From 358f1ef765ba1b385795e03c80fdd4cbd924d010 Mon Sep 17 00:00:00 2001
From: Sean Callanan <scallanan@apple.com>
Date: Wed, 16 Sep 2009 21:55:34 +0000
Subject: [PATCH] Added the LAR (load segment access rights) instructions to
 the Intel instruction tables.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@82084 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86Instr64bit.td |  8 ++++++++
 lib/Target/X86/X86InstrInfo.td  | 13 +++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/lib/Target/X86/X86Instr64bit.td b/lib/Target/X86/X86Instr64bit.td
index 515120b0307..e6588f6bd01 100644
--- a/lib/Target/X86/X86Instr64bit.td
+++ b/lib/Target/X86/X86Instr64bit.td
@@ -1541,6 +1541,14 @@ def ATOMUMAX64: I<0, Pseudo, (outs GR64:$dst),(ins i64mem:$ptr, GR64:$val),
                [(set GR64:$dst, (atomic_load_umax_64 addr:$ptr, GR64:$val))]>;
 }
 
+// Segmentation support instructions
+
+// i16mem operand in LAR64rm and GR32 operand in LAR32rr is not a typo.
+def LAR64rm : RI<0x02, MRMSrcMem, (outs GR64:$dst), (ins i16mem:$src), 
+                 "lar{q}\t{$src, $dst|$dst, $src}", []>, TB;
+def LAR64rr : RI<0x02, MRMSrcReg, (outs GR64:$dst), (ins GR32:$src),
+                 "lar{q}\t{$src, $dst|$dst, $src}", []>, TB;
+
 //===----------------------------------------------------------------------===//
 // Non-Instruction Patterns
 //===----------------------------------------------------------------------===//
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index 570c54d96df..f84b274a3e3 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -3672,6 +3672,19 @@ def ATOMSWAP6432 : I<0, Pseudo, (outs GR32:$dst1, GR32:$dst2),
                "#ATOMSWAP6432 PSEUDO!", []>;
 }
 
+// Segmentation support instructions.
+
+def LAR16rm : I<0x02, MRMSrcMem, (outs GR16:$dst), (ins i16mem:$src), 
+                "lar{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;
+def LAR16rr : I<0x02, MRMSrcReg, (outs GR16:$dst), (ins GR16:$src),
+                "lar{w}\t{$src, $dst|$dst, $src}", []>, TB, OpSize;
+
+// i16mem operand in LAR32rm and GR32 operand in LAR32rr is not a typo.
+def LAR32rm : I<0x02, MRMSrcMem, (outs GR32:$dst), (ins i16mem:$src), 
+                "lar{l}\t{$src, $dst|$dst, $src}", []>, TB;
+def LAR32rr : I<0x02, MRMSrcReg, (outs GR32:$dst), (ins GR32:$src),
+                "lar{l}\t{$src, $dst|$dst, $src}", []>, TB;
+
 //===----------------------------------------------------------------------===//
 // Non-Instruction Patterns
 //===----------------------------------------------------------------------===//