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| author | Jakub Jelinek <jakub@redhat.com> | 2018-06-20 16:47:28 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2018-06-20 16:47:28 +0200 |
| commit | c81a5aecc58eb17bc951d0306945c029439b5fcb (patch) | |
| tree | ddb724171370d77ae98b9b99ae5b78b6e46b7346 /gcc | |
| parent | 60f02f902170249d3a7fe763c10c1aa9375b1150 (diff) | |
| download | gcc-c81a5aecc58eb17bc951d0306945c029439b5fcb.zip gcc-c81a5aecc58eb17bc951d0306945c029439b5fcb.tar.gz gcc-c81a5aecc58eb17bc951d0306945c029439b5fcb.tar.bz2 | |
re PR tree-optimization/86231 (vrp_meet causes wrong-code)
PR tree-optimization/86231
* tree-vrp.c (union_ranges): For ( [ ) ] or ( )[ ] range and
anti-range don't overwrite *vr0min before using it to compute *vr0max.
* gcc.dg/tree-ssa/vrp119.c: New test.
* gcc.c-torture/execute/pr86231.c: New test.
From-SVN: r261805
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/execute/pr86231.c | 30 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/vrp119.c | 20 | ||||
| -rw-r--r-- | gcc/tree-vrp.c | 2 |
5 files changed, 63 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index d43118c..5d267eb 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2018-06-20 Jakub Jelinek <jakub@redhat.com> + + PR tree-optimization/86231 + * tree-vrp.c (union_ranges): For ( [ ) ] or ( )[ ] range and + anti-range don't overwrite *vr0min before using it to compute *vr0max. + 2018-06-20 Tom de Vries <tdevries@suse.de> PR tree-optimization/86097 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index ad3b600..5b3de8d 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,9 @@ +2018-06-20 Jakub Jelinek <jakub@redhat.com> + + PR tree-optimization/86231 + * gcc.dg/tree-ssa/vrp119.c: New test. + * gcc.c-torture/execute/pr86231.c: New test. + 2018-06-20 Tom de Vries <tdevries@suse.de> PR tree-optimization/86097 diff --git a/gcc/testsuite/gcc.c-torture/execute/pr86231.c b/gcc/testsuite/gcc.c-torture/execute/pr86231.c new file mode 100644 index 0000000..79232eb --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/execute/pr86231.c @@ -0,0 +1,30 @@ +/* PR tree-optimization/86231 */ + +#define ONE ((void *) 1) +#define TWO ((void *) 2) + +__attribute__((noipa)) int +foo (void *p, int x) +{ + if (p == ONE) return 0; + if (!p) + p = x ? TWO : ONE; + return p == ONE ? 0 : 1; +} + +int v[8]; + +int +main () +{ + if (foo ((void *) 0, 0) != 0 + || foo ((void *) 0, 1) != 1 + || foo (ONE, 0) != 0 + || foo (ONE, 1) != 0 + || foo (TWO, 0) != 1 + || foo (TWO, 1) != 1 + || foo (&v[7], 0) != 1 + || foo (&v[7], 1) != 1) + __builtin_abort (); + return 0; +} diff --git a/gcc/testsuite/gcc.dg/tree-ssa/vrp119.c b/gcc/testsuite/gcc.dg/tree-ssa/vrp119.c new file mode 100644 index 0000000..92c490e --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/vrp119.c @@ -0,0 +1,20 @@ +/* PR tree-optimization/86231 */ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-vrp1" } */ +/* { dg-final { scan-tree-dump-not "link_error" "vrp1" } } */ + +int bar (int); +void link_error (void); + +int +foo (int x, int y, int z) +{ + if (x < 4 || x > 8) __builtin_unreachable (); + if (y >= 2 && y <= 6) __builtin_unreachable (); + /* x is [4, 8], y is ~[2, 6], resulting range of e should be ~[2, 3]. */ + int e = (z ? x : y); + bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (bar (e)))))))))))); + if (e == 2 || e == 3) + link_error (); + return e; +} diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c index fad25ed..7c67539 100644 --- a/gcc/tree-vrp.c +++ b/gcc/tree-vrp.c @@ -5922,9 +5922,9 @@ union_ranges (enum value_range_type *vr0type, if (TREE_CODE (*vr0min) == INTEGER_CST) { *vr0type = vr1type; - *vr0min = vr1min; *vr0max = int_const_binop (MINUS_EXPR, *vr0min, build_int_cst (TREE_TYPE (*vr0min), 1)); + *vr0min = vr1min; } else goto give_up; |