Speculative Compilation

[ORC] Remove Speculator Variants for Different Program Representations

[ORC] Block Freq Analysis

Speculative Compilation with Naive Block Frequency

Add Applications to OrcSpeculation

ORC v2 with Block Freq Query & Example

Deleted BenchMark Programs

Signed-off-by: preejackie <praveenvelliengiri@gmail.com>

ORCv2 comments resolved

[ORCV2] NFC

ORCv2 NFC

[ORCv2] Speculative compilation - CFGWalkQuery

ORCv2 Adapting IRSpeculationLayer to new locking scheme

llvm-svn: 367756