From 93e6f02759a9d98c0c0621540382074219aa374a Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Fri, 29 Jul 2011 23:02:48 +0000 Subject: [PATCH] Check for multiple defs in the machine code verifier. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136535 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/MachineVerifier.cpp | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/lib/CodeGen/MachineVerifier.cpp b/lib/CodeGen/MachineVerifier.cpp index 7a55852a131..8541d18ef3e 100644 --- a/lib/CodeGen/MachineVerifier.cpp +++ b/lib/CodeGen/MachineVerifier.cpp @@ -686,6 +686,11 @@ MachineVerifier::visitMachineOperand(const MachineOperand *MO, unsigned MONum) { else addRegWithSubRegs(regsDefined, Reg); + // Verify SSA form. + if (MRI->isSSA() && TargetRegisterInfo::isVirtualRegister(Reg) && + llvm::next(MRI->def_begin(Reg)) != MRI->def_end()) + report("Multiple virtual register defs in SSA form", MO, MONum); + // Check LiveInts for a live range, but only for virtual registers. if (LiveInts && TargetRegisterInfo::isVirtualRegister(Reg) && !LiveInts->isNotInMIMap(MI)) {