push the ModuleSlotTracker through MachineOperands ...

Push `ModuleSlotTracker` through `MachineOperand`s, dropping the time
for `llc -print-machineinstrs` on the testcase in PR23865 from ~13
seconds to ~9 seconds.  Now `SlotTracker::processFunctionMetadata()`
accounts for only 8% of the runtime, which seems reasonable.

llvm-svn: 240845

2015-06-26 22:06:47 +00:00

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