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| author | Richard Guenther <rguenther@suse.de> | 2009-09-06 16:48:41 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2009-09-06 16:48:41 +0000 |
| commit | 3c45b96b27d5be00740b13ad80ae6c6be9c96dbc (patch) | |
| tree | 3b69d2381f9a7b5a6631e297a5dc73a9055dc763 /gcc | |
| parent | f7d601a5bd4fddecedc87ac0a4a57921dac8da60 (diff) | |
| download | gcc-3c45b96b27d5be00740b13ad80ae6c6be9c96dbc.zip gcc-3c45b96b27d5be00740b13ad80ae6c6be9c96dbc.tar.gz gcc-3c45b96b27d5be00740b13ad80ae6c6be9c96dbc.tar.bz2 | |
re PR middle-end/41261 (ice with -O2 -fprofile-arcs when compiling Linux kernel)
2009-09-06 Richard Guenther <rguenther@suse.de>
PR middle-end/41261
* tree-ssa-alias.c (refs_may_alias_p_1): Bail out for function decls.
* gcc.dg/torture/pr41261.c: New testcase.
From-SVN: r151460
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr41261.c | 8 | ||||
| -rw-r--r-- | gcc/tree-ssa-alias.c | 6 |
4 files changed, 24 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 6edcba2..80be045 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2009-09-06 Richard Guenther <rguenther@suse.de> + + PR middle-end/41261 + * tree-ssa-alias.c (refs_may_alias_p_1): Bail out for function decls. + 2009-09-05 Richard Guenther <rguenther@suse.de> PR middle-end/41181 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 7258ffa..4712bc5 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2009-09-06 Richard Guenther <rguenther@suse.de> + + PR middle-end/41261 + * gcc.dg/torture/pr41261.c: New testcase. + 2009-09-05 Richard Guenther <rguenther@suse.de> PR middle-end/41181 diff --git a/gcc/testsuite/gcc.dg/torture/pr41261.c b/gcc/testsuite/gcc.dg/torture/pr41261.c new file mode 100644 index 0000000..8e60155 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr41261.c @@ -0,0 +1,8 @@ +/* { dg-do compile } */ +/* { dg-options "-fprofile-arcs" } */ + +extern void relocate_kernel(); +void machine_kexec(void *control_page) +{ + __builtin_memcpy(control_page, relocate_kernel, 2048); +} diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c index 7e83a84..89804a9 100644 --- a/gcc/tree-ssa-alias.c +++ b/gcc/tree-ssa-alias.c @@ -784,6 +784,12 @@ refs_may_alias_p_1 (ao_ref *ref1, ao_ref *ref2, bool tbaa_p) || is_gimple_min_invariant (base2)) return false; + /* We can end up refering to code via function decls. As we likely + do not properly track code aliases conservatively bail out. */ + if (TREE_CODE (base1) == FUNCTION_DECL + || TREE_CODE (base2) == FUNCTION_DECL) + return true; + /* Defer to simple offset based disambiguation if we have references based on two decls. Do this before defering to TBAA to handle must-alias cases in conformance with the |