From d7697d01674a0f51821ce009e5f46660894740e2 Mon Sep 17 00:00:00 2001
From: Anton Korobeynikov <asl@math.spbu.ru>
Date: Thu, 6 Aug 2009 11:23:24 +0000
Subject: [PATCH] We need to sext global addresses in kernel code model, not
 zext

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78299 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86Instr64bit.td | 27 +++++++++++++++++++--------
 lib/Target/X86/X86InstrInfo.td  |  8 +++++---
 2 files changed, 24 insertions(+), 11 deletions(-)

diff --git a/lib/Target/X86/X86Instr64bit.td b/lib/Target/X86/X86Instr64bit.td
index a76a056c4ea..11a9c190fc0 100644
--- a/lib/Target/X86/X86Instr64bit.td
+++ b/lib/Target/X86/X86Instr64bit.td
@@ -1478,13 +1478,13 @@ def ATOMUMAX64: I<0, Pseudo, (outs GR64:$dst),(ins i64mem:$ptr, GR64:$val),
 // code model mode, should use 'movabs'.  FIXME: This is really a hack, the
 //  'movabs' predicate should handle this sort of thing.
 def : Pat<(i64 (X86Wrapper tconstpool  :$dst)),
-          (MOV64ri tconstpool  :$dst)>, Requires<[NotSmallCode]>;
+          (MOV64ri tconstpool  :$dst)>, Requires<[FarData]>;
 def : Pat<(i64 (X86Wrapper tjumptable  :$dst)),
-          (MOV64ri tjumptable  :$dst)>, Requires<[NotSmallCode]>;
+          (MOV64ri tjumptable  :$dst)>, Requires<[FarData]>;
 def : Pat<(i64 (X86Wrapper tglobaladdr :$dst)),
-          (MOV64ri tglobaladdr :$dst)>, Requires<[NotSmallCode]>;
+          (MOV64ri tglobaladdr :$dst)>, Requires<[FarData]>;
 def : Pat<(i64 (X86Wrapper texternalsym:$dst)),
-          (MOV64ri texternalsym:$dst)>, Requires<[NotSmallCode]>;
+          (MOV64ri texternalsym:$dst)>, Requires<[FarData]>;
 
 // In static codegen with small code model, we can get the address of a label
 // into a register with 'movl'.  FIXME: This is a hack, the 'imm' predicate of
@@ -1498,22 +1498,33 @@ def : Pat<(i64 (X86Wrapper tglobaladdr :$dst)),
 def : Pat<(i64 (X86Wrapper texternalsym:$dst)),
           (MOV64ri64i32 texternalsym:$dst)>, Requires<[SmallCode]>;
 
+// In kernel code model, we can get the address of a label
+// into a register with 'movq'.  FIXME: This is a hack, the 'imm' predicate of
+// the MOV64ri32 should accept these.
+def : Pat<(i64 (X86Wrapper tconstpool  :$dst)),
+          (MOV64ri32 tconstpool  :$dst)>, Requires<[KernelCode]>;
+def : Pat<(i64 (X86Wrapper tjumptable  :$dst)),
+          (MOV64ri32 tjumptable  :$dst)>, Requires<[KernelCode]>;
+def : Pat<(i64 (X86Wrapper tglobaladdr :$dst)),
+          (MOV64ri32 tglobaladdr :$dst)>, Requires<[KernelCode]>;
+def : Pat<(i64 (X86Wrapper texternalsym:$dst)),
+          (MOV64ri32 texternalsym:$dst)>, Requires<[KernelCode]>;
 
 // If we have small model and -static mode, it is safe to store global addresses
 // directly as immediates.  FIXME: This is really a hack, the 'imm' predicate
 // for MOV64mi32 should handle this sort of thing.
 def : Pat<(store (i64 (X86Wrapper tconstpool:$src)), addr:$dst),
           (MOV64mi32 addr:$dst, tconstpool:$src)>,
-          Requires<[SmallCode, IsStatic]>;
+          Requires<[NearData, IsStatic]>;
 def : Pat<(store (i64 (X86Wrapper tjumptable:$src)), addr:$dst),
           (MOV64mi32 addr:$dst, tjumptable:$src)>,
-          Requires<[SmallCode, IsStatic]>;
+          Requires<[NearData, IsStatic]>;
 def : Pat<(store (i64 (X86Wrapper tglobaladdr:$src)), addr:$dst),
           (MOV64mi32 addr:$dst, tglobaladdr:$src)>,
-          Requires<[SmallCode, IsStatic]>;
+          Requires<[NearData, IsStatic]>;
 def : Pat<(store (i64 (X86Wrapper texternalsym:$src)), addr:$dst),
           (MOV64mi32 addr:$dst, texternalsym:$src)>,
-          Requires<[SmallCode, IsStatic]>;
+          Requires<[NearData, IsStatic]>;
 
 // Calls
 // Direct PC relative function call for small code model. 32-bit displacement
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index 880074e0273..8263b2795a7 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -253,10 +253,12 @@ def In32BitMode  : Predicate<"!Subtarget->is64Bit()">;
 def In64BitMode  : Predicate<"Subtarget->is64Bit()">;
 def IsWin64      : Predicate<"Subtarget->isTargetWin64()">;
 def NotWin64     : Predicate<"!Subtarget->isTargetWin64()">;
-def SmallCode    : Predicate<"TM.getCodeModel() == CodeModel::Small ||"
-                             "TM.getCodeModel() == CodeModel::Kernel">;
-def NotSmallCode : Predicate<"TM.getCodeModel() != CodeModel::Small &&"
+def SmallCode    : Predicate<"TM.getCodeModel() == CodeModel::Small">;
+def KernelCode   : Predicate<"TM.getCodeModel() == CodeModel::Kernel">;
+def FarData      : Predicate<"TM.getCodeModel() != CodeModel::Small &&"
                              "TM.getCodeModel() != CodeModel::Kernel">;
+def NearData     : Predicate<"TM.getCodeModel() == CodeModel::Small ||"
+                             "TM.getCodeModel() == CodeModel::Kernel">;
 def IsStatic     : Predicate<"TM.getRelocationModel() == Reloc::Static">;
 def OptForSpeed  : Predicate<"!OptForSize">;
 def FastBTMem    : Predicate<"!Subtarget->isBTMemSlow()">;
-- 
2.34.1