From 792deebfe42e6abf4fa79e6f34882a773d06bb13 Mon Sep 17 00:00:00 2001 From: Bill Schmidt Date: Fri, 8 Mar 2019 19:47:05 +0000 Subject: [PATCH] rs6000-p8swap.c (rs6000_analyze_swaps): Rebuild ud- and du-chains between phases. 2019-03-08 Bill Schmidt * config/rs6000/rs6000-p8swap.c (rs6000_analyze_swaps): Rebuild ud- and du-chains between phases. From-SVN: r269505 --- gcc/ChangeLog | 5 +++++ gcc/config/rs6000/rs6000-p8swap.c | 7 +++++++ 2 files changed, 12 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index fc347dc9cc2..15910aa49c4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2019-03-08 Bill Schmidt + + * config/rs6000/rs6000-p8swap.c (rs6000_analyze_swaps): Rebuild + ud- and du-chains between phases. + 2019-03-08 Richard Sandiford PR debug/89631 diff --git a/gcc/config/rs6000/rs6000-p8swap.c b/gcc/config/rs6000/rs6000-p8swap.c index bb9c16758d0..c3b98315503 100644 --- a/gcc/config/rs6000/rs6000-p8swap.c +++ b/gcc/config/rs6000/rs6000-p8swap.c @@ -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 ()); -- 2.30.2