[PATCH] D119436: RFC: RegAlloc: Avoid repeated calls to freezeReservedRegs

[Jay Foad via Phabricator via llvm-commits]

foad updated this revision to Diff 407788.
foad added a comment.

Simplify.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D119436/new/

https://reviews.llvm.org/D119436

Files:
  llvm/lib/CodeGen/RegAllocBase.cpp


Index: llvm/lib/CodeGen/RegAllocBase.cpp
===================================================================
--- llvm/lib/CodeGen/RegAllocBase.cpp
+++ llvm/lib/CodeGen/RegAllocBase.cpp
@@ -61,7 +61,14 @@
   VRM = &vrm;
   LIS = &lis;
   Matrix = &mat;
+#ifndef NDEBUG
+  BitVector OldReservedRegs(MRI->getReservedRegs());
+#endif
   MRI->freezeReservedRegs(vrm.getMachineFunction());
+#ifndef NDEBUG
+  assert(OldReservedRegs == MRI->getReservedRegs() &&
+         "Frozen reserved regs should not have changed!");
+#endif
   RegClassInfo.runOnMachineFunction(vrm.getMachineFunction());
 }
 


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