[all-commits] [llvm/llvm-project] cd6434: [ExpandLargeDivRem] Scalarize vector types. (#86959)

[Bevin Hansson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cd6434f9ec9af8d7508dc53806440297a24292cf
      https://github.com/llvm/llvm-project/commit/cd6434f9ec9af8d7508dc53806440297a24292cf
  Author: Bevin Hansson <59652494+bevin-hansson at users.noreply.github.com>
  Date:   2024-04-02 (Tue, 02 Apr 2024)

  Changed paths:
    M llvm/lib/CodeGen/ExpandLargeDivRem.cpp
    M llvm/test/CodeGen/AMDGPU/div_v2i128.ll
    A llvm/test/Transforms/ExpandLargeDivRem/X86/vector.ll

  Log Message:
  -----------
  [ExpandLargeDivRem] Scalarize vector types. (#86959)

expand-large-divrem cannot handle vector types.
If overly large vector element types survive into
isel, they will likely be scalarized there, but since
isel cannot handle scalar integer types of that size,
it will assert.

Handle vector types in expand-large-divrem by
scalarizing them and then expanding the scalar type
operation. For large vectors, this results in a
*massive* code expansion, but it's better than
asserting.



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