llvm-project

aad69977 - [RISCV] Fold PseudoVMV_V_V with undef passthru, handling policy (#106943)

[RISCV] Fold PseudoVMV_V_V with undef passthru, handling policy (#106943) If a vmv.v.v has an undef passthru then we can just replace it with its input operand, since the tail is completely undefined. This is a reattempt of #106840, but also checks to see if the input was a pseudo where we can relax its tail policy to undef. This also means we don't need to check for undef passthrus in foldVMV_V_V anymore because they will be handled by foldUndefPassthruVMV_V_V.