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| author | Steven Bosscher <steven@gcc.gnu.org> | 2007-02-11 19:53:11 +0000 |
|---|---|---|
| committer | Steven Bosscher <steven@gcc.gnu.org> | 2007-02-11 19:53:11 +0000 |
| commit | a31830a7cab48698868c117ba9100ec31069a91b (patch) | |
| tree | b8e43a1106916133f6889b90922be4c1b0c3b737 /gcc/local-alloc.c | |
| parent | 4c38b6d9425a007d8e27511703f9660c48962e6e (diff) | |
| download | gcc-a31830a7cab48698868c117ba9100ec31069a91b.zip gcc-a31830a7cab48698868c117ba9100ec31069a91b.tar.gz gcc-a31830a7cab48698868c117ba9100ec31069a91b.tar.bz2 | |
fwprop.c (try_fwprop_subst): Use set_unique_reg_note to add the REG_EQ* note.
* fwprop.c (try_fwprop_subst): Use set_unique_reg_note
to add the REG_EQ* note.
* see.c (see_merge_one_use_extension): Likewise.
* local-alloc.c (update_equiv_regs): Likewise. Also don't
turn REG_EQUAL notes into REG_EQUIV notes if the target
register may have more than one set.
* function.c (assign_parm_setup_reg): Use set_unique_reg_note.
* gcse.c (try_replace_reg): Likewise.
* alias.c (init_alias_analysis): Use find_reg_equal_equiv_note.
* calls.c (fixup_tail_calls): Likewise. Abort if there is
more than one REG_EQUIV note.
* reload1.c (gen_reload): Use set_unique_reg_note.
From-SVN: r121821
Diffstat (limited to 'gcc/local-alloc.c')
| -rw-r--r-- | gcc/local-alloc.c | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/gcc/local-alloc.c b/gcc/local-alloc.c index e6ff69e..6f24968 100644 --- a/gcc/local-alloc.c +++ b/gcc/local-alloc.c @@ -930,8 +930,13 @@ update_equiv_regs (void) /* If this register is known to be equal to a constant, record that it is always equivalent to the constant. */ - if (note && ! rtx_varies_p (XEXP (note, 0), 0)) - PUT_MODE (note, (enum machine_mode) REG_EQUIV); + if (REG_N_SETS (regno) == 1 + && note && ! rtx_varies_p (XEXP (note, 0), 0)) + { + rtx note_value = XEXP (note, 0); + remove_note (insn, note); + set_unique_reg_note (insn, REG_EQUIV, note_value); + } /* If this insn introduces a "constant" register, decrease the priority of that register. Record this insn if the register is only used once @@ -953,9 +958,7 @@ update_equiv_regs (void) if (note == 0 && REG_BASIC_BLOCK (regno) >= 0 && MEM_P (SET_SRC (set)) && validate_equiv_mem (insn, dest, SET_SRC (set))) - REG_NOTES (insn) = note = gen_rtx_EXPR_LIST (REG_EQUIV, - copy_rtx (SET_SRC (set)), - REG_NOTES (insn)); + note = set_unique_reg_note (insn, REG_EQUIV, copy_rtx (SET_SRC (set))); if (note) { @@ -1061,9 +1064,8 @@ update_equiv_regs (void) if (validate_equiv_mem (init_insn, src, dest) && ! memref_used_between_p (dest, init_insn, insn)) { - REG_NOTES (init_insn) - = gen_rtx_EXPR_LIST (REG_EQUIV, copy_rtx (dest), - REG_NOTES (init_insn)); + set_unique_reg_note (init_insn, REG_EQUIV, copy_rtx (dest)); + /* This insn makes the equivalence, not the one initializing the register. */ reg_equiv_init[regno] |