diff options
Diffstat (limited to 'gcc-4.9/gcc/optabs.c')
| -rw-r--r-- | gcc-4.9/gcc/optabs.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/gcc-4.9/gcc/optabs.c b/gcc-4.9/gcc/optabs.c index cd31b0e63..39e8cd4f6 100644 --- a/gcc-4.9/gcc/optabs.c +++ b/gcc-4.9/gcc/optabs.c @@ -7337,7 +7337,10 @@ expand_atomic_test_and_set (rtx target, rtx mem, enum memmodel model) perform the operation. */ if (!ret) { - emit_move_insn (subtarget, mem); + /* If the result is ignored skip the move to target. */ + if (subtarget != const0_rtx) + emit_move_insn (subtarget, mem); + emit_move_insn (mem, trueval); ret = subtarget; } |