commit 25f6dfd108801d1dc5877c420ef0dd47131aeda7
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

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

utils/TableGen/X86DisassemblerTables.cpp

diff --git a/utils/TableGen/X86DisassemblerTables.cpp b/utils/TableGen/X86DisassemblerTables.cpp
index 218a1a2..f42119c 100644
--- a/utils/TableGen/X86DisassemblerTables.cpp
+++ b/utils/TableGen/X86DisassemblerTables.cpp
@@ -620,6 +620,7 @@
         
         if(previousInfo.name == "NOOP" && (newInfo.name == "XCHG16ar" ||
                                            newInfo.name == "XCHG32ar" ||
+                                           newInfo.name == "XCHG32ar64" ||
                                            newInfo.name == "XCHG64ar"))
           continue; // special case for XCHG*ar and NOOP