Cleaning up of prologue/epilogue code for Mips16. First step

here is to make save/restore into variable number of argument instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@196726 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 25 insertions, 0 deletions

diff --git a/lib/Target/Mips/InstPrinter/MipsInstPrinter.cpp b/lib/Target/Mips/InstPrinter/MipsInstPrinter.cpp
index 7884589899..c23fc6a6ed 100644
--- a/lib/Target/Mips/InstPrinter/MipsInstPrinter.cpp
+++ b/lib/Target/Mips/InstPrinter/MipsInstPrinter.cpp
@@ -83,6 +83,19 @@ void MipsInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
   case Mips::RDHWR64:
     O << "\t.set\tpush\n";
     O << "\t.set\tmips32r2\n";
+    break;
+  case Mips::Save16:
+  case Mips::SaveX16:
+    O << "\tsave\t";
+    printSaveRestore(MI, O);
+    O << "\n";
+    return;
+  case Mips::Restore16:
+  case Mips::RestoreX16:
+    O << "\trestore\t";
+    printSaveRestore(MI, O);
+    O << "\n";
+    return;
   }
 
   // Try to print any aliases first.
@@ -286,3 +299,14 @@ bool MipsInstPrinter::printAlias(const MCInst &MI, raw_ostream &OS) {
   default: return false;
   }
 }
+
+void MipsInstPrinter::printSaveRestore(const MCInst *MI, raw_ostream &O) {
+  for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
+    if (i != 0) O << ", ";
+    if (MI->getOperand(i).isReg())
+      printRegName(O, MI->getOperand(i).getReg());
+    else
+      printUnsignedImm(MI, i, O);
+  }
+}
+
diff --git a/lib/Target/Mips/InstPrinter/MipsInstPrinter.h b/lib/Target/Mips/InstPrinter/MipsInstPrinter.h
index f75ae249c3..2b745f028e 100644
--- a/lib/Target/Mips/InstPrinter/MipsInstPrinter.h
+++ b/lib/Target/Mips/InstPrinter/MipsInstPrinter.h
@@ -104,6 +104,7 @@ private:
   bool printAlias(const char *Str, const MCInst &MI, unsigned OpNo0,
                   unsigned OpNo1, raw_ostream &OS);
   bool printAlias(const MCInst &MI, raw_ostream &OS);
+  void printSaveRestore(const MCInst *MI, raw_ostream &O);
 };
 } // end namespace llvm