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| author | Wesley Peck <peckw@wesleypeck.com> | 2010-12-02 16:17:11 +0000 |
|---|---|---|
| committer | Wesley Peck <peckw@wesleypeck.com> | 2010-12-02 16:17:11 +0000 |
| commit | 2e06398405c61d6d2aa99785fe34d34c33808330 (patch) | |
| tree | aae9084cec2d4682244988348422fc990c8c8be9 | |
| parent | 5d87255969560d47c08db9382ef3d3fa70fe3ec2 (diff) | |
| download | external_llvm-2e06398405c61d6d2aa99785fe34d34c33808330.tar.gz external_llvm-2e06398405c61d6d2aa99785fe34d34c33808330.tar.bz2 external_llvm-2e06398405c61d6d2aa99785fe34d34c33808330.zip | |
Teaching MBlaze backend how to reverse branch conditions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120707 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/MBlaze/MBlazeInstrInfo.cpp | 30 | ||||
| -rw-r--r-- | lib/Target/MBlaze/MBlazeInstrInfo.h | 5 |
2 files changed, 35 insertions, 0 deletions
diff --git a/lib/Target/MBlaze/MBlazeInstrInfo.cpp b/lib/Target/MBlaze/MBlazeInstrInfo.cpp index d7c11f2a69..57c03feb97 100644 --- a/lib/Target/MBlaze/MBlazeInstrInfo.cpp +++ b/lib/Target/MBlaze/MBlazeInstrInfo.cpp @@ -234,6 +234,36 @@ unsigned MBlazeInstrInfo::RemoveBranch(MachineBasicBlock &MBB) const { return 2; } +bool MBlazeInstrInfo::ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const { + assert(Cond.size() == 2 && "Invalid MBlaze branch opcode!"); + switch (Cond[0].getImm()) { + default: return true; + case MBlaze::BEQ: Cond[0].setImm(MBlaze::BNE); return false; + case MBlaze::BNE: Cond[0].setImm(MBlaze::BEQ); return false; + case MBlaze::BGT: Cond[0].setImm(MBlaze::BLE); return false; + case MBlaze::BGE: Cond[0].setImm(MBlaze::BLT); return false; + case MBlaze::BLT: Cond[0].setImm(MBlaze::BGE); return false; + case MBlaze::BLE: Cond[0].setImm(MBlaze::BGT); return false; + case MBlaze::BEQI: Cond[0].setImm(MBlaze::BNEI); return false; + case MBlaze::BNEI: Cond[0].setImm(MBlaze::BEQI); return false; + case MBlaze::BGTI: Cond[0].setImm(MBlaze::BLEI); return false; + case MBlaze::BGEI: Cond[0].setImm(MBlaze::BLTI); return false; + case MBlaze::BLTI: Cond[0].setImm(MBlaze::BGEI); return false; + case MBlaze::BLEI: Cond[0].setImm(MBlaze::BGTI); return false; + case MBlaze::BEQD: Cond[0].setImm(MBlaze::BNED); return false; + case MBlaze::BNED: Cond[0].setImm(MBlaze::BEQD); return false; + case MBlaze::BGTD: Cond[0].setImm(MBlaze::BLED); return false; + case MBlaze::BGED: Cond[0].setImm(MBlaze::BLTD); return false; + case MBlaze::BLTD: Cond[0].setImm(MBlaze::BGED); return false; + case MBlaze::BLED: Cond[0].setImm(MBlaze::BGTD); return false; + case MBlaze::BEQID: Cond[0].setImm(MBlaze::BNEID); return false; + case MBlaze::BNEID: Cond[0].setImm(MBlaze::BEQID); return false; + case MBlaze::BGTID: Cond[0].setImm(MBlaze::BLEID); return false; + case MBlaze::BGEID: Cond[0].setImm(MBlaze::BLTID); return false; + case MBlaze::BLTID: Cond[0].setImm(MBlaze::BGEID); return false; + case MBlaze::BLEID: Cond[0].setImm(MBlaze::BGTID); return false; + } +} /// getGlobalBaseReg - Return a virtual register initialized with the /// the global base register value. Output instructions required to diff --git a/lib/Target/MBlaze/MBlazeInstrInfo.h b/lib/Target/MBlaze/MBlazeInstrInfo.h index 91392f92e4..b7300c1408 100644 --- a/lib/Target/MBlaze/MBlazeInstrInfo.h +++ b/lib/Target/MBlaze/MBlazeInstrInfo.h @@ -257,6 +257,11 @@ public: const SmallVectorImpl<MachineOperand> &Cond, DebugLoc DL) const; virtual unsigned RemoveBranch(MachineBasicBlock &MBB) const; + + virtual bool ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) + const; + + virtual void copyPhysReg(MachineBasicBlock &MBB, MachineBasicBlock::iterator I, DebugLoc DL, unsigned DestReg, unsigned SrcReg, |