Running the following command,
llc -asm-verbose=false -O3 Output/ReedSolomon.llvm.bc -o Output/ReedSolomon.llc.s -verify-machineinstrs
in llvm-test/SingleSource/Benchmarks/Misc currently yields seven errors, all of the form
*** Bad machine code: PHI operand is not live-out from predecessor ***
- function: main
- basic block: bb2.i.preheader 0x1ba7680 (BB#5)
- instruction: %reg1032 = PHI %reg1280, <BB#3>, %reg1287, <BB#4>
- operand 1: %reg1280
The code seems to run ok though.
Is this something that’s worth looking in to, or just over zealous reporting by the machine verifier?