[all-commits] [llvm/llvm-project] 558657: s390x: pattern match saturated truncation (#155377)

[Folkert de Vries via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 558657298a409e5988227e32116607507531c2d4
      https://github.com/llvm/llvm-project/commit/558657298a409e5988227e32116607507531c2d4
  Author: Folkert de Vries <folkert at folkertdev.nl>
  Date:   2025-08-26 (Tue, 26 Aug 2025)

  Changed paths:
    M llvm/lib/Target/SystemZ/SystemZISelLowering.cpp
    M llvm/lib/Target/SystemZ/SystemZInstrVector.td
    M llvm/lib/Target/SystemZ/SystemZOperators.td
    M llvm/test/CodeGen/SystemZ/int-max-02.ll
    M llvm/test/CodeGen/SystemZ/int-min-02.ll
    A llvm/test/CodeGen/SystemZ/saturating-truncation.ll

  Log Message:
  -----------
  s390x: pattern match saturated truncation (#155377)

Simplify min/max instruction matching by making the related
SelectionDAG operations legal.

Add patterns to match (signed and unsigned) saturated
truncation based on open-coded min/max patterns.

Fixes https://github.com/llvm/llvm-project/issues/153655



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