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| author | Jan Hubicka <hubicka@ucw.cz> | 2014-08-15 01:36:22 +0200 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 2014-08-14 23:36:22 +0000 |
| commit | 80b6ba28787d32f5ca63d9a643c110474ba79160 (patch) | |
| tree | f6a1bda569f302e135bad3e65c640895625724a3 | |
| parent | 56b1f114de93c27600b9b295ff7efcf9caedfc72 (diff) | |
| download | gcc-80b6ba28787d32f5ca63d9a643c110474ba79160.zip gcc-80b6ba28787d32f5ca63d9a643c110474ba79160.tar.gz gcc-80b6ba28787d32f5ca63d9a643c110474ba79160.tar.bz2 | |
re PR tree-optimization/62091 (ice in before_dom_children)
PR tree-optimization/62091
* g++.dg/ipa/devirt-38.C: New testcase.
* tree-ssa-alias.c (walk_aliased_vdefs_1): Do not clear
function_entry_reached.
(walk_aliased_vdefs): Clear it here.
* ipa-devirt.c (check_stmt_for_type_change): Handle static storage.
From-SVN: r213991
| -rw-r--r-- | gcc/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/ipa-devirt.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/g++.dg/ipa/devirt-38.C | 30 | ||||
| -rw-r--r-- | gcc/tree-ssa-alias.c | 5 |
5 files changed, 48 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 223e484..e5e0852 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,13 @@ 2014-08-14 Jan Hubicka <hubicka@ucw.cz> + PR tree-optimization/62091 + * tree-ssa-alias.c (walk_aliased_vdefs_1): Do not clear + function_entry_reached. + (walk_aliased_vdefs): Clear it here. + * ipa-devirt.c (check_stmt_for_type_change): Handle static storage. + +2014-08-14 Jan Hubicka <hubicka@ucw.cz> + * ipa-utils.h (compare_virtual_tables): Declare. * ipa-devirt.c (odr_subtypes_equivalent_p): New function diff --git a/gcc/ipa-devirt.c b/gcc/ipa-devirt.c index 2d356ad..ff206ee 100644 --- a/gcc/ipa-devirt.c +++ b/gcc/ipa-devirt.c @@ -2777,6 +2777,8 @@ check_stmt_for_type_change (ao_ref *ao ATTRIBUTE_UNUSED, tree vdef, void *data) * BITS_PER_UNIT; op = TREE_OPERAND (op, 0); } + else if (DECL_P (op)) + ; else { tci->speculative = true; diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index bc879c1..73a6ab8 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2014-08-14 Jan Hubicka <hubicka@ucw.cz> + + PR tree-optimization/62091 + * g++.dg/ipa/devirt-38.C: New testcase. + 2014-08-14 Marek Polacek <polacek@redhat.com> DR 458 diff --git a/gcc/testsuite/g++.dg/ipa/devirt-38.C b/gcc/testsuite/g++.dg/ipa/devirt-38.C new file mode 100644 index 0000000..be8cbdf --- /dev/null +++ b/gcc/testsuite/g++.dg/ipa/devirt-38.C @@ -0,0 +1,30 @@ +/* { dg-do compile } */ +/* { dg-options "-O2" } */ +class SnmpSyntax +{ +public: + virtual SnmpSyntax *m_fn1 () const; + ~SnmpSyntax () {} + virtual SnmpSyntax &operator=(const SnmpSyntax &); +}; + +class A : public SnmpSyntax +{ +public: + A (int); + SnmpSyntax *m_fn1 () const {} + SnmpSyntax &operator=(const SnmpSyntax &); +}; +int a; +void fn1 () +{ + for (;; a++) + switch (0) + case 0: + { + A b (0); + SnmpSyntax &c = b; + c.m_fn1 (); + } +} +// Devirtualization to A::m_fn1 would be possible, but we can not do it at the moment diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index 2910374..67419a9 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -2658,8 +2658,6 @@ walk_aliased_vdefs_1 (ao_ref *ref, tree vdef, bitmap *visited, unsigned int cnt, bool *function_entry_reached) { - if (function_entry_reached) - *function_entry_reached = false; do { gimple def_stmt = SSA_NAME_DEF_STMT (vdef); @@ -2709,6 +2707,9 @@ walk_aliased_vdefs (ao_ref *ref, tree vdef, timevar_push (TV_ALIAS_STMT_WALK); + if (function_entry_reached) + *function_entry_reached = false; + ret = walk_aliased_vdefs_1 (ref, vdef, walker, data, visited ? visited : &local_visited, 0, function_entry_reached); |