[all-commits] [llvm/llvm-project] abac5b: [InstCombine] Fix APInt ctor assertion

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: abac5be673a2053cceab8ce25009722e45021b9f
      https://github.com/llvm/llvm-project/commit/abac5be673a2053cceab8ce25009722e45021b9f
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2024-11-19 (Tue, 19 Nov 2024)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineAddSub.cpp
    M llvm/test/Transforms/InstCombine/conditional-variable-length-signext-after-high-bit-extract.ll

  Log Message:
  -----------
  [InstCombine] Fix APInt ctor assertion

The (extended) bit width might not fit into the (non-extended)
type, resulting in an incorrect truncation of the compared value.

Fix this by using m_SpecificInt(), which is both simpler and
handles this correctly.

Fixes the assertion failure reported in:
https://github.com/llvm/llvm-project/pull/114539#issuecomment-2485799395



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