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rs6000-p8swap.c (rs6000_analyze_swaps): Rebuild ud- and du-chains between phases.

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2019-03-08  Bill Schmidt  <wschmidt@linux.ibm.com>

	* config/rs6000/rs6000-p8swap.c (rs6000_analyze_swaps): Rebuild
	ud- and du-chains between phases.

From-SVN: r269505
This commit is contained in:
Bill Schmidt 2019-03-08 19:47:05 +00:00 • committed by William Schmidt
parent 6fbaad2154
commit 792deebfe4
2 changed files with 12 additions and 0 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2019-03-08 Bill Schmidt <wschmidt@linux.ibm.com>
* config/rs6000/rs6000-p8swap.c (rs6000_analyze_swaps): Rebuild
ud- and du-chains between phases.
2019-03-08 Richard Sandiford <richard.sandiford@arm.com>
PR debug/89631

7
gcc/config/rs6000/rs6000-p8swap.c
View file

@ -2316,7 +2316,14 @@ rs6000_analyze_swaps (function *fun)
/* Pre-pass to recombine lvx and stvx patterns so we don't lose info. */
recombine_lvx_stvx_patterns (fun);
/* Rebuild ud- and du-chains. */
df_remove_problem (df_chain);
df_process_deferred_rescans ();
df_set_flags (DF_RD_PRUNE_DEAD_DEFS);
df_chain_add_problem (DF_DU_CHAIN | DF_UD_CHAIN);
df_analyze ();
df_set_flags (DF_DEFER_INSN_RESCAN);
/* Allocate structure to represent webs of insns. */
insn_entry = XCNEWVEC (swap_web_entry, get_max_uid ());