[all-commits] [llvm/llvm-project] 54c195: [GlobalISel] Revise 'assignCustomValue' interface ...

[darkbuck via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 54c19546ba6ffd24a3bcb0c0d145309ed6f8ce46
      https://github.com/llvm/llvm-project/commit/54c19546ba6ffd24a3bcb0c0d145309ed6f8ce46
  Author: darkbuck <michael.hliao at gmail.com>
  Date:   2024-01-12 (Fri, 12 Jan 2024)

  Changed paths:
    M llvm/include/llvm/CodeGen/GlobalISel/CallLowering.h
    M llvm/lib/CodeGen/GlobalISel/CallLowering.cpp
    M llvm/lib/Target/ARM/ARMCallLowering.cpp
    M llvm/lib/Target/Mips/MipsCallLowering.cpp
    M llvm/lib/Target/RISCV/GISel/RISCVCallLowering.cpp

  Log Message:
  -----------
  [GlobalISel] Revise 'assignCustomValue' interface (#77824)

- Previously, 'assignCustomValue' requests the number of assigned VAs
minus 1 is returned and treats 0 as the assignment failure. However,
under that arrangment, we cannot tell a successful *single* VA custom
assignment from the failure case.
- This change requests that 'assignCustomValue' just return the number
of all VAs assigned, including the first WA so that it won't be ambigous
to tell the failure case from the single VA custom assignment.