[PATCH] D81900: Add coverage for inexact constant folding for multiplication in Selection DAG

[Michael Berg via Phabricator via llvm-commits]

mcberg2017 created this revision.
mcberg2017 added reviewers: spatel, arsenm, foad, scanon.
Herald added subscribers: llvm-commits, kerbowa, hiraditya, nhaehnle, wdng, jvesely, nemanjai.
Herald added a project: LLVM.

Guard constant folding using inexact testing before forwarding results, also allow Unsafe to gate the optimization. This functionality was initially added to GlobalIsel internally at Apple.  We are porting it into SDAG for general use.  Others may want to port it back into their GlobalIsel representation after the fact.  The modified tests primarily record the difference in inexact constant folding.


https://reviews.llvm.org/D81900

Files:
  llvm/include/llvm/CodeGen/SelectionDAG.h
  llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  llvm/test/CodeGen/AArch64/select_const.ll
  llvm/test/CodeGen/AMDGPU/llvm.sin.ll
  llvm/test/CodeGen/PowerPC/select_const.ll
  llvm/test/CodeGen/X86/gpu-codegen-combine-fmul-to-cst_inexact.ll
  llvm/test/CodeGen/X86/select_const.ll

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