[llvm] [SDAG] Drop select -> fmax/min folding in SelectionDAGBuilder (PR #93575)

[Yingwei Zheng via llvm-commits]

dtcxzyw wrote:

> Failed Tests (19):
  LLVM :: CodeGen/AMDGPU/fmed3.ll
  LLVM :: CodeGen/AMDGPU/reduction.ll
  LLVM :: CodeGen/ARM/fp16-vminmaxnm-safe.ll
  LLVM :: CodeGen/ARM/fp16-vminmaxnm-vector.ll
  LLVM :: CodeGen/ARM/fp16-vminmaxnm.ll
  LLVM :: CodeGen/ARM/minnum-maxnum-intrinsics.ll
  LLVM :: CodeGen/ARM/vminmaxnm-safe.ll
  LLVM :: CodeGen/ARM/vminmaxnm.ll
  LLVM :: CodeGen/PowerPC/vec-min-max.ll
  LLVM :: CodeGen/PowerPC/vector-reduce-fmax.ll
  LLVM :: CodeGen/PowerPC/vector-reduce-fmin.ll
  LLVM :: CodeGen/SystemZ/vec-max-05.ll
  LLVM :: CodeGen/SystemZ/vec-max-min-zerosplat.ll
  LLVM :: CodeGen/SystemZ/vec-min-05.ll
  LLVM :: CodeGen/Thumb2/mve-minmax.ll
  LLVM :: CodeGen/Thumb2/mve-pred-selectop.ll
  LLVM :: CodeGen/Thumb2/mve-pred-selectop2.ll
  LLVM :: CodeGen/Thumb2/mve-pred-selectop3.ll
  LLVM :: CodeGen/Thumb2/mve-vecreduce-fminmax.ll


https://github.com/llvm/llvm-project/pull/93575