Revert rL371198 from llvm/trunk: [DFAPacketizer] Track resources for packetized instructions

This patch allows the DFAPacketizer to be queried after a packet is formed to work out which
resources were allocated to the packetized instructions.

This is particularly important for targets that do their own bundle packing - it's not
sufficient to know simply that instructions can share a packet; which slots are used is
also required for encoding.

This extends the emitter to emit a side-table containing resource usage diffs for each
state transition. The packetizer maintains a set of all possible resource states in its
current state. After packetization is complete, all remaining resource states are
possible packetization strategies.

The sidetable is only ~500K for Hexagon, but the extra tracking is disabled by default
(most uses of the packetizer like MachinePipeliner don't care and don't need the extra
maintained state).

Differential Revision: https://reviews.llvm.org/D66936
........
Reverted as this is causing "compiler out of heap space" errors on MSVC 2017/19 NDEBUG builds

llvm-svn: 371393

1 files changed, 0 insertions, 11 deletions

diff --git a/llvm/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp b/llvm/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
index 7024dafd479..c89c0b3369f 100644
--- a/llvm/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonVLIWPacketizer.cpp
@@ -24,7 +24,6 @@
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/StringExtras.h"
 #include "llvm/Analysis/AliasAnalysis.h"
 #include "llvm/CodeGen/MachineBasicBlock.h"
 #include "llvm/CodeGen/MachineBranchProbabilityInfo.h"
@@ -1764,16 +1763,6 @@ HexagonPacketizerList::addToPacket(MachineInstr &MI) {
 void HexagonPacketizerList::endPacket(MachineBasicBlock *MBB,
                                       MachineBasicBlock::iterator EndMI) {
   // Replace VLIWPacketizerList::endPacket(MBB, EndMI).
-  LLVM_DEBUG({
-    if (!CurrentPacketMIs.empty()) {
-      dbgs() << "Finalizing packet:\n";
-      unsigned Idx = 0;
-      for (MachineInstr *MI : CurrentPacketMIs) {
-        unsigned R = ResourceTracker->getUsedResources(Idx++);
-        dbgs() << " * [res:0x" << utohexstr(R) << "] " << *MI;
-      }
-    }
-  });
 
   bool memShufDisabled = getmemShufDisabled();
   if (memShufDisabled && !foundLSInPacket()) {