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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.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141274 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper
2011-10-06 06:44:41 +00:00
parent cf2adb945a
commit 7ea16b01fa
6 changed files with 71 additions and 3 deletions
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utils/TableGen/EDEmitter.cpp
+3
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@@ -256,12 +256,15 @@ static int X86TypeFromOpName(LiteralConstantEmitter *type,
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");