[AIEX] Shift G_CONCAT_VECTORS closer to the user #234
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When commiting applyUpdToConcat. This enables more postinc combiner cases.
andcarminati
requested review from
abhinay-anubola,
abnikant,
gbossu,
khallouh,
konstantinschwarz,
martien-de-jong,
SagarMaheshwari99 and
stephenneuendorffer
as code owners
|
QoR results: The results quite modest at first glance, but the real goal of this PR is remove one PADD from GEMM in its innermost loop. GEMM aie-public: GEMM this PR: |
F-Stuckmann
reviewed
Nov 13, 2024
| void llvm::applyUpdToConcat(MachineInstr &MI, MachineRegisterInfo &MRI, | ||
| MachineIRBuilder &B, | ||
| std::map<unsigned, Register> &IndexRegMap) { | ||
| B.setInstrAndDebugLoc(MI); | ||
| B.setDebugLoc(MI.getDebugLoc()); |
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why aren't the debug location and insertion point for MachineInstr the same?
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Hi @F-Stuckmann , in this case, the goal is to retain the same debug information (related to the instruction that we are replacing), but building the instruction in a different (shifted) position.
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When commiting applyUpdToConcat. This enables more postinc combiner cases.