Author: bruno
Date: Fri Aug 17 20:59:45 2007
New Revision: 41155
URL: http://llvm.org/viewvc/llvm-project?rev=41155&view=rev
Log:
Branch Analysis and InsertNoop inserted into header files
Modified:
llvm/trunk/lib/Target/Mips/MipsInstrInfo.h
Modified: llvm/trunk/lib/Target/Mips/MipsInstrInfo.h
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsInstrInfo.h?rev=41155&r1=41154&r2=41155&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsInstrInfo.h (original)
+++ llvm/trunk/lib/Target/Mips/MipsInstrInfo.h Fri Aug 17 20:59:45 2007
@@ -20,6 +20,29 @@
namespace llvm {
+namespace Mips {
+
+ // All CC branch operations on Mips I are turned
+ // into BEQ and BNE CC branches instructions.
+ enum CondCode {
+ COND_E,
+ COND_GZ,
+ COND_GEZ,
+ COND_LZ,
+ COND_LEZ,
+ COND_NE,
+ COND_INVALID
+ };
+
+ // Turn condition code into conditional branch opcode.
+ unsigned GetCondBranchFromCond(CondCode CC);
+
+ /// GetOppositeBranchCondition - Return the inverse of the specified cond,
+ /// e.g. turning COND_E to COND_NE.
+ CondCode GetOppositeBranchCondition(Mips::CondCode CC);
+
+}
+
class MipsInstrInfo : public TargetInstrInfo
{
MipsTargetMachine &TM;
@@ -52,10 +75,21 @@
/// not, return 0. This predicate must return 0 if the instruction has
/// any side effects other than storing to the stack slot.
virtual unsigned isStoreToStackSlot(MachineInstr *MI, int &FrameIndex) const;
-
+
+ /// Branch Analysis
+ virtual bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
+ MachineBasicBlock *&FBB,
+ std::vector<MachineOperand> &Cond) const;
+ virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const;
virtual unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
- MachineBasicBlock *FBB,
+ MachineBasicBlock *FBB,
const std::vector<MachineOperand> &Cond) const;
+ virtual bool BlockHasNoFallThrough(MachineBasicBlock &MBB) const;
+ virtual bool ReverseBranchCondition(std::vector<MachineOperand> &Cond) const;
+
+ /// Insert nop instruction when hazard condition is found
+ virtual void insertNoop(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator MI) const;
};
}
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