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author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-02-02 23:52:57 +0000 |
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committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-02-02 23:52:57 +0000 |
commit | 478a8a02bc0f2e739ed8f4240152e99837e480b9 (patch) | |
tree | 47ab92f4d7d9d548d79b78837040b3da3ccba482 /lib/CodeGen/DeadMachineInstructionElim.cpp | |
parent | 2e5b88e3cbb9438b5b9d3a1dc499b11a144ca7d2 (diff) | |
download | external_llvm-478a8a02bc0f2e739ed8f4240152e99837e480b9.zip external_llvm-478a8a02bc0f2e739ed8f4240152e99837e480b9.tar.gz external_llvm-478a8a02bc0f2e739ed8f4240152e99837e480b9.tar.bz2 |
Require non-NULL register masks.
It doesn't seem worthwhile to give meaning to a NULL register mask
pointer. It complicates all the code using register mask operands.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149646 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/DeadMachineInstructionElim.cpp')
-rw-r--r-- | lib/CodeGen/DeadMachineInstructionElim.cpp | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/lib/CodeGen/DeadMachineInstructionElim.cpp b/lib/CodeGen/DeadMachineInstructionElim.cpp index aeb0b3e..020b64d8 100644 --- a/lib/CodeGen/DeadMachineInstructionElim.cpp +++ b/lib/CodeGen/DeadMachineInstructionElim.cpp @@ -175,10 +175,7 @@ bool DeadMachineInstructionElim::runOnMachineFunction(MachineFunction &MF) { } } else if (MO.isRegMask()) { // Register mask of preserved registers. All clobbers are dead. - if (const uint32_t *Mask = MO.getRegMask()) - LivePhysRegs.clearBitsNotInMask(Mask); - else - LivePhysRegs.reset(); + LivePhysRegs.clearBitsNotInMask(MO.getRegMask()); LivePhysRegs |= ReservedRegs; } } |