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Check for multiple defs in the machine code verifier.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136535 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2011-07-29 23:02:48 +00:00
parent eb809f562e
commit 93e6f02759
1 changed files with 5 additions and 0 deletions

5
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)) {