llvm-project

98e26bcd - [AArch64] ConditionOptimizer: replace intra-block scan with map-based algorithm (#190455)

[AArch64] ConditionOptimizer: replace intra-block scan with map-based algorithm (#190455) The previous condopt implementation found the first two CSINC instructions in a block and attempted one optimisation, ignoring other possible pairs. It also performed extra forward and backward walks. Replace the two-CSINC scan with a single forward walk maintaining a DenseMap keyed by canonical (copy-traced) register. Any number of pairs per block are now handled.