[all-commits] [llvm/llvm-project] 2fe82e: [GlobalISel] use constexpr LLT types when creating...

[Stanley Gambarin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2fe82e377f890d11e5915526f97ef7dce8a2d1d4
      https://github.com/llvm/llvm-project/commit/2fe82e377f890d11e5915526f97ef7dce8a2d1d4
  Author: Stanley Gambarin <stanley.gambarin at intel.com>
  Date:   2026-04-14 (Tue, 14 Apr 2026)

  Changed paths:
    M llvm/test/TableGen/GlobalISelEmitter/GlobalISelEmitter.td
    M llvm/utils/TableGen/Common/GlobalISel/GlobalISelMatchTable.cpp

  Log Message:
  -----------
  [GlobalISel] use constexpr LLT types when creating ISel data (#191574)

The GlobalISel uses a lookup table to map LLTs which is constructed
prior to initialization of extended LLT functionality, resulting in
ANY_SCALAR entries. During instruction selection, a hash-based
lookup is done on actual INTEGER/FLOAT LLTs. But hash values of
ANY_SCALAR do not match those of INTEGER/FLOAT, causing a failure.

Workaround is the use constexpr LLT, which encodes INTEGER/FLOAT LLT.

Assisted-by: Claude Opus 4.6



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