diff options
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 3609b94..24dcefa 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -13901,7 +13901,6 @@ distribute_notes (rtx notes, rtx_insn *from_insn, rtx_insn *i3, rtx_insn *i2, tem_insn = from_insn; else { - tem_insn = i3; if (from_insn && CALL_P (from_insn) && find_reg_fusage (from_insn, USE, XEXP (note, 0))) @@ -13910,14 +13909,7 @@ distribute_notes (rtx notes, rtx_insn *from_insn, rtx_insn *i3, rtx_insn *i2, place = i3; else if (i2 != 0 && next_nonnote_nondebug_insn (i2) == i3 && reg_referenced_p (XEXP (note, 0), PATTERN (i2))) - { - place = i2; - /* If the new I2 sets the same register that is marked dead - in the note, the note now should not be put on I2, as the - note refers to a previous incarnation of the reg. */ - if (reg_set_p (XEXP (note, 0), PATTERN (i2))) - tem_insn = i2; - } + place = i2; else if ((rtx_equal_p (XEXP (note, 0), elim_i2) && !(i2mod && reg_overlap_mentioned_p (XEXP (note, 0), @@ -13925,6 +13917,12 @@ distribute_notes (rtx notes, rtx_insn *from_insn, rtx_insn *i3, rtx_insn *i2, || rtx_equal_p (XEXP (note, 0), elim_i1) || rtx_equal_p (XEXP (note, 0), elim_i0)) break; + tem_insn = i3; + /* If the new I2 sets the same register that is marked dead + in the note, we do not know where to put the note. + Give up. */ + if (i2 != 0 && reg_set_p (XEXP (note, 0), PATTERN (i2))) + break; } if (place == 0) |