From 9da4652288c52297d6bbbd3d205c295f4814878e Mon Sep 17 00:00:00 2001 From: "J\"orn Rennecke" Date: Thu, 9 Jul 1998 10:18:53 +0000 Subject: [PATCH] reload1.c (emit_reload_insns): If an output reload copies only to a secondary reload register... * reload1.c (emit_reload_insns): If an output reload copies only to a secondary reload register, indicate that the secondary reload does the actual store. From-SVN: r21034 --- gcc/ChangeLog | 6 ++++++ gcc/reload1.c | 30 +++++++++++++++++++++++++++++- 2 files changed, 35 insertions(+), 1 deletion(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e359a9cb3d3..a373deb99f3 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +Thu Jul 9 18:12:49 1998 J"orn Rennecke + + * reload1.c (emit_reload_insns): If an output reload copies only + to a secondary reload register, indicate that the secondary reload + does the actual store. + Thu Jul 9 18:01:05 1998 J"orn Rennecke * reload.c (find_equiv_reg): If need_stable_sp is set, diff --git a/gcc/reload1.c b/gcc/reload1.c index b6c0d8d8509..b115a94adba 100644 --- a/gcc/reload1.c +++ b/gcc/reload1.c @@ -7085,7 +7085,35 @@ emit_reload_insns (insn) SET_HARD_REG_BIT (reg_reloaded_died, src); } if (reload_spill_index[j] >= 0) - new_spill_reg_store[reload_spill_index[j]] = p; + { + int s = reload_secondary_out_reload[j]; + rtx set = single_set (p); + /* If this reload copies only to the secondary reload + register, the secondary reload does the actual + store. */ + if (s >= 0 && set == NULL_RTX) + ; /* We can't tell what function the secondary reload + has and where the actual store to the pseudo is + made; leave new_spill_reg_store alone. */ + else if (s >= 0 + && SET_SRC (set) == reload_reg_rtx[j] + && SET_DEST (set) == reload_reg_rtx[s]) + { + /* Usually the next instruction will be the + secondary reload insn; if we can confirm + that it is, setting new_spill_reg_store to + that insn will allow an extra optimization. */ + rtx s_reg = reload_reg_rtx[s]; + rtx next = NEXT_INSN (p); + reload_out[s] = reload_out[j]; + set = single_set (next); + if (set && SET_SRC (set) == s_reg + && ! new_spill_reg_store[REGNO (s_reg)]) + new_spill_reg_store[REGNO (s_reg)] = next; + } + else + new_spill_reg_store[reload_spill_index[j]] = p; + } } } -- 2.30.2