skip empty regMask in verifyRegistersUsed (dotnet/coreclr#18415)

Commit migrated from https://github.com/dotnet/coreclr/commit/5c556d13b09e8f7c702da04d8ab2ece8ef9b71a6

diff --git a/src/coreclr/src/jit/regset.cpp b/src/coreclr/src/jit/regset.cpp
index 2bec96f..1ff5ee0 100644 (file)
--- a/src/coreclr/src/jit/regset.cpp
+++ b/src/coreclr/src/jit/regset.cpp
@@ -95,6 +95,11 @@ void RegSet::verifyRegistersUsed(regMaskTP regMask)
         return;
     }
 
+    if (regMask == RBM_NONE)
+    {
+        return;
+    }
+
     // TODO-Cleanup: we need to identify the places where the registers
     //               are not marked as used when this is called.
     rsSetRegsModified(regMask);