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.
llvm-svn: 141274
diff --git a/llvm/utils/TableGen/EDEmitter.cpp b/llvm/utils/TableGen/EDEmitter.cpp
index 85f7e1f..b5fe7e6 100644
--- a/llvm/utils/TableGen/EDEmitter.cpp
+++ b/llvm/utils/TableGen/EDEmitter.cpp
@@ -256,12 +256,15 @@
REG("GR8");
REG("GR8_NOREX");
REG("GR16");
+ REG("GR16_NOAX");
REG("GR32");
+ REG("GR32_NOAX");
REG("GR32_NOREX");
REG("GR32_TC");
REG("FR32");
REG("RFP32");
REG("GR64");
+ REG("GR64_NOAX");
REG("GR64_TC");
REG("FR64");
REG("VR64");