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[Bug rtl-optimization/40838] gcc shouldn't assume that the stack is aligned
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 29 Apr 2010 07:50:44 -0000
- Subject: [Bug rtl-optimization/40838] gcc shouldn't assume that the stack is aligned
- References: <bug-40838-1600@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #73 from ubizjak at gmail dot com 2010-04-29 07:50 -------
>From the manual:
`-mstackrealign'
Realign the stack at entry. On the Intel x86, the `-mstackrealign'
option will generate an alternate prologue and epilogue that
realigns the runtime stack if necessary. This supports mixing
legacy codes that keep a 4-byte aligned stack with modern codes
that keep a 16-byte stack for SSE compatibility. See also the
attribute `force_align_arg_pointer', applicable to individual
functions.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40838