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On 04/22/2010 12:25 PM, Paolo Bonzini wrote: > Right. It was even more broken before > > 2009-11-08 Paolo Bonzini <bonzini@gnu.org> > > * df-problems.c: Fix documentation for forward simulation of LR. > (df_simulate_one_insn_forwards): Use df_simulate_find_defs. > (df_simulate_finalize_forwards): Remove. > * df.h (df_simulate_finalize_forwards): Remove. Looking at that patch, I can't make sense of your comment for df_simulate_initialize_forwards. Clearly the artificial defs at the top must be set, not cleared, in the set of live regs? The patch below seems to fix a lot of failures on i686-linux with my peephole2 patch also applied. Maybe we don't even need to do anything at all if the DF_LIVE_IN bitmap is correct? Bernd
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