diff options
| author | Ulrich Weigand <uweigand@de.ibm.com> | 2016-03-10 23:58:44 +0000 |
|---|---|---|
| committer | Ulrich Weigand <uweigand@gcc.gnu.org> | 2016-03-10 23:58:44 +0000 |
| commit | 8287dbce7bcb7c6b1a0aa45f05b8c94a25a7c723 (patch) | |
| tree | d9aa09cc218ec8431a7dacf1cbd0e7f9df0c44d3 /gcc | |
| parent | f6c1032d03cd45af05f427a3b33bc12e88c44c3a (diff) | |
| download | gcc-8287dbce7bcb7c6b1a0aa45f05b8c94a25a7c723.zip gcc-8287dbce7bcb7c6b1a0aa45f05b8c94a25a7c723.tar.gz gcc-8287dbce7bcb7c6b1a0aa45f05b8c94a25a7c723.tar.bz2 | |
re PR target/70168 (Wrong code generation in __sync_val_compare_and_swap on PowerPC)
PR target/70168
* config/rs6000/rs6000.c (rs6000_expand_atomic_compare_and_swap):
Handle overlapping retval and newval.
From-SVN: r234126
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.c | 3 |
2 files changed, 9 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d53c261..cc91e84 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-03-10 Ulrich Weigand <Ulrich.Weigand@de.ibm.com> + + PR target/70168 + * config/rs6000/rs6000.c (rs6000_expand_atomic_compare_and_swap): + Handle overlapping retval and newval. + 2016-03-10 Nick Clifton <nickc@redhat.com> PR target/7044 diff --git a/gcc/config/rs6000/rs6000.c b/gcc/config/rs6000/rs6000.c index 5b03f9e..fd4b7cc 100644 --- a/gcc/config/rs6000/rs6000.c +++ b/gcc/config/rs6000/rs6000.c @@ -22283,6 +22283,9 @@ rs6000_expand_atomic_compare_and_swap (rtx operands[]) if (mode != TImode && !reg_or_short_operand (oldval, mode)) oldval = copy_to_mode_reg (mode, oldval); + if (reg_overlap_mentioned_p (retval, newval)) + newval = copy_to_reg (newval); + mem = rs6000_pre_atomic_barrier (mem, mod_s); label1 = NULL_RTX; |