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rtl-optimization/98863 - tame i386 specific RPAD pass

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This removes analyzing DF with expensive problems which we do not
use at all and which somehow cause 5GB of memory to leak.  Instead
just do a defered rescan of added insns.

2021-01-29  Richard Biener  <rguenther@suse.de>

	PR rtl-optimization/98863
	* config/i386/i386-features.c (remove_partial_avx_dependency):
	Do not perform DF analysis.
	(pass_data_remove_partial_avx_dependency): Remove
	TODO_df_finish.
This commit is contained in:
Richard Biener 2021-01-29 16:02:36 +01:00
parent ee4c4fe289
commit a7f52181a6
1 changed files with 7 additions and 10 deletions
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17
gcc/config/i386/i386-features.c
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@ -2272,6 +2272,9 @@ remove_partial_avx_dependency (void)
auto_vec<rtx_insn *> control_flow_insns;
/* We create invalid RTL initially so defer rescans. */
df_set_flags (DF_DEFER_INSN_RESCAN);
FOR_EACH_BB_FN (bb, cfun)
{
FOR_BB_INSNS (bb, insn)
@ -2292,14 +2295,7 @@ remove_partial_avx_dependency (void)
continue;
if (!v4sf_const0)
{
calculate_dominance_info (CDI_DOMINATORS);
df_set_flags (DF_DEFER_INSN_RESCAN);
df_chain_add_problem (DF_DU_CHAIN | DF_UD_CHAIN);
df_md_add_problem ();
df_analyze ();
v4sf_const0 = gen_reg_rtx (V4SFmode);
}
v4sf_const0 = gen_reg_rtx (V4SFmode);
/* Convert PARTIAL_XMM_UPDATE_TRUE insns, DF -> SF, SF -> DF,
SI -> SF, SI -> DF, DI -> SF, DI -> DF, to vec_dup and
@ -2360,6 +2356,7 @@ remove_partial_avx_dependency (void)
{
/* (Re-)discover loops so that bb->loop_father can be used in the
analysis below. */
calculate_dominance_info (CDI_DOMINATORS);
loop_optimizer_init (AVOID_CFG_MODIFICATIONS);
/* Generate a vxorps at entry of the nearest dominator for basic
@ -2391,7 +2388,6 @@ remove_partial_avx_dependency (void)
set_insn = emit_insn_after (set,
insn ? PREV_INSN (insn) : BB_END (bb));
df_insn_rescan (set_insn);
df_process_deferred_rescans ();
loop_optimizer_finalize ();
if (!control_flow_insns.is_empty ())
@ -2412,6 +2408,7 @@ remove_partial_avx_dependency (void)
}
}
df_process_deferred_rescans ();
bitmap_obstack_release (NULL);
BITMAP_FREE (convert_bbs);
@ -2441,7 +2438,7 @@ const pass_data pass_data_remove_partial_avx_dependency =
0, /* properties_provided */
0, /* properties_destroyed */
0, /* todo_flags_start */
TODO_df_finish, /* todo_flags_finish */
0, /* todo_flags_finish */
};
class pass_remove_partial_avx_dependency : public rtl_opt_pass