From 2bf0649e053d1589689d2e4cf32c7bf1e5e6ae12 Mon Sep 17 00:00:00 2001 From: Dan Gohman Date: Fri, 25 Sep 2009 22:26:13 +0000 Subject: Simplify a few more uses of reg_iterator. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82812 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/MachineRegisterInfo.cpp | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) (limited to 'lib/CodeGen/MachineRegisterInfo.cpp') diff --git a/lib/CodeGen/MachineRegisterInfo.cpp b/lib/CodeGen/MachineRegisterInfo.cpp index 544d83a33f..b31973e04f 100644 --- a/lib/CodeGen/MachineRegisterInfo.cpp +++ b/lib/CodeGen/MachineRegisterInfo.cpp @@ -110,11 +110,9 @@ void MachineRegisterInfo::replaceRegWith(unsigned FromReg, unsigned ToReg) { MachineInstr *MachineRegisterInfo::getVRegDef(unsigned Reg) const { assert(Reg-TargetRegisterInfo::FirstVirtualRegister < VRegInfo.size() && "Invalid vreg!"); - for (reg_iterator I = reg_begin(Reg), E = reg_end(); I != E; ++I) { - // Since we are in SSA form, we can stop at the first definition. - if (I.getOperand().isDef()) - return &*I; - } + // Since we are in SSA form, we can use the first definition. + if (!def_empty(Reg)) + return &*def_begin(Reg); return 0; } -- cgit v1.2.3-18-g5258