From: Andrew Trick <atrick@apple.com>
Date: Wed, 10 Oct 2012 05:43:04 +0000 (+0000)
Subject: misched: Generate IsBuffered flag for machine resources.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=6312cb099734263f348f36a31b8892b1373a7076;p=oota-llvm.git

misched: Generate IsBuffered flag for machine resources.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165602 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/MC/MCSchedule.h b/include/llvm/MC/MCSchedule.h
index 41bdb02f615..0504dc13c8f 100644
--- a/include/llvm/MC/MCSchedule.h
+++ b/include/llvm/MC/MCSchedule.h
@@ -27,11 +27,18 @@ struct MCProcResourceDesc {
 #ifndef NDEBUG
   const char *Name;
 #endif
-  unsigned Count; // Number of resource of this kind
+  unsigned NumUnits; // Number of resource of this kind
   unsigned SuperIdx; // Index of the resources kind that contains this kind.
 
+  // Buffered resources may be consumed at some indeterminate cycle after
+  // dispatch (e.g. for instructions that may issue out-of-order). Unbuffered
+  // resources always consume their resource some fixed number of cycles after
+  // dispatch (e.g. for instruction interlocking that may stall the pipeline).
+  bool IsBuffered;
+
   bool operator==(const MCProcResourceDesc &Other) const {
-    return Count == Other.Count && SuperIdx == Other.SuperIdx;
+    return NumUnits == Other.NumUnits && SuperIdx == Other.SuperIdx
+      && IsBuffered == Other.IsBuffered;
   }
 };
 
diff --git a/utils/TableGen/SubtargetEmitter.cpp b/utils/TableGen/SubtargetEmitter.cpp
index 6ffdeb45e19..ac833a54a77 100644
--- a/utils/TableGen/SubtargetEmitter.cpp
+++ b/utils/TableGen/SubtargetEmitter.cpp
@@ -623,10 +623,10 @@ void SubtargetEmitter::EmitProcessorResources(const CodeGenProcModel &ProcModel,
                                               raw_ostream &OS) {
   char Sep = ProcModel.ProcResourceDefs.empty() ? ' ' : ',';
 
-  OS << "\n// {Name, NumUnits, SuperIdx}\n";
+  OS << "\n// {Name, NumUnits, SuperIdx, IsBuffered}\n";
   OS << "static const llvm::MCProcResourceDesc "
      << ProcModel.ModelName << "ProcResources" << "[] = {\n"
-     << "  {DBGFIELD(\"InvalidUnit\")     0, 0}" << Sep << "\n";
+     << "  {DBGFIELD(\"InvalidUnit\")     0, 0, 0}" << Sep << "\n";
 
   for (unsigned i = 0, e = ProcModel.ProcResourceDefs.size(); i < e; ++i) {
     Record *PRDef = ProcModel.ProcResourceDefs[i];
@@ -645,8 +645,8 @@ void SubtargetEmitter::EmitProcessorResources(const CodeGenProcModel &ProcModel,
     OS << "  {DBGFIELD(\"" << PRDef->getName() << "\") ";
     if (PRDef->getName().size() < 15)
       OS.indent(15 - PRDef->getName().size());
-    OS << PRDef->getValueAsInt("NumUnits") << ", " << SuperIdx
-       << "}" << Sep << " // #" << i+1;
+    OS << PRDef->getValueAsInt("NumUnits") << ", " << SuperIdx << ", "
+       << PRDef->getValueAsBit("Buffered") << "}" << Sep << " // #" << i+1;
     if (SuperDef)
       OS << ", Super=" << SuperDef->getName();
     OS << "\n";