[lworld] C1's substitutability check does not respect UseCompressedClassPointers

--- a/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
+++ b/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
@@ -2078,7 +2078,7 @@ void LIR_Assembler::emit_opSubstitutabilityCheck(LIR_OpSubstitutabilityCheck* op
     Register left_klass_op = op->left_klass_op()->as_register();
     Register right_klass_op = op->right_klass_op()->as_register();
 
- if (UseCompressedOops) {
+ if (UseCompressedClassPointers) {