From 54319e2a8c22e7ee7044e398fbd8d4287e2b7c4f Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Tue, 1 May 2012 21:17:34 +0000
Subject: [PATCH] ARM: Add a few missing add->sub aliases w/ 'w' suffix.

Aliases for adding a negative immediate when using an explicit 'w'
suffix. E.g.,
        adds.w r2, #-16
        adds.w r2, r2, #-16
        addw r2, #-16
        addw r2, #-16
        addw r2, r2, #-16

rdar://11330769

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155946 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMInstrThumb2.td        | 11 +++++++++++
 test/MC/ARM/basic-thumb2-instructions.s | 12 ++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index a166b27042d..2b944227486 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -3969,6 +3969,17 @@ def : t2InstAlias<"add${s}${p} $Rdn, $imm",
 def : t2InstAlias<"add${p} $Rdn, $imm",
            (t2SUBri12 GPRnopc:$Rdn, GPRnopc:$Rdn, imm0_4095_neg:$imm, pred:$p)>;
 
+def : t2InstAlias<"add${s}${p}.w $Rd, $Rn, $imm",
+        (t2SUBri GPRnopc:$Rd, GPRnopc:$Rn, t2_so_imm_neg:$imm, pred:$p,
+                 cc_out:$s)>;
+def : t2InstAlias<"addw${p} $Rd, $Rn, $imm",
+           (t2SUBri12 GPRnopc:$Rd, GPR:$Rn, imm0_4095_neg:$imm, pred:$p)>;
+def : t2InstAlias<"add${s}${p}.w $Rdn, $imm",
+      (t2SUBri GPRnopc:$Rdn, GPRnopc:$Rdn, t2_so_imm_neg:$imm, pred:$p,
+               cc_out:$s)>;
+def : t2InstAlias<"addw${p} $Rdn, $imm",
+           (t2SUBri12 GPRnopc:$Rdn, GPRnopc:$Rdn, imm0_4095_neg:$imm, pred:$p)>;
+
 
 // Aliases for SUB without the ".w" optional width specifier.
 def : t2InstAlias<"sub${s}${p} $Rd, $Rn, $imm",
diff --git a/test/MC/ARM/basic-thumb2-instructions.s b/test/MC/ARM/basic-thumb2-instructions.s
index a0dc3dd3a1f..2104be36941 100644
--- a/test/MC/ARM/basic-thumb2-instructions.s
+++ b/test/MC/ARM/basic-thumb2-instructions.s
@@ -80,6 +80,12 @@ _func:
         adds r2, r2, #56
         adds r2, #56
 
+        adds.w r2, #-16
+        adds.w r2, r2, #-16
+        addw r2, #-16
+        addw r2, #-16
+        addw r2, r2, #-16
+
 @ CHECK: itet	eq                      @ encoding: [0x0a,0xbf]
 @ CHECK: addeq	r1, r2, #4              @ encoding: [0x11,0x1d]
 @ CHECK: addwne	r5, r3, #1023           @ encoding: [0x03,0xf2,0xff,0x35]
@@ -96,6 +102,12 @@ _func:
 @ CHECK: adds	r2, #56                 @ encoding: [0x38,0x32]
 @ CHECK: adds	r2, #56                 @ encoding: [0x38,0x32]
 
+@ CHECK: subs.w	r2, r2, #16             @ encoding: [0xb2,0xf1,0x10,0x02]
+@ CHECK: subs.w	r2, r2, #16             @ encoding: [0xb2,0xf1,0x10,0x02]
+@ CHECK: subw	r2, r2, #16             @ encoding: [0xa2,0xf2,0x10,0x02]
+@ CHECK: subw	r2, r2, #16             @ encoding: [0xa2,0xf2,0x10,0x02]
+@ CHECK: subw	r2, r2, #16             @ encoding: [0xa2,0xf2,0x10,0x02]
+
 
 @------------------------------------------------------------------------------
 @ ADD (register)
-- 
2.34.1