diff options
| author | Bob Wilson <bob.wilson@apple.com> | 2011-01-27 07:26:15 +0000 |
|---|---|---|
| committer | Bob Wilson <bob.wilson@apple.com> | 2011-01-27 07:26:15 +0000 |
| commit | adf9c8b0e7e7365a172e3c452dfe108f31d9a387 (patch) | |
| tree | ad167371e73ffca0af9a3a26eec04ca1cb0ba499 /unittests/ADT/StringRefTest.cpp | |
| parent | f382f3b4dd047a8e60371c6642d1d5a2358d3eb1 (diff) | |
Avoid modifying the OneClassForEachPhysReg map while iterating over it.
Linear scan regalloc is currently assuming that any register aliased with
a member of a regclass must also be in at least one regclass. That is not
always true. For example, for X86, RIP is in a regclass but IP is not.
If you're unlucky, this can cause a crash by invalidating the iterator.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124365 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'unittests/ADT/StringRefTest.cpp')
0 files changed, 0 insertions, 0 deletions