Post process 'and', 'sub' instructions and select better encoding, if available.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148489 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/MC/X86/intel-syntax-encoding.s b/test/MC/X86/intel-syntax-encoding.s
index 23eff01..c81636b 100644
--- a/test/MC/X86/intel-syntax-encoding.s
+++ b/test/MC/X86/intel-syntax-encoding.s
@@ -24,3 +24,11 @@
// CHECK: encoding: [0x48,0x89,0x44,0x24,0xf0]
mov QWORD PTR [RSP - 16], RAX
+// CHECK: encoding: [0x66,0x83,0xc0,0xf4]
+ add ax, -12
+// CHECK: encoding: [0x83,0xc0,0xf4]
+ add eax, -12
+// CHECK: encoding: [0x48,0x83,0xc0,0xf4]
+ add rax, -12
+
+