implement isStoreToStackSlot for PPC

[oota-llvm.git] / lib / Target / PowerPC / PPCInstrInfo.cpp

diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 322d027504cffcbed2da9cbc72e7a4b6b8b76e02..66251c0b23208d2701727ca69efba34894064f15 100644 (file)
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -95,8 +95,25 @@ unsigned PPCInstrInfo::isLoadFromStackSlot(MachineInstr *MI,
     break;
   }
   return 0;
-                                              }
+}
 
+unsigned PPCInstrInfo::isStoreToStackSlot(MachineInstr *MI, 
+                                          int &FrameIndex) const {
+  switch (MI->getOpcode()) {
+  default: break;
+  //case PPC::ST:  ?
+  case PPC::STW:
+  case PPC::STFS:
+  case PPC::STFD:
+    if (MI->getOperand(1).isImmediate() && !MI->getOperand(1).getImmedValue() &&
+        MI->getOperand(2).isFrameIndex()) {
+      FrameIndex = MI->getOperand(2).getFrameIndex();
+      return MI->getOperand(0).getReg();
+    }
+    break;
+  }
+  return 0;
+}
 
 // commuteInstruction - We can commute rlwimi instructions, but only if the
 // rotate amt is zero.  We also have to munge the immediates a bit.