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| author | Pete Cooper <peter_cooper@apple.com> | 2012-07-19 23:40:38 +0000 |
|---|---|---|
| committer | Pete Cooper <peter_cooper@apple.com> | 2012-07-19 23:40:38 +0000 |
| commit | b97c57a8b7dc268958924b8bcc0e97f70437dff6 (patch) | |
| tree | b735ac1d198f48aa78512eb3daaca74949503edb /lib/CodeGen/MachineVerifier.cpp | |
| parent | 39e357fafe074babbd9661f3e78239f5ebe7c429 (diff) | |
| download | external_llvm-b97c57a8b7dc268958924b8bcc0e97f70437dff6.zip external_llvm-b97c57a8b7dc268958924b8bcc0e97f70437dff6.tar.gz external_llvm-b97c57a8b7dc268958924b8bcc0e97f70437dff6.tar.bz2 | |
Fix crash in machine verifier when trying to print the def of a register which has no def
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160531 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineVerifier.cpp')
| -rw-r--r-- | lib/CodeGen/MachineVerifier.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineVerifier.cpp b/lib/CodeGen/MachineVerifier.cpp index fca051e..d8dece6 100644 --- a/lib/CodeGen/MachineVerifier.cpp +++ b/lib/CodeGen/MachineVerifier.cpp @@ -837,6 +837,8 @@ void MachineVerifier::checkLiveness(const MachineOperand *MO, unsigned MONum) { // Reserved registers may be used even when 'dead'. if (!isReserved(Reg)) report("Using an undefined physical register", MO, MONum); + } else if (MRI->def_empty(Reg)) { + report("Reading virtual register without a def", MO, MONum); } else { BBInfo &MInfo = MBBInfoMap[MI->getParent()]; // We don't know which virtual registers are live in, so only complain |