------- Comment #9 from wilson at specifix dot com 2005-10-11 06:20 ------- Or maybe I will look at it later tonight.
The problem seems to be that we have no code that will make a jump insn dependent on the previous jump insn when we are scheduling a region that contains multiple basic blocks. For a target with a single condition code register things will just work out OK, but for IA-64, with multiple predicate registers and conditional execution, we can end up with pairs of branches that aren't dependent on each other, which means that they can be scheduled across each other, which is bad. With a trivial hack to force a dependency for branches, I no longer get an ICE. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24232
