Move isLoadFrom/StoreToStackSlot from MRegisterInfo to TargetInstrInfo,a far more logical place. Other methods should also be moved if anyoneis interested. :)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25913 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index f1cd9f56d7..322d027504 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -79,6 +79,25 @@ bool PPCInstrInfo::isMoveInstr(const MachineInstr& MI,
   return false;
 }
 
+unsigned PPCInstrInfo::isLoadFromStackSlot(MachineInstr *MI, 
+                                              int &FrameIndex) const {
+  switch (MI->getOpcode()) {
+  default: break;
+  case PPC::LD:
+  case PPC::LWZ:
+  case PPC::LFS:
+  case PPC::LFD:
+    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.
 MachineInstr *PPCInstrInfo::commuteInstruction(MachineInstr *MI) const {