From 1f4af262d5ad680e33a45729a8a396bd91b09662 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Thu, 5 Mar 2009 21:32:23 +0000
Subject: [PATCH] Don't use plain INC32 and DEC32 on x86-64; it needs INC64_32r
 and INC64_16r, because these instructions are encoded differently on x86-64.
 This fixes JIT regressions on x86-64 in kimwitu++ and others.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66207 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/X86/X86Instr64bit.td | 22 ++++++++++++++++++++++
 lib/Target/X86/X86InstrInfo.td  | 16 ++++++++--------
 2 files changed, 30 insertions(+), 8 deletions(-)

diff --git a/lib/Target/X86/X86Instr64bit.td b/lib/Target/X86/X86Instr64bit.td
index 01af60d6e48..a6c0800c80c 100644
--- a/lib/Target/X86/X86Instr64bit.td
+++ b/lib/Target/X86/X86Instr64bit.td
@@ -1730,6 +1730,28 @@ def : Pat<(parallel (X86smul_flag (loadi64 addr:$src1), i64immSExt32:$src2),
           (IMUL64rmi32 addr:$src1, i64immSExt32:$src2)>;
 
 // INC and DEC with EFLAGS result. Note that these do not set CF.
+def : Pat<(parallel (X86inc_flag GR16:$src), (implicit EFLAGS)),
+          (INC64_16r GR16:$src)>, Requires<[In64BitMode]>;
+def : Pat<(parallel (store (i16 (X86inc_flag (loadi16 addr:$dst))), addr:$dst),
+                    (implicit EFLAGS)),
+          (INC64_16m addr:$dst)>, Requires<[In64BitMode]>;
+def : Pat<(parallel (X86dec_flag GR16:$src), (implicit EFLAGS)),
+          (DEC64_16r GR16:$src)>, Requires<[In64BitMode]>;
+def : Pat<(parallel (store (i16 (X86dec_flag (loadi16 addr:$dst))), addr:$dst),
+                    (implicit EFLAGS)),
+          (DEC64_16m addr:$dst)>, Requires<[In64BitMode]>;
+
+def : Pat<(parallel (X86inc_flag GR32:$src), (implicit EFLAGS)),
+          (INC64_32r GR32:$src)>, Requires<[In64BitMode]>;
+def : Pat<(parallel (store (i32 (X86inc_flag (loadi32 addr:$dst))), addr:$dst),
+                    (implicit EFLAGS)),
+          (INC64_32m addr:$dst)>, Requires<[In64BitMode]>;
+def : Pat<(parallel (X86dec_flag GR32:$src), (implicit EFLAGS)),
+          (DEC64_32r GR32:$src)>, Requires<[In64BitMode]>;
+def : Pat<(parallel (store (i32 (X86dec_flag (loadi32 addr:$dst))), addr:$dst),
+                    (implicit EFLAGS)),
+          (DEC64_32m addr:$dst)>, Requires<[In64BitMode]>;
+
 def : Pat<(parallel (X86inc_flag GR64:$src), (implicit EFLAGS)),
           (INC64r GR64:$src)>;
 def : Pat<(parallel (store (i64 (X86inc_flag (loadi64 addr:$dst))), addr:$dst),
diff --git a/lib/Target/X86/X86InstrInfo.td b/lib/Target/X86/X86InstrInfo.td
index ac7b6643acc..00ebce740a5 100644
--- a/lib/Target/X86/X86InstrInfo.td
+++ b/lib/Target/X86/X86InstrInfo.td
@@ -3715,26 +3715,26 @@ def : Pat<(parallel (store (i8 (X86dec_flag (loadi8 addr:$dst))), addr:$dst),
           (DEC8m addr:$dst)>;
 
 def : Pat<(parallel (X86inc_flag GR16:$src), (implicit EFLAGS)),
-          (INC16r GR16:$src)>;
+          (INC16r GR16:$src)>, Requires<[In32BitMode]>;
 def : Pat<(parallel (store (i16 (X86inc_flag (loadi16 addr:$dst))), addr:$dst),
                     (implicit EFLAGS)),
-          (INC16m addr:$dst)>;
+          (INC16m addr:$dst)>, Requires<[In32BitMode]>;
 def : Pat<(parallel (X86dec_flag GR16:$src), (implicit EFLAGS)),
-          (DEC16r GR16:$src)>;
+          (DEC16r GR16:$src)>, Requires<[In32BitMode]>;
 def : Pat<(parallel (store (i16 (X86dec_flag (loadi16 addr:$dst))), addr:$dst),
                     (implicit EFLAGS)),
-          (DEC16m addr:$dst)>;
+          (DEC16m addr:$dst)>, Requires<[In32BitMode]>;
 
 def : Pat<(parallel (X86inc_flag GR32:$src), (implicit EFLAGS)),
-          (INC32r GR32:$src)>;
+          (INC32r GR32:$src)>, Requires<[In32BitMode]>;
 def : Pat<(parallel (store (i32 (X86inc_flag (loadi32 addr:$dst))), addr:$dst),
                     (implicit EFLAGS)),
-          (INC32m addr:$dst)>;
+          (INC32m addr:$dst)>, Requires<[In32BitMode]>;
 def : Pat<(parallel (X86dec_flag GR32:$src), (implicit EFLAGS)),
-          (DEC32r GR32:$src)>;
+          (DEC32r GR32:$src)>, Requires<[In32BitMode]>;
 def : Pat<(parallel (store (i32 (X86dec_flag (loadi32 addr:$dst))), addr:$dst),
                     (implicit EFLAGS)),
-          (DEC32m addr:$dst)>;
+          (DEC32m addr:$dst)>, Requires<[In32BitMode]>;
 
 //===----------------------------------------------------------------------===//
 // Floating Point Stack Support