[all-commits] [llvm/llvm-project] 062601: [LoongArch] Implement canMergeStoresTo to avoid cr...

[lrzlin via All-commits]

  Branch: refs/heads/release/22.x
  Home:   https://github.com/llvm/llvm-project
  Commit: 0626016c5b901e84efd046181439a25276680b8d
      https://github.com/llvm/llvm-project/commit/0626016c5b901e84efd046181439a25276680b8d
  Author: lrzlin <linrunze at loongson.cn>
  Date:   2026-04-01 (Wed, 01 Apr 2026)

  Changed paths:
    M llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp
    M llvm/lib/Target/LoongArch/LoongArchISelLowering.h
    A llvm/test/CodeGen/LoongArch/mergestores.ll

  Log Message:
  -----------
  [LoongArch] Implement canMergeStoresTo to avoid crash while NoImplicitFloat attribute is set (#188005)

Currently, when the `NoImplicitFloat` attribute is set, consecutive
64-bit load
and store operations will be combined into 128-bit ones, which is
illegal
because that attribute makes floating point and SIMD unavailable.
By implementing the canMergeStoresTo, we can prevent this incorrect
merging.

Fixes https://github.com/llvm/llvm-project/issues/186645

(cherry picked from commit 5651490992f3f5da7f39b228f019631725ff9d7f)



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