On 11/12/2012 01:04 AM, Steven Bosscher wrote:
> gcc/
> PR rtl-optimization/51447
> * df-scan.c (df_get_entry_block_def_set): Add global regs to the set.
> * df-problems.c (df_lr_local_compute): Make global regs always live.
> * dce.c (deletable_insn_p): Make insns setting a
Hello,
In this PR, a set to a global reg is removed by fast-dce and ud-dce.
Such sets should always be preserved.
The proposed fix is to make global regs always live. This is done in
the df-* parts of the patch from Jakub (the test case is also his).
In addition, ud-dce should consider sets of gl
