From 642caea2c624aaeb492a112d60f419ee4d1a10c7 Mon Sep 17 00:00:00 2001
From: Jim Grosbach <grosbach@apple.com>
Date: Fri, 16 Sep 2011 21:06:12 +0000
Subject: [PATCH] Thumb2 assembly parsing and encoding for STR(immediate).

Add aliases for STRB/STRH while there. Tests forthcoming for those.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139942 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMInstrThumb2.td        | 16 ++++++++++++++++
 test/MC/ARM/basic-thumb2-instructions.s | 16 ++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index 4d15b0201dd..5ad65d76cf7 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -3864,3 +3864,19 @@ def : t2InstAlias<"usat${p} $Rd, $sat_imm, $Rn",
 // STM w/o the .w suffix.
 def : t2InstAlias<"stm${p} $Rn, $regs",
                   (t2STMIA GPR:$Rn, pred:$p, reglist:$regs)>;
+
+// Alias for STR, STRB, and STRH without the ".w" optional
+// width specifier.
+def : t2InstAlias<"str${p} $Rt, $addr",
+                  (t2STRi12 GPR:$Rt, t2addrmode_imm12:$addr, pred:$p)>;
+def : t2InstAlias<"strb${p} $Rt, $addr",
+                  (t2STRBi12 rGPR:$Rt, t2addrmode_imm12:$addr, pred:$p)>;
+def : t2InstAlias<"strh${p} $Rt, $addr",
+                  (t2STRHi12 rGPR:$Rt, t2addrmode_imm12:$addr, pred:$p)>;
+
+def : t2InstAlias<"str${p} $Rt, $addr",
+                  (t2STRs GPR:$Rt, t2addrmode_so_reg:$addr, pred:$p)>;
+def : t2InstAlias<"strb${p} $Rt, $addr",
+                  (t2STRBs rGPR:$Rt, t2addrmode_so_reg:$addr, pred:$p)>;
+def : t2InstAlias<"strh${p} $Rt, $addr",
+                  (t2STRHs rGPR:$Rt, t2addrmode_so_reg:$addr, pred:$p)>;
diff --git a/test/MC/ARM/basic-thumb2-instructions.s b/test/MC/ARM/basic-thumb2-instructions.s
index 160ed80d3ae..3c64c7d8a27 100644
--- a/test/MC/ARM/basic-thumb2-instructions.s
+++ b/test/MC/ARM/basic-thumb2-instructions.s
@@ -2160,6 +2160,22 @@ _func:
 @ CHECK: stm.w	r5!, {r3, r8}           @ encoding: [0xa5,0xe8,0x08,0x01]
 
 
+@------------------------------------------------------------------------------
+@ STR(immediate)
+@------------------------------------------------------------------------------
+        str r5, [r5, #-4]
+        str r5, [r6, #32]
+        str r5, [r6, #33]
+        str r5, [r6, #257]
+        str.w pc, [r7, #257]
+
+@ CHECK: str	r5, [r5, #-4]           @ encoding: [0x45,0xf8,0x04,0x5c]
+@ CHECK: str	r5, [r6, #32]           @ encoding: [0x35,0x62]
+@ CHECK: str.w	r5, [r6, #33]           @ encoding: [0xc6,0xf8,0x21,0x50]
+@ CHECK: str.w	r5, [r6, #257]          @ encoding: [0xc6,0xf8,0x01,0x51]
+@ CHECK: str.w	pc, [r7, #257]          @ encoding: [0xc7,0xf8,0x01,0xf1]
+
+
 @------------------------------------------------------------------------------
 @ SUB (register)
 @------------------------------------------------------------------------------
-- 
2.34.1