Merge remote-tracking branch 'upstream/main' into popcount-libcall-1

# Conflicts:
#	llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp
#	llvm/test/Analysis/CostModel/RISCV/int-bit-manip.ll
#	llvm/test/CodeGen/RISCV/ctlz-cttz-ctpop.ll
#	llvm/test/CodeGen/RISCV/ctz_zero_return_test.ll
#	llvm/test/CodeGen/RISCV/pr56457.ll
#	llvm/test/CodeGen/RISCV/pr95271.ll
#	llvm/test/CodeGen/RISCV/rv32xtheadbb.ll
#	llvm/test/CodeGen/RISCV/rv32zbb.ll
#	llvm/test/CodeGen/RISCV/rv64xtheadbb.ll
#	llvm/test/CodeGen/RISCV/rv64zbb.ll
#	llvm/test/CodeGen/RISCV/sextw-removal.ll

Author: s-barannikov