[PATCH] D132181: [X86][AArch64][NFC] Simplify querying used argument registers

[Nick Desaulniers via Phabricator via llvm-commits]

nickdesaulniers accepted this revision.
nickdesaulniers added inline comments.
This revision is now accepted and ready to land.


================
Comment at: llvm/lib/CodeGen/PrologEpilogInserter.cpp:1211
+  BitVector LiveIns(TRI.getNumRegs());
+  for (const auto &LI : MF.front().liveins())
+    LiveIns.set(LI.PhysReg);
----------------
RegisterMaskPair


================
Comment at: llvm/lib/CodeGen/PrologEpilogInserter.cpp:1230-1234
+      if (OnlyUsed) {
+        if (!LiveIns[Reg])
+          continue;
+      } else if (!TRI.isArgumentRegister(MF, Reg)) {
+        continue;
----------------
This could probably be 2 statements rather than 5.
```
if ((OnlyUsed && !LiveIns[Reg]) || !TRI.isArgumentRegister(MF, Reg))
  continue;
```


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D132181/new/

https://reviews.llvm.org/D132181