Define function MipsInstrInfo::GetInstSizeInBytes, which will be called to

compute the size of basic blocks in a function. Also, define a function which
emits a series of instructions to load an immediate.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158429 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 20 insertions, 6 deletions

diff --git a/lib/Target/Mips/MipsInstrInfo.h b/lib/Target/Mips/MipsInstrInfo.h
index 51cc9afdfa..7a0065b634 100644
--- a/lib/Target/Mips/MipsInstrInfo.h
+++ b/lib/Target/Mips/MipsInstrInfo.h
@@ -15,6 +15,7 @@
 #define MIPSINSTRUCTIONINFO_H
 
 #include "Mips.h"
+#include "MipsAnalyzeImmediate.h"
 #include "MipsRegisterInfo.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Target/TargetInstrInfo.h"
@@ -24,12 +25,6 @@
 
 namespace llvm {
 
-namespace Mips {
-  /// GetOppositeBranchOpc - Return the inverse of the specified
-  /// opcode, e.g. turning BEQ to BNE.
-  unsigned GetOppositeBranchOpc(unsigned Opc);
-}
-
 class MipsInstrInfo : public MipsGenInstrInfo {
   MipsTargetMachine &TM;
   bool IsN64;
@@ -109,8 +104,27 @@ public:
   /// Insert nop instruction when hazard condition is found
   virtual void insertNoop(MachineBasicBlock &MBB,
                           MachineBasicBlock::iterator MI) const;
+
+  /// Return the number of bytes of code the specified instruction may be.
+  unsigned GetInstSizeInBytes(const MachineInstr *MI) const;
 };
 
+namespace Mips {
+  /// GetOppositeBranchOpc - Return the inverse of the specified
+  /// opcode, e.g. turning BEQ to BNE.
+  unsigned GetOppositeBranchOpc(unsigned Opc);
+
+  /// Emit a series of instructions to load an immediate. All instructions
+  /// except for the last one are emitted. The function returns the number of
+  /// MachineInstrs generated. The opcode-immediate pair of the last
+  /// instruction is returned in LastInst, if it is not 0.
+  unsigned
+  loadImmediate(int64_t Imm, bool IsN64, const TargetInstrInfo &TII,
+                MachineBasicBlock& MBB, MachineBasicBlock::iterator II,
+                DebugLoc DL, bool LastInstrIsADDiu,
+                MipsAnalyzeImmediate::Inst *LastInst);
+}
+
 }
 
 #endif