[TableGen] Rename ResourceCycles and StartAtCycle to clarify semantics

D150312 added a TODO:

TODO: consider renaming the field `StartAtCycle` and `Cycles` to
`AcquireAtCycle` and `ReleaseAtCycle` respectively, to stress the
fact that resource allocation is now represented as an interval,
relatively to the issue cycle of the instruction.

This patch implements that TODO. This naming clarifies how to use these
fields in the scheduler. In addition it was confusing that `StartAtCycle` was
singular but `Cycles` was plural. This renaming fixes this inconsistency.

Differential Revision: https://reviews.llvm.org/D158568

1 files changed, 6 insertions, 6 deletions

diff --git a/llvm/lib/CodeGen/MachinePipeliner.cpp b/llvm/lib/CodeGen/MachinePipeliner.cpp
index c7e7497..adcbf65 100644
--- a/llvm/lib/CodeGen/MachinePipeliner.cpp
+++ b/llvm/lib/CodeGen/MachinePipeliner.cpp
@@ -1039,7 +1039,7 @@ struct FuncUnitSorter {
       for (const MCWriteProcResEntry &PRE :
            make_range(STI->getWriteProcResBegin(SCDesc),
                       STI->getWriteProcResEnd(SCDesc))) {
-        if (!PRE.Cycles)
+        if (!PRE.ReleaseAtCycle)
           continue;
         const MCProcResourceDesc *ProcResource =
             STI->getSchedModel().getProcResource(PRE.ProcResourceIdx);
@@ -1082,7 +1082,7 @@ struct FuncUnitSorter {
       for (const MCWriteProcResEntry &PRE :
            make_range(STI->getWriteProcResBegin(SCDesc),
                       STI->getWriteProcResEnd(SCDesc))) {
-        if (!PRE.Cycles)
+        if (!PRE.ReleaseAtCycle)
           continue;
         Resources[PRE.ProcResourceIdx]++;
       }
@@ -3092,7 +3092,7 @@ void ResourceManager::reserveResources(const MCSchedClassDesc *SCDesc,
   assert(!UseDFA);
   for (const MCWriteProcResEntry &PRE : make_range(
            STI->getWriteProcResBegin(SCDesc), STI->getWriteProcResEnd(SCDesc)))
-    for (int C = Cycle; C < Cycle + PRE.Cycles; ++C)
+    for (int C = Cycle; C < Cycle + PRE.ReleaseAtCycle; ++C)
       ++MRT[positiveModulo(C, InitiationInterval)][PRE.ProcResourceIdx];
 
   for (int C = Cycle; C < Cycle + SCDesc->NumMicroOps; ++C)
@@ -3104,7 +3104,7 @@ void ResourceManager::unreserveResources(const MCSchedClassDesc *SCDesc,
   assert(!UseDFA);
   for (const MCWriteProcResEntry &PRE : make_range(
            STI->getWriteProcResBegin(SCDesc), STI->getWriteProcResEnd(SCDesc)))
-    for (int C = Cycle; C < Cycle + PRE.Cycles; ++C)
+    for (int C = Cycle; C < Cycle + PRE.ReleaseAtCycle; ++C)
       --MRT[positiveModulo(C, InitiationInterval)][PRE.ProcResourceIdx];
 
   for (int C = Cycle; C < Cycle + SCDesc->NumMicroOps; ++C)
@@ -3220,10 +3220,10 @@ int ResourceManager::calculateResMII() const {
         if (SwpDebugResource) {
           const MCProcResourceDesc *Desc =
               SM.getProcResource(PRE.ProcResourceIdx);
-          dbgs() << Desc->Name << ": " << PRE.Cycles << ", ";
+          dbgs() << Desc->Name << ": " << PRE.ReleaseAtCycle << ", ";
         }
       });
-      ResourceCount[PRE.ProcResourceIdx] += PRE.Cycles;
+      ResourceCount[PRE.ProcResourceIdx] += PRE.ReleaseAtCycle;
     }
     LLVM_DEBUG(if (SwpDebugResource) dbgs() << "\n");
   }