Thumb2 t2LDMDB[_UPD] assembly parsing to recognize .w suffix.

rdar://10348844

llvm-svn: 143110

Author: Jim Grosbach

llvm/lib/Target/ARM/ARMInstrThumb2.td

@@ -3944,6 +3944,12 @@ def : t2InstAlias<"push${p} $regs", (t2STMDB_UPD SP, pred:$p, reglist:$regs)>;
 def : t2InstAlias<"pop${p}.w $regs", (t2LDMIA_UPD SP, pred:$p, reglist:$regs)>;
 def : t2InstAlias<"pop${p} $regs", (t2LDMIA_UPD SP, pred:$p, reglist:$regs)>;
 
+// LDMDB/LDMDB_UPD aliases w/ the optional .w suffix
+def : t2InstAlias<"ldmdb${p}.w $Rn, $regs",
+                  (t2LDMDB GPR:$Rn, pred:$p, reglist:$regs)>;
+def : t2InstAlias<"ldmdb${p}.w $Rn!, $regs",
+                  (t2LDMDB_UPD GPR:$Rn, pred:$p, reglist:$regs)>;
+
 // Alias for REV/REV16/REVSH without the ".w" optional width specifier.
 def : t2InstAlias<"rev${p} $Rd, $Rm", (t2REV rGPR:$Rd, rGPR:$Rm, pred:$p)>;
 def : t2InstAlias<"rev16${p} $Rd, $Rm", (t2REV16 rGPR:$Rd, rGPR:$Rm, pred:$p)>;

llvm/test/MC/ARM/basic-thumb2-instructions.s

@@ -599,11 +599,15 @@ _func:
         ldmdb r4, {r5, r6}
         ldmdb r5!, {r3, r8}
         ldmea r5!, {r3, r8}
+        ldmdb.w r4, {r5, r6}
+        ldmdb.w r5!, {r3, r8}
 
 @ CHECK: ldmdb	r4, {r4, r5, r8, r9}    @ encoding: [0x14,0xe9,0x30,0x03]
 @ CHECK: ldmdb	r4, {r5, r6}            @ encoding: [0x14,0xe9,0x60,0x00]
 @ CHECK: ldmdb	r5!, {r3, r8}           @ encoding: [0x35,0xe9,0x08,0x01]
 @ CHECK: ldmdb	r5!, {r3, r8}           @ encoding: [0x35,0xe9,0x08,0x01]
+@ CHECK: ldmdb	r4, {r5, r6}            @ encoding: [0x14,0xe9,0x60,0x00]
+@ CHECK: ldmdb	r5!, {r3, r8}           @ encoding: [0x35,0xe9,0x08,0x01]
 
 
 @------------------------------------------------------------------------------