commit 7ea16b01fad5236cc132cb5fc3e443fcbf70d3b8
author Craig Topper <craig.topper@gmail.com> Thu Oct 06 06:44:41 2011 +0000
committer Craig Topper <craig.topper@gmail.com> Thu Oct 06 06:44:41 2011 +0000
tree 7515c555821d7894f017e592ed0aa6f1fdb25400
parent cf2adb945ab8b86996424d7e6d3f742d78c91e1e

Fix assembling of xchg %eax, %eax to not use the NOP encoding of 0x90. This was done by creating a new register group that excludes AX registers. Fixes PR10345. Also added aliases for flipping the order of the operands of xchg <reg>, %eax.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141274 91177308-0d34-0410-b5e6-96231b3b80d8

utils/TableGen/X86RecognizableInstr.cpp

diff --git a/utils/TableGen/X86RecognizableInstr.cpp b/utils/TableGen/X86RecognizableInstr.cpp
index f958966..ee9deb3 100644
--- a/utils/TableGen/X86RecognizableInstr.cpp
+++ b/utils/TableGen/X86RecognizableInstr.cpp
@@ -1064,6 +1064,9 @@
   TYPE("offset32",            TYPE_MOFFS32)
   TYPE("offset64",            TYPE_MOFFS64)
   TYPE("VR256",               TYPE_XMM256)
+  TYPE("GR16_NOAX",           TYPE_Rv)
+  TYPE("GR32_NOAX",           TYPE_Rv)
+  TYPE("GR64_NOAX",           TYPE_R64)
   errs() << "Unhandled type string " << s << "\n";
   llvm_unreachable("Unhandled type string");
 }
@@ -1205,6 +1208,9 @@
   ENCODING("GR64",            ENCODING_RO)
   ENCODING("GR16",            ENCODING_Rv)
   ENCODING("GR8",             ENCODING_RB)
+  ENCODING("GR16_NOAX",       ENCODING_Rv)
+  ENCODING("GR32_NOAX",       ENCODING_Rv)
+  ENCODING("GR64_NOAX",       ENCODING_RO)
   errs() << "Unhandled opcode modifier encoding " << s << "\n";
   llvm_unreachable("Unhandled opcode modifier encoding");
 }