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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-08-11 20:42:59 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-08-11 20:42:59 +0000 |
| commit | 5fa2d458af8522a0fc3c6c93227d8cb3c0dc2862 (patch) | |
| tree | aa4d820ef2ffd29a70aa594e33410d9062f293b8 | |
| parent | cfc0ad6e48fcbb5d9d7d97307e5b5df6bba53a97 (diff) | |
| download | external_llvm-5fa2d458af8522a0fc3c6c93227d8cb3c0dc2862.zip external_llvm-5fa2d458af8522a0fc3c6c93227d8cb3c0dc2862.tar.gz external_llvm-5fa2d458af8522a0fc3c6c93227d8cb3c0dc2862.tar.bz2 | |
MachineCSE: Hoist isConstantPhysReg out of the loop, it checks for overlaps already.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@161729 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/MachineCSE.cpp | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/lib/CodeGen/MachineCSE.cpp b/lib/CodeGen/MachineCSE.cpp index 993975e..896461f 100644 --- a/lib/CodeGen/MachineCSE.cpp +++ b/lib/CodeGen/MachineCSE.cpp @@ -215,11 +215,10 @@ bool MachineCSE::hasLivePhysRegDefUses(const MachineInstr *MI, if (MO.isDef() && (MO.isDead() || isPhysDefTriviallyDead(Reg, I, MBB->end()))) continue; - for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) { - // Reading constant physregs is ok. - if (!MRI->isConstantPhysReg(*AI, *MBB->getParent())) + // Reading constant physregs is ok. + if (!MRI->isConstantPhysReg(Reg, *MBB->getParent())) + for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) PhysRefs.insert(*AI); - } if (MO.isDef()) PhysDefs.push_back(Reg); } |