From 6524287c53cf727a8ef33517403fcb1bbd7adff9 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Thu, 2 Feb 2006 20:16:12 +0000
Subject: [PATCH] implement isStoreToStackSlot for PPC

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@25914 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/PowerPC/PPCInstrInfo.cpp | 19 ++++++++++++++++++-
 lib/Target/PowerPC/PPCInstrInfo.h   |  1 +
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 322d027504c..66251c0b232 100644
--- 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.
diff --git a/lib/Target/PowerPC/PPCInstrInfo.h b/lib/Target/PowerPC/PPCInstrInfo.h
index d0be2d6ba3e..f046e5dfb02 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.h
+++ b/lib/Target/PowerPC/PPCInstrInfo.h
@@ -40,6 +40,7 @@ public:
                            unsigned& destReg) const;
 
   unsigned isLoadFromStackSlot(MachineInstr *MI, int &FrameIndex) const;
+  unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
 
   // commuteInstruction - We can commute rlwimi instructions, but only if the
   // rotate amt is zero.  We also have to munge the immediates a bit.