Beginning of expanding all current mips16 macro/pseudo instruction sequences.

This expansion will be moved to expandISelPseudos as soon as I can figure
out how to do that. There are other instructions which use this 
ExpandFEXT_T8I816_ins and as soon as I have finished expanding them all,
I will delete the macro asm string text so it has no way to be used
in the future.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175413 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 15 insertions, 0 deletions

diff --git a/lib/Target/Mips/Mips16InstrInfo.cpp b/lib/Target/Mips/Mips16InstrInfo.cpp
index 0612335c2b..721af26b27 100644
--- a/lib/Target/Mips/Mips16InstrInfo.cpp
+++ b/lib/Target/Mips/Mips16InstrInfo.cpp
@@ -21,6 +21,7 @@
 #include "llvm/CodeGen/MachineRegisterInfo.h"
 #include "llvm/CodeGen/RegisterScavenging.h"
 #include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/TargetRegistry.h"
 
@@ -135,6 +136,9 @@ bool Mips16InstrInfo::expandPostRAPseudo(MachineBasicBlock::iterator MI) const {
   switch(MI->getDesc().getOpcode()) {
   default:
     return false;
+  case Mips::BtnezT8CmpX16:
+    ExpandFEXT_T8I816_ins(MBB, MI, Mips::BtnezX16, Mips::CmpRxRy16);
+    break;
   case Mips::RetRA16:
     ExpandRetRA16(MBB, MI, Mips::JrcRa16);
     break;
@@ -399,6 +403,17 @@ void Mips16InstrInfo::ExpandRetRA16(MachineBasicBlock &MBB,
   BuildMI(MBB, I, I->getDebugLoc(), get(Opc));
 }
 
+
+void Mips16InstrInfo::ExpandFEXT_T8I816_ins(
+  MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
+  unsigned BtOpc, unsigned CmpOpc) const {
+  unsigned regX = I->getOperand(0).getReg();
+  unsigned regY = I->getOperand(1).getReg();
+  MachineBasicBlock *target = I->getOperand(2).getMBB();
+  BuildMI(MBB, I, I->getDebugLoc(), get(CmpOpc)).addReg(regX).addReg(regY);
+  BuildMI(MBB, I, I->getDebugLoc(), get(BtOpc)).addMBB(target);
+
+}
 const MCInstrDesc &Mips16InstrInfo::AddiuSpImm(int64_t Imm) const {
   if (validSpImm8(Imm))
     return get(Mips::AddiuSpImm16);