[all-commits] [llvm/llvm-project] 485d25: [RISCV] Custom lower fixed vector undef to scalabl...

[Luke Lau via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 485d25007a2faaa2e3deec1e9fafb7dd1c8e4536
      https://github.com/llvm/llvm-project/commit/485d25007a2faaa2e3deec1e9fafb7dd1c8e4536
  Author: Luke Lau <luke at igalia.com>
  Date:   2023-06-21 (Wed, 21 Jun 2023)

  Changed paths:
    M llvm/lib/Target/RISCV/RISCVISelLowering.cpp
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-int-shuffles.ll
    M llvm/test/CodeGen/RISCV/rvv/fixed-vectors-unaligned.ll
    M llvm/test/CodeGen/RISCV/rvv/shuffle-reverse.ll
    M llvm/test/CodeGen/RISCV/rvv/vector-interleave-fixed.ll

  Log Message:
  -----------
  [RISCV] Custom lower fixed vector undef to scalable undef

This avoids undefs from being expanded to a build vector of zeroes.
As noted by @craig.topper in D153399

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D153411