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[AArch64] Re-run load/store optimizer after aggressive tail duplication

Description

[AArch64] Re-run load/store optimizer after aggressive tail duplication

The Load/Store Optimizer runs before Machine Block Placement. At O3 the
Tail Duplication Threshold is set to 4 instructions and this can create
new opportunities for the Load/Store Optimizer. It seems worthwhile to
run it once again.

Details

Committed
alelab01Dec 17 2018, 2:45 AM
Parents
rL349337: [ELF][ARM] Add support for architecture v6m thunks
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