------- Comment #34 from ian at airs dot com 2005-10-08 05:51 ------- I am able to recreate the problem with a hppa64-hp-hpux11 cross-compiler, in the sense that combine does lose the REG_DEAD note when compiling the gcc.c-torture/compile/920501-13.c test case with -O1. In the current compiler, the compilation succeeds. A REG_UNUSED note is added by the recompute_reg_usage pass, the unused register is allocated, and the allocated register is later eliminated during the combine_stack_adjustments pass. So it works but the overall effect is not ideal since we allocate an unneccessary register.
I'll see if we can avoid losing the REG_DEAD note in the combine pass. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13931
