Thumb2 parsing and encoding for DMB.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139193 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index 8a1bcc2..7fcb4b0 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -3588,3 +3588,7 @@
def : t2InstAlias<"tst${p} $Rn, $Rm",
(t2TSTrr GPRnopc:$Rn, rGPR:$Rm, pred:$p)>;
+// Memory barriers
+def : InstAlias<"dmb", (t2DMB 0xf)>, Requires<[IsThumb2, HasDB]>;
+def : InstAlias<"dsb", (t2DSB 0xf)>, Requires<[IsThumb2, HasDB]>;
+//def : InstAlias<"isb", (t2ISB 0xf)>, Requires<[IsThumb2, HasDB]>;
diff --git a/test/MC/ARM/basic-thumb2-instructions.s b/test/MC/ARM/basic-thumb2-instructions.s
index 3039f24..13cf725 100644
--- a/test/MC/ARM/basic-thumb2-instructions.s
+++ b/test/MC/ARM/basic-thumb2-instructions.s
@@ -369,6 +369,38 @@
@------------------------------------------------------------------------------
+@ DMB
+@------------------------------------------------------------------------------
+ dmb sy
+ dmb st
+ dmb sh
+ dmb ish
+ dmb shst
+ dmb ishst
+ dmb un
+ dmb nsh
+ dmb unst
+ dmb nshst
+ dmb osh
+ dmb oshst
+ dmb
+
+@ CHECK: dmb sy @ encoding: [0xbf,0xf3,0x5f,0x8f]
+@ CHECK: dmb st @ encoding: [0xbf,0xf3,0x5e,0x8f]
+@ CHECK: dmb ish @ encoding: [0xbf,0xf3,0x5b,0x8f]
+@ CHECK: dmb ish @ encoding: [0xbf,0xf3,0x5b,0x8f]
+@ CHECK: dmb ishst @ encoding: [0xbf,0xf3,0x5a,0x8f]
+@ CHECK: dmb ishst @ encoding: [0xbf,0xf3,0x5a,0x8f]
+@ CHECK: dmb nsh @ encoding: [0xbf,0xf3,0x57,0x8f]
+@ CHECK: dmb nsh @ encoding: [0xbf,0xf3,0x57,0x8f]
+@ CHECK: dmb nshst @ encoding: [0xbf,0xf3,0x56,0x8f]
+@ CHECK: dmb nshst @ encoding: [0xbf,0xf3,0x56,0x8f]
+@ CHECK: dmb osh @ encoding: [0xbf,0xf3,0x53,0x8f]
+@ CHECK: dmb oshst @ encoding: [0xbf,0xf3,0x52,0x8f]
+@ CHECK: dmb sy @ encoding: [0xbf,0xf3,0x5f,0x8f]
+
+
+@------------------------------------------------------------------------------
@ IT
@------------------------------------------------------------------------------
@ Test encodings of a few full IT blocks, not just the IT instruction
