diff options
Diffstat (limited to 'gcc/lower-subreg.c')
| -rw-r--r-- | gcc/lower-subreg.c | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/gcc/lower-subreg.c b/gcc/lower-subreg.c index fbb506c572e..908b10e4e06 100644 --- a/gcc/lower-subreg.c +++ b/gcc/lower-subreg.c @@ -501,7 +501,7 @@ resolve_subreg_use (rtx *px, void *data) that the note must be removed. */ if (!x) { - gcc_assert(!insn); + gcc_assert (!insn); return 1; } @@ -711,6 +711,23 @@ resolve_simple_move (rtx set, rtx insn) return insn; } + /* It's possible for the code to use a subreg of a decomposed + register while forming an address. We need to handle that before + passing the address to emit_move_insn. We pass NULL_RTX as the + insn parameter to resolve_subreg_use because we can not validate + the insn yet. */ + if (MEM_P (src) || MEM_P (dest)) + { + int acg; + + if (MEM_P (src)) + for_each_rtx (&XEXP (src, 0), resolve_subreg_use, NULL_RTX); + if (MEM_P (dest)) + for_each_rtx (&XEXP (dest, 0), resolve_subreg_use, NULL_RTX); + acg = apply_change_group (); + gcc_assert (acg); + } + /* If SRC is a register which we can't decompose, or has side effects, we need to move via a temporary register. */ |