[PATCH] ARM: fix thumb coprocessor instruction with pre-writeback disassembly

[Amaury de la Vieuville]

was        stc2 p0, c0, [r0]!
instead of stc2 p0, c0, [r0,#0]!

http://llvm-reviews.chandlerc.com/D974

Files:
  lib/Target/ARM/ARMInstrThumb2.td
  test/MC/Disassembler/ARM/thumb-tests.txt

Index: lib/Target/ARM/ARMInstrThumb2.td
===================================================================
--- lib/Target/ARM/ARMInstrThumb2.td
+++ lib/Target/ARM/ARMInstrThumb2.td
@@ -3632,7 +3632,7 @@
     let DecoderMethod = "DecodeCopMemInstruction";
   }
   def _PRE : T2CI<op31_28,
-                  (outs), (ins p_imm:$cop, c_imm:$CRd, addrmode5:$addr),
+                  (outs), (ins p_imm:$cop, c_imm:$CRd, addrmode5_pre:$addr),
                   asm, "\t$cop, $CRd, $addr!"> {
     bits<13> addr;
     bits<4> cop;
Index: test/MC/Disassembler/ARM/thumb-tests.txt
===================================================================
--- test/MC/Disassembler/ARM/thumb-tests.txt
+++ test/MC/Disassembler/ARM/thumb-tests.txt
@@ -221,6 +221,9 @@
 # CHECK:	stc2	p12, c15, [r9], {137}
 0x89 0xfc 0x89 0xfc
 
+# CHECK:	stc2	p0, c0, [r0, #0]!
+0xa0 0xfd 0x00 0x00
+
 # CHECK:	vmov	r1, r0, d11
 0x50 0xec 0x1b 0x1b
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