On Tue, Mar 11, 2014 at 8:00 PM, David Malcolm wrote: > Investigation revealed the issue to be a CFG from the previous compile > being kept alive by this GC root in gcse.c: > static GTY(()) rtx test_insn; > > This wouldn't it itself be an issue, but one (or more) of the edges had:
But this is an issue! This is not supposed to be possible. test_insn is not in the insns chain and also not in a basic block, so it should never keep a CFG alive. Your patch papers over a bigger issue: How does test_insn end up preventing the CFG from being garbage-collected. Ciao! Steven
