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| author | H.J. Lu <hongjiu.lu@intel.com> | 2010-09-17 18:00:40 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl@gcc.gnu.org> | 2010-09-17 11:00:40 -0700 |
| commit | 2b3ded42e21a97f7d4a04f13280cc3eeb98f60ca (patch) | |
| tree | 889306a9ce992c2efd49c6bf57d4cea16247242e /gcc/calls.c | |
| parent | bf9afb7d953d7f77c6305fed27c5fcd1a485686b (diff) | |
| download | gcc-2b3ded42e21a97f7d4a04f13280cc3eeb98f60ca.zip gcc-2b3ded42e21a97f7d4a04f13280cc3eeb98f60ca.tar.gz gcc-2b3ded42e21a97f7d4a04f13280cc3eeb98f60ca.tar.bz2 | |
Make sure that all variable sized adjustments are multiple of preferred
stack boundary after stack alignment.
gcc/
2010-09-17 H.J. Lu <hongjiu.lu@intel.com>
PR middle-end/45234
* calls.c (expand_call): Make sure that all variable sized
adjustments are multiple of preferred stack boundary after
stack alignment.
gcc/testsuite/
2010-09-17 H.J. Lu <hongjiu.lu@intel.com>
PR middle-end/45234
* gcc.dg/torture/stackalign/alloca-5.c: New.
From-SVN: r164377
Diffstat (limited to 'gcc/calls.c')
| -rw-r--r-- | gcc/calls.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/calls.c b/gcc/calls.c index 3888831..b3109cee 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -2385,6 +2385,19 @@ expand_call (tree exp, rtx target, int ignore) preferred_unit_stack_boundary = preferred_stack_boundary / BITS_PER_UNIT; + if (SUPPORTS_STACK_ALIGNMENT) + { + /* All variable sized adjustments must be multiple of preferred + stack boundary. Stack alignment may change preferred stack + boundary after variable sized adjustments have been made. We + need to compensate it here. */ + unsigned HOST_WIDE_INT delta + = ((stack_pointer_delta - pending_stack_adjust) + % preferred_unit_stack_boundary); + if (delta) + anti_adjust_stack (GEN_INT (preferred_unit_stack_boundary - delta)); + } + /* We want to make two insn chains; one for a sibling call, the other for a normal call. We will select one of the two chains after initial RTL generation is complete. */ |