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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2013-02-13 13:40:35 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2013-02-13 13:40:35 +0000 |
| commit | f09e02f01a817f4daf95ef8d3f1f2545297d32e7 (patch) | |
| tree | 73711f287e01d7e5e32364dee462c2f1f919aa5c /lib/Target/PowerPC/PPCISelDAGToDAG.cpp | |
| parent | 0f80f7bfd72c2a3b49bdd2ac6cd611cad0e6938a (diff) | |
| download | llvm-f09e02f01a817f4daf95ef8d3f1f2545297d32e7.tar.gz llvm-f09e02f01a817f4daf95ef8d3f1f2545297d32e7.tar.bz2 llvm-f09e02f01a817f4daf95ef8d3f1f2545297d32e7.tar.xz | |
X86: Disable generation of rep;movsl when %esi is used as a base pointer.
This happens when there is both stack realignment and a dynamic alloca in the
function. If we overwrite %esi (rep;movsl uses fixed registers) we'll lose the
base pointer and the next register spill will write into oblivion.
Fixes PR15249 and unbreaks firefox on i386/freebsd. Mozilla uses dynamic allocas
and freebsd a 4 byte stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175057 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCISelDAGToDAG.cpp')
0 files changed, 0 insertions, 0 deletions