diff options
Diffstat (limited to 'lib/CodeGen/RegAllocLocal.cpp')
| -rw-r--r-- | lib/CodeGen/RegAllocLocal.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/CodeGen/RegAllocLocal.cpp b/lib/CodeGen/RegAllocLocal.cpp index 2b249b2f82..8e7c1fe2a0 100644 --- a/lib/CodeGen/RegAllocLocal.cpp +++ b/lib/CodeGen/RegAllocLocal.cpp @@ -596,6 +596,8 @@ void RA::AllocateBasicBlock(MachineBasicBlock &MBB) { if (MO.isRegister() && MO.isDef() && MO.getReg() && MRegisterInfo::isPhysicalRegister(MO.getReg())) { unsigned Reg = MO.getReg(); + if (PhysRegsUsed[Reg] == -2) continue; // Something like ESP. + PhysRegsEverUsed[Reg] = true; spillPhysReg(MBB, MI, Reg, true); // Spill any existing value in the reg PhysRegsUsed[Reg] = 0; // It is free and reserved now |