diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2020-07-26 19:36:28 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2020-07-26 19:36:28 +0000 |
| commit | cfca06d7963fa0909f90483b42a6d7d194d01e08 (patch) | |
| tree | 209fb2a2d68f8f277793fc8df46c753d31bc853b /llvm/lib/Target/AArch64/AArch64CondBrTuning.cpp | |
| parent | 706b4fc47bbc608932d3b491ae19a3b9cde9497b (diff) | |
Notes
Diffstat (limited to 'llvm/lib/Target/AArch64/AArch64CondBrTuning.cpp')
| -rw-r--r-- | llvm/lib/Target/AArch64/AArch64CondBrTuning.cpp | 16 |
1 files changed, 4 insertions, 12 deletions
diff --git a/llvm/lib/Target/AArch64/AArch64CondBrTuning.cpp b/llvm/lib/Target/AArch64/AArch64CondBrTuning.cpp index 25e23e4623de1..e90e8e3da0576 100644 --- a/llvm/lib/Target/AArch64/AArch64CondBrTuning.cpp +++ b/llvm/lib/Target/AArch64/AArch64CondBrTuning.cpp @@ -194,12 +194,8 @@ bool AArch64CondBrTuning::tryToTuneBranch(MachineInstr &MI, // There must not be any instruction between DefMI and MI that clobbers or // reads NZCV. - MachineBasicBlock::iterator I(DefMI), E(MI); - for (I = std::next(I); I != E; ++I) { - if (I->modifiesRegister(AArch64::NZCV, TRI) || - I->readsRegister(AArch64::NZCV, TRI)) - return false; - } + if (isNZCVTouchedInInstructionRange(DefMI, MI, TRI)) + return false; LLVM_DEBUG(dbgs() << " Replacing instructions:\n "); LLVM_DEBUG(DefMI.print(dbgs())); LLVM_DEBUG(dbgs() << " "); @@ -253,12 +249,8 @@ bool AArch64CondBrTuning::tryToTuneBranch(MachineInstr &MI, return false; // There must not be any instruction between DefMI and MI that clobbers or // reads NZCV. - MachineBasicBlock::iterator I(DefMI), E(MI); - for (I = std::next(I); I != E; ++I) { - if (I->modifiesRegister(AArch64::NZCV, TRI) || - I->readsRegister(AArch64::NZCV, TRI)) - return false; - } + if (isNZCVTouchedInInstructionRange(DefMI, MI, TRI)) + return false; LLVM_DEBUG(dbgs() << " Replacing instructions:\n "); LLVM_DEBUG(DefMI.print(dbgs())); LLVM_DEBUG(dbgs() << " "); |