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d5ddb320ef
Summary: Once we emit function code, we no longer need CFG for next phases that use basic blocks for address-translation and symbol update purposes. We free memory used by CFG and instructions. The freed memory gets reused by later phases resulting in overall memory usage reduction. We can probably improve memory consumption even further by replacing BinaryBasicBlocks with more compact data structures. (cherry picked from FBD18408954)
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