From aed967cc9ebeaa02220d0652954dcf71dce842f2 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Wed, 18 Dec 2002 01:11:14 +0000 Subject: [PATCH] Implicit defs/uses list may be empty. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5103 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/RegAllocSimple.cpp | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/lib/CodeGen/RegAllocSimple.cpp b/lib/CodeGen/RegAllocSimple.cpp index 34d4d57da05..ffb6e97b19d 100644 --- a/lib/CodeGen/RegAllocSimple.cpp +++ b/lib/CodeGen/RegAllocSimple.cpp @@ -92,13 +92,13 @@ namespace { void invalidatePhysRegs(const MachineInstr *MI) { unsigned Opcode = MI->getOpcode(); const MachineInstrDescriptor &Desc = TM.getInstrInfo().get(Opcode); - const unsigned *regs = Desc.ImplicitUses; - while (*regs) - RegsUsed.insert(*regs++); + if (const unsigned *regs = Desc.ImplicitUses) + while (*regs) + RegsUsed.insert(*regs++); - regs = Desc.ImplicitDefs; - while (*regs) - RegsUsed.insert(*regs++); + if (const unsigned *regs = Desc.ImplicitDefs) + while (*regs) + RegsUsed.insert(*regs++); } void cleanupAfterFunction() { -- 2.34.1