From cd4317efcf334be10d9a98008a1445d6e12a7712 Mon Sep 17 00:00:00 2001 From: Jim Laskey Date: Fri, 21 Jul 2006 21:15:20 +0000 Subject: Eliminate data relocations by using NULL instead of global empty list. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@29250 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/RegAllocSimple.cpp | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) (limited to 'lib/CodeGen/RegAllocSimple.cpp') diff --git a/lib/CodeGen/RegAllocSimple.cpp b/lib/CodeGen/RegAllocSimple.cpp index 5d94f0af85..c6faead658 100644 --- a/lib/CodeGen/RegAllocSimple.cpp +++ b/lib/CodeGen/RegAllocSimple.cpp @@ -166,12 +166,16 @@ void RegAllocSimple::AllocateBasicBlock(MachineBasicBlock &MBB) { unsigned Opcode = MI->getOpcode(); const TargetInstrDescriptor &Desc = TM->getInstrInfo()->get(Opcode); const unsigned *Regs; - for (Regs = Desc.ImplicitUses; *Regs; ++Regs) - RegsUsed[*Regs] = true; + if (Desc.ImplicitUses) { + for (Regs = Desc.ImplicitUses; *Regs; ++Regs) + RegsUsed[*Regs] = true; + } - for (Regs = Desc.ImplicitDefs; *Regs; ++Regs) { - RegsUsed[*Regs] = true; - PhysRegsEverUsed[*Regs] = true; + if (Desc.ImplicitDefs) { + for (Regs = Desc.ImplicitDefs; *Regs; ++Regs) { + RegsUsed[*Regs] = true; + PhysRegsEverUsed[*Regs] = true; + } } // Loop over uses, move from memory into registers. -- cgit v1.2.3-70-g09d2