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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-07-29 23:02:48 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-07-29 23:02:48 +0000 |
| commit | 93e6f02759a9d98c0c0621540382074219aa374a (patch) | |
| tree | 145977c89d5939ed3a742c7bcdfcfa3d32b3e3a8 /lib/CodeGen/MachineVerifier.cpp | |
| parent | eb809f562e13603459182a5d1c7b0d0704770e6f (diff) | |
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
Diffstat (limited to 'lib/CodeGen/MachineVerifier.cpp')
| -rw-r--r-- | lib/CodeGen/MachineVerifier.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineVerifier.cpp b/lib/CodeGen/MachineVerifier.cpp index 7a55852a13..8541d18ef3 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)) { |