[all-commits] [llvm/llvm-project] 2ec773: [FastISel] Bail out of selectGetElementPtr for vec...

[topperc via All-commits]

  Branch: refs/heads/release/11.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 2ec773995076236110d4ffb1db7e6723c22519fc
      https://github.com/llvm/llvm-project/commit/2ec773995076236110d4ffb1db7e6723c22519fc
  Author: Craig Topper <craig.topper at intel.com>
  Date:   2020-09-15 (Tue, 15 Sep 2020)

  Changed paths:
    M llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
    M llvm/test/CodeGen/X86/masked_gather_scatter.ll

  Log Message:
  -----------
  [FastISel] Bail out of selectGetElementPtr for vector GEPs.

The code that decomposes the GEP into ADD/MUL doesn't work properly
for vector GEPs. It can create bad COPY instructions or possibly
assert.

For now just bail out to SelectionDAG.

Fixes PR45906

(cherry picked from commit 4208ea3e19f8e3e8cd35e6f5a6c43f4aa066c6ec)