diff options
| author | Michael Meissner <meissner@linux.ibm.com> | 2018-08-20 23:46:37 +0000 |
|---|---|---|
| committer | Michael Meissner <meissner@gcc.gnu.org> | 2018-08-20 23:46:37 +0000 |
| commit | a7e94dc09a4470fde623197382e8dea4553e2d6b (patch) | |
| tree | 7f70c04abface4896f049270e05a115098eb2556 | |
| parent | fe7a679e8c4ce1a50afad508e094377bab365ea4 (diff) | |
| download | gcc-a7e94dc09a4470fde623197382e8dea4553e2d6b.zip gcc-a7e94dc09a4470fde623197382e8dea4553e2d6b.tar.gz gcc-a7e94dc09a4470fde623197382e8dea4553e2d6b.tar.bz2 | |
re PR target/87033 (The compiler does not generate the LWAX instruction)
[gcc]
2018-08-20 Michael Meissner <meissner@linux.ibm.com>
PR target/87033
* config/rs6000/rs6000.md (extendsi<mode>2): Change constraints
from 'Y' to 'YZ' to enable the LWAX instruction to be generated
for indexed loads.
[gcc/testsuite]
2018-08-20 Michael Meissner <meissner@linux.ibm.com>
PR target/87033
* gcc.target/powerpc/pr87033.c: New test.
From-SVN: r263678
| -rw-r--r-- | gcc/ChangeLog | 7 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.md | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/powerpc/pr87033.c | 12 |
4 files changed, 25 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ca49dba..cb9f552 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,10 @@ +2018-08-20 Michael Meissner <meissner@linux.ibm.com> + + PR target/87033 + * config/rs6000/rs6000.md (extendsi<mode>2): Change constraints + from 'Y' to 'YZ' to enable the LWAX instruction to be generated + for indexed loads. + 2018-08-20 Nathan Sidwell <nathan@acm.org> Jeff Law <law@redhat.com> diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md index d34fcf0..49e2090 100644 --- a/gcc/config/rs6000/rs6000.md +++ b/gcc/config/rs6000/rs6000.md @@ -988,7 +988,7 @@ "=r, r, wl, wu, wj, wK, wH, wr") (sign_extend:EXTSI (match_operand:SI 1 "lwa_operand" - "Y, r, Z, Z, r, wK, wH, ?wIwH")))] + "YZ, r, Z, Z, r, wK, wH, ?wIwH")))] "" "@ lwa%U1%X1 %0,%1 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 3708a5c..af86156 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2018-08-20 Michael Meissner <meissner@linux.ibm.com> + + PR target/87033 + * gcc.target/powerpc/pr87033.c: New test. + 2018-08-20 Martin Sebor <msebor@redhat.com> PR tree-optimization/87034 diff --git a/gcc/testsuite/gcc.target/powerpc/pr87033.c b/gcc/testsuite/gcc.target/powerpc/pr87033.c new file mode 100644 index 0000000..9d62ce7 --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/pr87033.c @@ -0,0 +1,12 @@ +/* { dg-do compile { target { powerpc*-*-* && lp64 } } } */ +/* { dg-options "-O2" } */ + +/* Insure that a LWAX is generated instead of ADD + LWA. LP64 is needed + because the LWA and LWAX instructions are only available in 64-bit mode. */ +long func (int *p, unsigned long n) +{ + return p[n]; +} + +/* { dg-final { scan-assembler {\mlwax\M} } } */ +/* { dg-final { scan-assembler-not {\mlwa\M} } } */ |