[all-commits] [llvm/llvm-project] 9d4885: [RISCV][GISel] Remove source constraint from selec...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9d488569bbc44ae21a9ae31f77750f7fa6f4d3ad
      https://github.com/llvm/llvm-project/commit/9d488569bbc44ae21a9ae31f77750f7fa6f4d3ad
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2023-09-27 (Wed, 27 Sep 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/GISel/RISCVInstructionSelector.cpp

  Log Message:
  -----------
  [RISCV][GISel] Remove source constraint from selectCopy and use it fo… (#67207)

…r G_ANYEXT/G_TRUNC.

AArch64, Mips, and ARM do not have source constraints in their version
of selectCopy. I'm assuming we don't need it either.

We weren't constraining the destination register of G_ANYEXT/G_TRUNC
previously, but we got away with it in our tests because all their users
constrained them as a use. When I removed the source constraint from
selectCopy this stopped working.