Erik Eckstein 6760dc420c SIL: add a utility which can manage per-value and per-instruction bitfields and flags efficiently. ...

It's used to implement `InstructionSet` and `ValueSet`: sets of SILValues and SILInstructions.
Just like `BasicBlockSet` for basic blocks, the set is implemented by setting bits directly in SILNode.
This is super efficient because insertion and deletion to/from the set are basic bit operations.

The cost is an additional word in SILNode. But this is basically negligible: it just adds ~0.7% of memory used for SILInstructions.
In my experiments, I didn't see any relevant changes in memory consumption or compile time.

2022-07-13 14:27:50 +02:00

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CMakeLists.txt

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SILBitfieldTest.cpp

SIL: add a utility which can manage per-value and per-instruction bitfields and flags efficiently.

2022-07-13 14:27:50 +02:00