[PATCH] D139283: [llvm-exegesis] parallel snippet generator: avoid Read-After-Write pitfail for instrs w/ tied variables

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added inline comments.


================
Comment at: llvm/tools/llvm-exegesis/lib/ParallelSnippetGenerator.cpp:158
+
+  if (Op.isUse()) {
+    switch (S) {
----------------
One thing i was thinking of, are there cases where we have
both defs with tied uses AND defs without tied uses?
If we have (which instruction is that?),
should we just always reuse the reg for defs without tied uses?


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D139283/new/

https://reviews.llvm.org/D139283