Fix fallout from RegInfo => FrameLowering refactoring on MSP430.

Patch by Job Noorman!

llvm-svn: 166108

lib/Target/MSP430/MSP430FrameLowering.cpp

@@ -221,3 +221,17 @@ MSP430FrameLowering::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
 
   return true;
 }
+
+void
+MSP430FrameLowering::processFunctionBeforeFrameFinalized(MachineFunction &MF)
+                                                                         const {
+  const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
+
+  // Create a frame entry for the FPW register that must be saved.
+  if (TFI->hasFP(MF)) {
+    int FrameIdx = MF.getFrameInfo()->CreateFixedObject(2, -4, true);
+    (void)FrameIdx;
+    assert(FrameIdx == MF.getFrameInfo()->getObjectIndexBegin() &&
+           "Slot for FPW register must be last in order to be found!");
+  }
+}

lib/Target/MSP430/MSP430FrameLowering.h

@@ -46,6 +46,7 @@ public:
 
   bool hasFP(const MachineFunction &MF) const;
   bool hasReservedCallFrame(const MachineFunction &MF) const;
+  void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
 };
 
 } // End llvm namespace

lib/Target/MSP430/MSP430RegisterInfo.cpp

@@ -220,20 +220,6 @@ MSP430RegisterInfo::eliminateFrameIndex(MachineBasicBlock::iterator II,
   MI.getOperand(i+1).ChangeToImmediate(Offset);
 }
 
-void
-MSP430RegisterInfo::processFunctionBeforeFrameFinalized(MachineFunction &MF)
-                                                                         const {
-  const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
-
-  // Create a frame entry for the FPW register that must be saved.
-  if (TFI->hasFP(MF)) {
-    int FrameIdx = MF.getFrameInfo()->CreateFixedObject(2, -4, true);
-    (void)FrameIdx;
-    assert(FrameIdx == MF.getFrameInfo()->getObjectIndexBegin() &&
-           "Slot for FPW register must be last in order to be found!");
-  }
-}
-
 unsigned MSP430RegisterInfo::getFrameRegister(const MachineFunction &MF) const {
   const TargetFrameLowering *TFI = MF.getTarget().getFrameLowering();
 

lib/Target/MSP430/MSP430RegisterInfo.h

@@ -49,8 +49,6 @@ public:
   void eliminateFrameIndex(MachineBasicBlock::iterator II,
                            int SPAdj, RegScavenger *RS = NULL) const;
 
-  void processFunctionBeforeFrameFinalized(MachineFunction &MF) const;
-
   // Debug information queries.
   unsigned getFrameRegister(const MachineFunction &MF) const;
 };

test/CodeGen/MSP430/fp.ll

@@ -0,0 +1,17 @@
+; RUN: llc -O0 -disable-fp-elim < %s | FileCheck %s
+
+target datalayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:16:32-n8:16"
+target triple = "msp430---elf"
+
+define void @fp() nounwind {
+entry:
+; CHECK: fp:
+; CHECK: push.w r4
+; CHECK: mov.w r1, r4
+; CHECK: sub.w #2, r1
+  %i = alloca i16, align 2
+; CHECK: mov.w #0, -2(r4)
+  store i16 0, i16* %i, align 2
+; CHECK: pop.w r4
+  ret void
+}