addPhi() — react Function Reference

Architecture documentation for the addPhi() function in EnterSSA.ts from the react codebase.

Function typescript MIRInfrastructure HIR calls 1 called by 2

Entity Profile

MIRInfrastructure→ HIR→ addPhi() — react Function Reference

Dependency Diagram

graph TD
  239be53b_dfd4_96c6_9550_ca5aa6b80da2["addPhi()"]
  f11adc00_6af6_2575_4ee8_974e26f2a6ed["SSABuilder"]
  239be53b_dfd4_96c6_9550_ca5aa6b80da2 -->|defined in| f11adc00_6af6_2575_4ee8_974e26f2a6ed
  ab76c4b1_9d69_98c8_d44f_9505c6f4c84e["getIdAt()"]
  ab76c4b1_9d69_98c8_d44f_9505c6f4c84e -->|calls| 239be53b_dfd4_96c6_9550_ca5aa6b80da2
  6504c0db_f212_8c3b_f87a_9a785dbe810d["fixIncompletePhis()"]
  6504c0db_f212_8c3b_f87a_9a785dbe810d -->|calls| 239be53b_dfd4_96c6_9550_ca5aa6b80da2
  ab76c4b1_9d69_98c8_d44f_9505c6f4c84e["getIdAt()"]
  239be53b_dfd4_96c6_9550_ca5aa6b80da2 -->|calls| ab76c4b1_9d69_98c8_d44f_9505c6f4c84e
  style 239be53b_dfd4_96c6_9550_ca5aa6b80da2 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

compiler/packages/babel-plugin-react-compiler/src/SSA/EnterSSA.ts lines 186–201

  addPhi(block: BasicBlock, oldPlace: Place, newPlace: Place): Identifier {
    const predDefs: Map<BlockId, Place> = new Map();
    for (const predBlockId of block.preds) {
      const predId = this.getIdAt(oldPlace, predBlockId);
      predDefs.set(predBlockId, {...oldPlace, identifier: predId});
    }

    const phi: Phi = {
      kind: 'Phi',
      place: newPlace,
      operands: predDefs,
    };

    block.phis.add(phi);
    return newPlace.identifier;
  }