diff options
Diffstat (limited to 'contrib/llvm/lib/CodeGen/ExecutionDepsFix.cpp')
| -rw-r--r-- | contrib/llvm/lib/CodeGen/ExecutionDepsFix.cpp | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/contrib/llvm/lib/CodeGen/ExecutionDepsFix.cpp b/contrib/llvm/lib/CodeGen/ExecutionDepsFix.cpp index 5b09cf1..201f9c1 100644 --- a/contrib/llvm/lib/CodeGen/ExecutionDepsFix.cpp +++ b/contrib/llvm/lib/CodeGen/ExecutionDepsFix.cpp @@ -733,12 +733,14 @@ bool ExeDepsFix::runOnMachineFunction(MachineFunction &mf) { // If no relevant registers are used in the function, we can skip it // completely. bool anyregs = false; + const MachineRegisterInfo &MRI = mf.getRegInfo(); for (TargetRegisterClass::const_iterator I = RC->begin(), E = RC->end(); - I != E; ++I) - if (MF->getRegInfo().isPhysRegUsed(*I)) { - anyregs = true; - break; - } + I != E && !anyregs; ++I) + for (MCRegAliasIterator AI(*I, TRI, true); AI.isValid(); ++AI) + if (!MRI.reg_nodbg_empty(*AI)) { + anyregs = true; + break; + } if (!anyregs) return false; // Initialize the AliasMap on the first use. |
