diff options
| author | Nate Begeman <natebegeman@mac.com> | 2006-03-17 01:40:33 +0000 |
|---|---|---|
| committer | Nate Begeman <natebegeman@mac.com> | 2006-03-17 01:40:33 +0000 |
| commit | 81e8097377529dc3b666f33bb525c49cfbac3f51 (patch) | |
| tree | d4c33c3ef954f50671fef38cf13ac1a26c4b95ab /lib/Target/PowerPC/PPCBranchSelector.cpp | |
| parent | e261c474cac3fe1ca5bb8528c150095ffb81bbca (diff) | |
Remove BRTWOWAY*
Make the PPC backend not dependent on BRTWOWAY_CC and make the branch
selector smarter about the code it generates, fixing a case in the
readme.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26814 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCBranchSelector.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCBranchSelector.cpp | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/lib/Target/PowerPC/PPCBranchSelector.cpp b/lib/Target/PowerPC/PPCBranchSelector.cpp index e7fce56b20..543c390037 100644 --- a/lib/Target/PowerPC/PPCBranchSelector.cpp +++ b/lib/Target/PowerPC/PPCBranchSelector.cpp @@ -48,10 +48,10 @@ FunctionPass *llvm::createPPCBranchSelectionPass() { static unsigned getNumBytesForInstruction(MachineInstr *MI) { switch (MI->getOpcode()) { case PPC::COND_BRANCH: - // while this will be 4 most of the time, if we emit 12 it is just a + // while this will be 4 most of the time, if we emit 8 it is just a // minor pessimization that saves us from having to worry about // keeping the offsets up to date later when we emit long branch glue. - return 12; + return 8; case PPC::IMPLICIT_DEF_GPR: // no asm emitted case PPC::IMPLICIT_DEF_F4: // no asm emitted case PPC::IMPLICIT_DEF_F8: // no asm emitted @@ -102,7 +102,6 @@ bool PPCBSel::runOnMachineFunction(MachineFunction &Fn) { // long branch: // bInverseCC $PC+8 // b .L_TARGET_MBB - // b .L_FALLTHROUGH_MBB for (MachineFunction::iterator MFI = Fn.begin(), E = Fn.end(); MFI != E; ++MFI) { MachineBasicBlock *MBB = MFI; @@ -123,8 +122,6 @@ bool PPCBSel::runOnMachineFunction(MachineFunction &Fn) { // 3. fallthrough MBB MachineBasicBlock *trueMBB = MBBI->getOperand(2).getMachineBasicBlock(); - MachineBasicBlock *falseMBB = - MBBI->getOperand(3).getMachineBasicBlock(); int Displacement = OffsetMap[trueMBB] - ByteCount; unsigned Opcode = MBBI->getOperand(1).getImmedValue(); @@ -136,7 +133,6 @@ bool PPCBSel::runOnMachineFunction(MachineFunction &Fn) { } else { BuildMI(*MBB, MBBJ, Inverted, 2).addReg(CRReg).addSImm(8); BuildMI(*MBB, MBBJ, PPC::B, 1).addMBB(trueMBB); - BuildMI(*MBB, MBBJ, PPC::B, 1).addMBB(falseMBB); } // Erase the psuedo COND_BRANCH instruction, and then back up the |