diff options
| -rw-r--r-- | include/llvm/CodeGen/MachineRegisterInfo.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/include/llvm/CodeGen/MachineRegisterInfo.h b/include/llvm/CodeGen/MachineRegisterInfo.h index 81eb69414a..8af42b7cf5 100644 --- a/include/llvm/CodeGen/MachineRegisterInfo.h +++ b/include/llvm/CodeGen/MachineRegisterInfo.h @@ -108,10 +108,10 @@ public: unsigned createVirtualRegister(const TargetRegisterClass *RegClass) { assert(RegClass && "Cannot create register without RegClass!"); // Add a reg, but keep track of whether the vector reallocated or not. - void *ArrayBase = &VRegInfo[0]; + void *ArrayBase = VRegInfo.empty() ? 0 : &VRegInfo[0]; VRegInfo.push_back(std::make_pair(RegClass, (MachineOperand*)0)); - if (&VRegInfo[0] == ArrayBase) + if (&VRegInfo[0] == ArrayBase || VRegInfo.size() == 1) return getLastVirtReg(); // Otherwise, the vector reallocated, handle this now. |