fix most of remaining issues with large frames.

these patches are tested a lot by test-suite but
make check tests are forthcoming once the next
few patches that complete this are committed.
with the next few patches the pass rate for mips16 is
near 100%



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170656 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 27 insertions, 0 deletions

diff --git a/lib/Target/Mips/Mips16InstrInfo.h b/lib/Target/Mips/Mips16InstrInfo.h
index d6ef8d2bf183..16487e7937ee 100644
--- a/lib/Target/Mips/Mips16InstrInfo.h
+++ b/lib/Target/Mips/Mips16InstrInfo.h
@@ -64,15 +64,42 @@ public:
 
   virtual unsigned GetOppositeBranchOpc(unsigned Opc) const;
 
+  // Adjust SP by FrameSize bytes. Save RA, S0, S1
+  void makeFrame(unsigned SP, int64_t FrameSize, MachineBasicBlock &MBB,
+                      MachineBasicBlock::iterator I) const;
+
+  // Adjust SP by FrameSize bytes. Restore RA, S0, S1
+  void restoreFrame(unsigned SP, int64_t FrameSize, MachineBasicBlock &MBB,
+                      MachineBasicBlock::iterator I) const;
+
+
   /// Adjust SP by Amount bytes.
   void adjustStackPtr(unsigned SP, int64_t Amount, MachineBasicBlock &MBB,
                       MachineBasicBlock::iterator I) const;
 
+  /// Emit a series of instructions to load an immediate. If NewImm is a
+  /// non-NULL parameter, the last instruction is not emitted, but instead
+  /// its immediate operand is returned in NewImm.
+  unsigned loadImmediate(int64_t Imm, MachineBasicBlock &MBB,
+                         MachineBasicBlock::iterator II, DebugLoc DL,
+                         unsigned *NewImm) const;
+
 private:
   virtual unsigned GetAnalyzableBrOpc(unsigned Opc) const;
 
   void ExpandRetRA16(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
                    unsigned Opc) const;
+
+  // Adjust SP by Amount bytes where bytes can be up to 32bit number.
+  void adjustStackPtrBig(unsigned SP, int64_t Amount, MachineBasicBlock &MBB,
+                         MachineBasicBlock::iterator I,
+                         unsigned Reg1, unsigned Reg2) const;
+
+  // Adjust SP by Amount bytes where bytes can be up to 32bit number.
+  void adjustStackPtrBigUnrestricted(unsigned SP, int64_t Amount, MachineBasicBlock &MBB,
+                      MachineBasicBlock::iterator I) const;
+
+
 };
 
 }