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| author | Jakub Jelinek <jakub@redhat.com> | 2009-04-24 08:58:02 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2009-04-24 08:58:02 +0200 |
| commit | 6216f94e37db8de5a846c5945f4aa5f4e32aaedf (patch) | |
| tree | b915c002276568ad8d30cd5e3340544d674fc103 /gcc/testsuite | |
| parent | 6de7a512f0e76268d8ff69e51be80527c58d854b (diff) | |
| download | gcc-6216f94e37db8de5a846c5945f4aa5f4e32aaedf.zip gcc-6216f94e37db8de5a846c5945f4aa5f4e32aaedf.tar.gz gcc-6216f94e37db8de5a846c5945f4aa5f4e32aaedf.tar.bz2 | |
re PR rtl-optimization/39794 (Miscompile with -O2 -funroll-loops)
PR rtl-optimization/39794
* alias.c (canon_true_dependence): Add x_addr argument.
* rtl.h (canon_true_dependence): Adjust prototype.
* cse.c (check_dependence): Adjust canon_true_dependence callers.
* cselib.c (cselib_invalidate_mem): Likewise.
* gcse.c (compute_transp): Likewise.
* dse.c (scan_reads_nospill): Likewise.
(record_store, check_mem_read_rtx): Likewise. For non-const-or-frame
addresses pass base->val_rtx as mem_addr, for const-or-frame addresses
canon_base_addr of the group, plus optional offset.
(struct group_info): Rename canon_base_mem to
canon_base_addr.
(get_group_info): Set canon_base_addr to canon_rtx of base, not
canon_rtx of base_mem.
* gcc.dg/pr39794.c: New test.
From-SVN: r146669
Diffstat (limited to 'gcc/testsuite')
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr39794.c | 33 |
2 files changed, 38 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 47f4a80..bb5ffce 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2009-04-24 Jakub Jelinek <jakub@redhat.com> + + PR rtl-optimization/39794 + * gcc.dg/pr39794.c: New test. + 2009-04-23 Eric Botcazou <ebotcazou@adacore.com> * gnat.dg/atomic1.adb: New test. diff --git a/gcc/testsuite/gcc.dg/pr39794.c b/gcc/testsuite/gcc.dg/pr39794.c new file mode 100644 index 0000000..2702ba7 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr39794.c @@ -0,0 +1,33 @@ +/* PR rtl-optimization/39794 */ +/* { dg-do run } */ +/* { dg-options "-O2 -funroll-loops" } */ + +extern void abort (); + +void +foo (int *a, int n) +{ + int i; + for (i = 0; i < n; i++) + { + a[i] *= 2; + a[i + 1] = a[i - 1] + a[i - 2]; + } +} + +int a[16]; +int ref[16] = { 0, 1, 4, 2, 10, 12, 24, 44, + 72, 136, 232, 416, 736, 1296, 2304, 2032 }; + +int +main () +{ + int i; + for (i = 0; i < 16; i++) + a[i] = i; + foo (a + 2, 16 - 3); + for (i = 0; i < 16; i++) + if (ref[i] != a[i]) + abort (); + return 0; +} |