diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2011-07-17 15:36:56 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2011-07-17 15:36:56 +0000 |
| commit | 411bd29eea3c360d5b48a18a17b5e87f5671af0e (patch) | |
| tree | c8086addb211fa670a9d2b1038d8c2e453229755 /lib/CodeGen/DeadMachineInstructionElim.cpp | |
| parent | 56fe8f14099930935e3870e3e823c322a85c1c89 (diff) | |
Diffstat (limited to 'lib/CodeGen/DeadMachineInstructionElim.cpp')
| -rw-r--r-- | lib/CodeGen/DeadMachineInstructionElim.cpp | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/lib/CodeGen/DeadMachineInstructionElim.cpp b/lib/CodeGen/DeadMachineInstructionElim.cpp index fdc1d9142140..6de6c0cb81bd 100644 --- a/lib/CodeGen/DeadMachineInstructionElim.cpp +++ b/lib/CodeGen/DeadMachineInstructionElim.cpp @@ -110,9 +110,14 @@ bool DeadMachineInstructionElim::runOnMachineFunction(MachineFunction &MF) { LivePhysRegs.set(Reg); } - // FIXME: Add live-ins from sucessors to LivePhysRegs. Normally, physregs - // are not live across blocks, but some targets (x86) can have flags live - // out of a block. + // Add live-ins from sucessors to LivePhysRegs. Normally, physregs are not + // live across blocks, but some targets (x86) can have flags live out of a + // block. + for (MachineBasicBlock::succ_iterator S = MBB->succ_begin(), + E = MBB->succ_end(); S != E; S++) + for (MachineBasicBlock::livein_iterator LI = (*S)->livein_begin(); + LI != (*S)->livein_end(); LI++) + LivePhysRegs.set(*LI); // Now scan the instructions and delete dead ones, tracking physreg // liveness as we go. |