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 d2197b2415048cc7e1cac3335be817916967c877..469a3d88e72f44555cbb4dcde75d4826d24658df 100644 (file)
--- a/lib/Target/X86/X86RegisterInfo.td
+++ b/lib/Target/X86/X86RegisterInfo.td
@@ -312,7 +312,6 @@ def GR8 : RegisterClass<"X86", [i8],  8,
   }];
 }
 
-
 def GR16 : RegisterClass<"X86", [i16], 16,
                          [AX, CX, DX, SI, DI, BX, BP, SP,
                           R8W, R9W, R10W, R11W, R14W, R15W, R12W, R13W]> {
@@ -364,7 +363,6 @@ def GR16 : RegisterClass<"X86", [i16], 16,
   }];
 }
 
-
 def GR32 : RegisterClass<"X86", [i32], 32, 
                          [EAX, ECX, EDX, ESI, EDI, EBX, EBP, ESP,
                           R8D, R9D, R10D, R11D, R14D, R15D, R12D, R13D]> {
@@ -442,6 +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"
@@ -550,7 +553,6 @@ def GR32_NOREX : RegisterClass<"X86", [i32], 32,
     }
   }];
 }
-
 // GR64_NOREX - GR64 registers which do not require a REX prefix.
 def GR64_NOREX : RegisterClass<"X86", [i64], 64,
                                [RAX, RCX, RDX, RSI, RDI, RBX, RBP, RSP]> {
@@ -674,7 +676,9 @@ def GR64_NOREX_NOSP : RegisterClass<"X86", [i64], 64,
 }
 
 // A class to support the 'A' assembler constraint: EAX then EDX.
-def GRAD : RegisterClass<"X86", [i32], 32, [EAX, EDX]>;
+def GR32_AD : RegisterClass<"X86", [i32], 32, [EAX, EDX]> {
+  let SubRegClassList = [GR8_ABCD_L, GR8_ABCD_H, GR16_ABCD];
+}
 
 // Scalar SSE2 floating point registers.
 def FR32 : RegisterClass<"X86", [f32], 32,