| commit | 25f6dfd108801d1dc5877c420ef0dd47131aeda7 | [log] [tgz] |
|---|---|---|
| author | Craig Topper <craig.topper@gmail.com> | Fri Oct 07 05:35:38 2011 +0000 |
| committer | Craig Topper <craig.topper@gmail.com> | Fri Oct 07 05:35:38 2011 +0000 |
| tree | 19b85532007f5e2d8b574e7029b8c10d31010c14 | |
| parent | 217f0e9ca494a1752c591f50f04b4143eb1763c5 [diff] |
Revert part of r141274. Only need to change encoding for xchg %eax, %eax in 64-bit mode. This is because in 64-bit mode xchg %eax, %eax implies zeroing the upper 32-bits of RAX which makes it not a NOP. In 32-bit mode using NOP encoding is fine. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141353 91177308-0d34-0410-b5e6-96231b3b80d8