[all-commits] [llvm/llvm-project] 775de2: [RISCV][GISel] Support unaligned-scalar-mem. (#108...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 775de20c3a0a149158cdafce66ef29510a436f1f
      https://github.com/llvm/llvm-project/commit/775de20c3a0a149158cdafce66ef29510a436f1f
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2024-09-18 (Wed, 18 Sep 2024)

  Changed paths:
    M llvm/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-load-rv32.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-load-rv64.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-store-rv32.mir
    M llvm/test/CodeGen/RISCV/GlobalISel/legalizer/legalize-store-rv64.mir

  Log Message:
  -----------
  [RISCV][GISel] Support unaligned-scalar-mem. (#108905)

We need to set the required alignment to 8 with unaligned-scalar-mem. If we don't do this, the legalizer will try to lower the unaligned load/store and the lower code will call allowsMemoryAccess to verify what its supposed to do. allowsMemoryAccess will say the unaligned access is allowed. So the legalizer gives up.



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