| commit | adf9c8b0e7e7365a172e3c452dfe108f31d9a387 | [log] [tgz] |
|---|---|---|
| author | Bob Wilson <bob.wilson@apple.com> | Thu Jan 27 07:26:15 2011 +0000 |
| committer | Bob Wilson <bob.wilson@apple.com> | Thu Jan 27 07:26:15 2011 +0000 |
| tree | ad167371e73ffca0af9a3a26eec04ca1cb0ba499 | |
| 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