[Hexagon] Update MCTargetDesc

Changes include:
- Updates to the instruction descriptor flags.
- Improvements to the packet shuffler and checker.
- Updates to the handling of certain relocations.
- Better handling of duplex instructions.

llvm-svn: 294226

1 files changed, 19 insertions, 3 deletions

diff --git a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCCompound.cpp b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCCompound.cpp
index 9a09a17767a..ffa980ca656 100644
--- a/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCCompound.cpp
+++ b/llvm/lib/Target/Hexagon/MCTargetDesc/HexagonMCCompound.cpp
@@ -14,6 +14,7 @@
 #include "Hexagon.h"
 #include "MCTargetDesc/HexagonBaseInfo.h"
 #include "MCTargetDesc/HexagonMCInstrInfo.h"
+#include "MCTargetDesc/HexagonMCShuffler.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCInst.h"
 #include "llvm/Support/Debug.h"
@@ -396,7 +397,7 @@ static bool lookForCompound(MCInstrInfo const &MCII, MCContext &Context,
 /// is found update the contents fo the bundle with the compound insn.
 /// If a compound instruction is found then the bundle will have one
 /// additional slot.
-void HexagonMCInstrInfo::tryCompound(MCInstrInfo const &MCII,
+void HexagonMCInstrInfo::tryCompound(MCInstrInfo const &MCII, MCSubtargetInfo const &STI,
                                      MCContext &Context, MCInst &MCI) {
   assert(HexagonMCInstrInfo::isBundle(MCI) &&
          "Non-Bundle where Bundle expected");
@@ -405,8 +406,23 @@ void HexagonMCInstrInfo::tryCompound(MCInstrInfo const &MCII,
   if (MCI.size() < 2)
     return;
 
+  bool StartedValid = llvm::HexagonMCShuffle(false, MCII, STI, MCI);
+
+  // Create a vector, needed to keep the order of jump instructions.
+  MCInst CheckList(MCI);
+
   // Look for compounds until none are found, only update the bundle when
   // a compound is found.
-  while (lookForCompound(MCII, Context, MCI))
-    ;
+  while (lookForCompound(MCII, Context, CheckList)) {
+    // Keep the original bundle around in case the shuffle fails.
+    MCInst OriginalBundle(MCI);
+
+    // Need to update the bundle.
+    MCI = CheckList;
+
+    if (StartedValid && !llvm::HexagonMCShuffle(false, MCII, STI, MCI)) {
+      DEBUG(dbgs() << "Found ERROR\n");
+      MCI = OriginalBundle;
+    }
+  }
 }