Fix incorrect assert that should be a user error for code like 'mov $0, %%eax'.

[oota-llvm.git] / lib / Target / X86 / X86RegisterInfo.td

diff --git a/lib/Target/X86/X86RegisterInfo.td b/lib/Target/X86/X86RegisterInfo.td
index c6d58e9189b85f3f050fa1a8a0914534171fc566..469a3d88e72f44555cbb4dcde75d4826d24658df 100644 (file)
--- a/lib/Target/X86/X86RegisterInfo.td
+++ b/lib/Target/X86/X86RegisterInfo.td
@@ -440,6 +440,11 @@ def GR64 : RegisterClass<"X86", [i64], 64,
   }];
 }
 
+// Segment registers for use by MOV instructions (and others) that have a
+//   segment register as one operand.  Always contain a 16-bit segment
+//   descriptor.
+def SEGMENT_REG : RegisterClass<"X86", [i16], 16, [CS, DS, SS, ES, FS, GS]> {
+}
 
 // GR8_ABCD_L, GR8_ABCD_H, GR16_ABCD, GR32_ABCD, GR64_ABCD - Subclasses of
 // GR8, GR16, GR32, and GR64 which contain just the "a" "b", "c", and "d"