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| author | Richard Biener <rguenther@suse.de> | 2017-09-12 14:15:37 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2017-09-12 14:15:37 +0000 |
| commit | 29545149bf8ca8c89a9a7d32fe7fdb8e9294759c (patch) | |
| tree | de78c3ff6d003d92a966ab0d77d691cb438bed65 | |
| parent | d681026df10348e1fbede89055cbd395dc66cdd8 (diff) | |
| download | gcc-29545149bf8ca8c89a9a7d32fe7fdb8e9294759c.zip gcc-29545149bf8ca8c89a9a7d32fe7fdb8e9294759c.tar.gz gcc-29545149bf8ca8c89a9a7d32fe7fdb8e9294759c.tar.bz2 | |
re PR tree-optimization/82157 (ICE on valid code at -O2 and -O3: cannot update SSA form)
2017-09-12 Richard Biener <rguenther@suse.de>
PR tree-optimization/82157
* tree-ssa-pre.c (remove_dead_inserted_code): Do not remove
stmts with side-effects.
* gcc.dg/torture/pr82157.c: New testcase.
From-SVN: r252020
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr82157.c | 43 | ||||
| -rw-r--r-- | gcc/tree-ssa-pre.c | 2 |
4 files changed, 56 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 7bc95e8..62e8fae 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2017-09-12 Richard Biener <rguenther@suse.de> + + PR tree-optimization/82157 + * tree-ssa-pre.c (remove_dead_inserted_code): Do not remove + stmts with side-effects. + 2017-09-12 Richard Sandiford <richard.sandiford@linaro.org> Alan Hayward <alan.hayward@arm.com> David Sherwood <david.sherwood@arm.com> diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 5d81c58..5722639 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2017-09-12 Richard Biener <rguenther@suse.de> + + PR tree-optimization/82157 + * gcc.dg/torture/pr82157.c: New testcase. + 2017-09-12 Simon Atanasyan <simon.atanasyan@imgtec.com> * gcc.target/mips/near-far-1.c: Add check for 'short_call' diff --git a/gcc/testsuite/gcc.dg/torture/pr82157.c b/gcc/testsuite/gcc.dg/torture/pr82157.c new file mode 100644 index 0000000..036b484 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr82157.c @@ -0,0 +1,43 @@ +/* { dg-do compile } */ + +int a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t, u, v, w, x, y, z; + +int aa () +{ + w = f < 0 || e >> f; + while (z) + h = i && (r && p) | ((l = p) == c % d); + k = v + 1 < a; + t = -(j < 1) * q; + return u; +} + +int ab () +{ + for (j = 0; 1; j = 5) + if (!s) + return d; +} + +void ac () +{ + char ad = aa (); + ab (); + if (x) + { + for (m = 0; m < 3; m = a) + { + y = a && b; + if (g) + break; + } + n = j; + } + o = j & ad; +} + +int main () +{ + ac (); + return 0; +} diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c index 6f9fac5..364272d 100644 --- a/gcc/tree-ssa-pre.c +++ b/gcc/tree-ssa-pre.c @@ -4913,6 +4913,8 @@ remove_dead_inserted_code (void) continue; gimple *t = SSA_NAME_DEF_STMT (def); + if (gimple_has_side_effects (t)) + continue; /* Add uses to the worklist. */ ssa_op_iter iter; |