diff options
Diffstat (limited to 'lib/CodeGen/LiveVariables.cpp')
| -rw-r--r-- | lib/CodeGen/LiveVariables.cpp | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp index 5c7818d330..46a8012ae3 100644 --- a/lib/CodeGen/LiveVariables.cpp +++ b/lib/CodeGen/LiveVariables.cpp @@ -239,9 +239,11 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) { NumOperandsToProcess = 1; // Loop over implicit uses, using them. - for (const unsigned *ImplicitUses = MID.ImplicitUses; - *ImplicitUses; ++ImplicitUses) - HandlePhysRegUse(*ImplicitUses, MI); + if (MID.ImplicitUses) { + for (const unsigned *ImplicitUses = MID.ImplicitUses; + *ImplicitUses; ++ImplicitUses) + HandlePhysRegUse(*ImplicitUses, MI); + } // Process all explicit uses... for (unsigned i = 0; i != NumOperandsToProcess; ++i) { @@ -257,9 +259,11 @@ bool LiveVariables::runOnMachineFunction(MachineFunction &MF) { } // Loop over implicit defs, defining them. - for (const unsigned *ImplicitDefs = MID.ImplicitDefs; - *ImplicitDefs; ++ImplicitDefs) - HandlePhysRegDef(*ImplicitDefs, MI); + if (MID.ImplicitDefs) { + for (const unsigned *ImplicitDefs = MID.ImplicitDefs; + *ImplicitDefs; ++ImplicitDefs) + HandlePhysRegDef(*ImplicitDefs, MI); + } // Process all explicit defs... for (unsigned i = 0; i != NumOperandsToProcess; ++i) { |