[llvm-mca] A write latency cannot be a negative value. NFC

llvm-svn: 336437
diff --git a/llvm/tools/llvm-mca/Instruction.cpp b/llvm/tools/llvm-mca/Instruction.cpp
index dbf2d5f..53f0d67 100644
--- a/llvm/tools/llvm-mca/Instruction.cpp
+++ b/llvm/tools/llvm-mca/Instruction.cpp
@@ -41,7 +41,7 @@
 void WriteState::onInstructionIssued() {
   assert(CyclesLeft == UNKNOWN_CYCLES);
   // Update the number of cycles left based on the WriteDescriptor info.
-  CyclesLeft = WD.Latency;
+  CyclesLeft = getLatency();
 
   // Now that the time left before write-back is known, notify
   // all the users.
@@ -93,7 +93,7 @@
 
 #ifndef NDEBUG
 void WriteState::dump() const {
-  dbgs() << "{ OpIdx=" << WD.OpIndex << ", Lat=" << WD.Latency << ", RegID "
+  dbgs() << "{ OpIdx=" << WD.OpIndex << ", Lat=" << getLatency() << ", RegID "
          << getRegisterID() << ", Cycles Left=" << getCyclesLeft() << " }";
 }