llvm-project

e8245d53 - [X86][GlobalISel] Support addr matching in SDAG patterns (#130445)

[X86][GlobalISel] Support addr matching in SDAG patterns (#130445) addr matching was the only gatekeeper for starting selecting G_LOAD and G_STORE using SDAG patterns. * Introduce a complex renderer gi_addr for addr. In this patch only the existing functionality has been implemented. The renderer's name is the same as in SDAG: selectAddr. Apparently the type of GIComplexOperandMatcher doesn't matter as RISCV also uses s32 for both 64 and 32 bit pointers. * X86SelectAddress now is used for both: pattern matching and manual selection. As a result it accumulates all the code that previously was distributed among different selection functions. * Replace getLoadStoreOp with getPtrLoadStoreOp in Load/Store selector as GlobalISel matcher or emitter can't map the pointer type into i32/i64 types used in SDAG patterns for pointers. So the load and store selection of pointers is still manual. getLoadStoreOp is still present because it is used in G_FCONSTANT lowering that requires extra efforts to select it using SDAG patterns. * Since truncating stores are not supported, we custom legalize them by matching types of store and MMO. * Introduce a constant pool flag in X86AddressMode because otherwise we need to introduce a GlobalISel copy for X86ISelAddressMode. * Also please notice in the tests that GlobalISel prefers to fold memory operands immediately comparing to SDAG. The reason is that GlobalISel doesn't have target hooks in GIM_CheckIsSafeToFold. Or maybe another check on profitability is required along with safety check that is currently not present.