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| author | Richard Guenther <rguenther@suse.de> | 2010-10-22 19:03:39 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2010-10-22 19:03:39 +0000 |
| commit | 07db7d35a9b27002021a96fc0ac4175d102d56d3 (patch) | |
| tree | aba9c0452722f367214fd539f57871adfd8cbd2c | |
| parent | d8c801fdbe83d2529221e7beb0e75eebca3e86f9 (diff) | |
| download | gcc-07db7d35a9b27002021a96fc0ac4175d102d56d3.zip gcc-07db7d35a9b27002021a96fc0ac4175d102d56d3.tar.gz gcc-07db7d35a9b27002021a96fc0ac4175d102d56d3.tar.bz2 | |
re PR tree-optimization/46137 (g++.dg/torture/pr45877.C FAILs with -fno-tree-dce)
2010-10-22 Richard Guenther <rguenther@suse.de>
PR middle-end/46137
* gimple-fold.c (gimplify_and_update_call_from_tree): Properly
remove the virtual operands if they are not needed.
* c-c++-common/torture/pr46137.c: New testcase.
From-SVN: r165852
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/gimple-fold.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/c-c++-common/torture/pr46137.c | 18 |
4 files changed, 31 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 5731ffe..3f6e01b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2010-10-22 Richard Guenther <rguenther@suse.de> + + PR middle-end/46137 + * gimple-fold.c (gimplify_and_update_call_from_tree): Properly + remove the virtual operands if they are not needed. + 2010-10-22 Changpeng Fang <changpeng.fang@amd.com> * gcc/config/i386/i386.c (processor_costs bdver1_cost): Update diff --git a/gcc/gimple-fold.c b/gcc/gimple-fold.c index 697e364..6862c126 100644 --- a/gcc/gimple-fold.c +++ b/gcc/gimple-fold.c @@ -1044,6 +1044,8 @@ gimplify_and_update_call_from_tree (gimple_stmt_iterator *si_p, tree expr) if (TREE_CODE (gimple_vdef (stmt)) == SSA_NAME) SSA_NAME_DEF_STMT (gimple_vdef (stmt)) = new_stmt; } + else if (reaching_vuse == gimple_vuse (stmt)) + unlink_stmt_vdef (stmt); } gimple_set_location (new_stmt, gimple_location (stmt)); diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 5c254e1..1aa51a4 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2010-10-22 Richard Guenther <rguenther@suse.de> + + PR middle-end/46137 + * c-c++-common/torture/pr46137.c: New testcase. + 2010-10-22 Jason Merrill <jason@redhat.com> PR c++/46129 diff --git a/gcc/testsuite/c-c++-common/torture/pr46137.c b/gcc/testsuite/c-c++-common/torture/pr46137.c new file mode 100644 index 0000000..3e44ff6 --- /dev/null +++ b/gcc/testsuite/c-c++-common/torture/pr46137.c @@ -0,0 +1,18 @@ +/* { dg-do compile } */ + +struct X { }; + +static inline void * +bar (void *dst, void *src) +{ + return __builtin___memcpy_chk (dst, src, sizeof (struct X), + __builtin_object_size (dst, 0)); +} + +struct X +foo (struct X *x) +{ + struct X any; + bar (&any, x); + return any; +} |