search for: usephysreg

...ystem.B.dylib 0x00007fff8056935a _sigtramp + 26 3 libSystem.B.dylib 000000000000000000 _sigtramp + 2141809856 4 clang 0x00000001012dd96d llvm::llvm_unreachable_internal(char const*, char const*, unsigned int) + 381 5 clang 0x0000000100ee6b70 (anonymous namespace)::RAFast::usePhysReg(llvm::MachineOperand&) + 208 6 clang 0x0000000100eebb62 (anonymous namespace)::RAFast::AllocateBasicBlock() + 2290 7 clang 0x0000000100eedf20 (anonymous namespace)::RAFast::runOnMachineFunction(llvm::MachineFunction&) + 480 8 clang 0x0000000100e9677e l...

Hi all, I am using the fast register allocator on a partially allocated machine function. I have noticed reserved registers (i.e. liveins) are marked as free after first use (in usePhysReg(..) method). This seems an error to me as a livein might be still used later in the basic block. As I understand this should check for isKill() before marking it as free, but I see it even *sets* the kill state on that operand. I feel this might be because FastRegAlloc is prepared to work on MI co...