diff options
Diffstat (limited to 'llvm/lib/CodeGen/RegAllocFast.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/RegAllocFast.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/RegAllocFast.cpp b/llvm/lib/CodeGen/RegAllocFast.cpp index 0f44f6d..3627bbb 100644 --- a/llvm/lib/CodeGen/RegAllocFast.cpp +++ b/llvm/lib/CodeGen/RegAllocFast.cpp @@ -982,6 +982,7 @@ void RegAllocFastImpl::allocVirtRegUndef(MachineOperand &MO) { if (!shouldAllocateRegister(VirtReg)) return; + MO.setIsRenamable(); LiveRegMap::iterator LRI = findLiveVirtReg(VirtReg); MCPhysReg PhysReg; if (LRI != LiveVirtRegs.end() && LRI->PhysReg) { @@ -997,6 +998,7 @@ void RegAllocFastImpl::allocVirtRegUndef(MachineOperand &MO) { // basic. PhysReg = getErrorAssignment(*LRI, *MO.getParent(), RC); LRI->Error = true; + MO.setIsRenamable(false); } else PhysReg = AllocationOrder.front(); } @@ -1007,7 +1009,6 @@ void RegAllocFastImpl::allocVirtRegUndef(MachineOperand &MO) { MO.setSubReg(0); } MO.setReg(PhysReg); - MO.setIsRenamable(!LRI->Error); } /// Variation of defineVirtReg() with special handling for livethrough regs |