From: Keith Walker <kwalker@arm.com>
Date: Tue, 5 Aug 2014 15:11:59 +0000 (+0000)
Subject: Specify that the thumb setend and blx <immed> instructions are not valid on an m... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f2115a0b0dc449684261323b047a25dae529f7b7;p=llvm

Specify that the thumb setend and blx <immed> instructions are not valid on an m-class target

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214871 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/ARMInstrThumb.td b/lib/Target/ARM/ARMInstrThumb.td
index e17f73af03e..775b3fb7006 100644
--- a/lib/Target/ARM/ARMInstrThumb.td
+++ b/lib/Target/ARM/ARMInstrThumb.td
@@ -311,7 +311,7 @@ def tHLT : T1I<(outs), (ins imm0_63:$val), NoItinerary, "hlt\t$val",
 }
 
 def tSETEND : T1I<(outs), (ins setend_op:$end), NoItinerary, "setend\t$end",
-                  []>, T1Encoding<0b101101>, Deprecated<HasV8Ops> {
+                  []>, T1Encoding<0b101101>, Requires<[IsNotMClass]>, Deprecated<HasV8Ops> {
   bits<1> end;
   // A8.6.156
   let Inst{9-5} = 0b10010;
@@ -466,7 +466,7 @@ let isCall = 1,
                  (outs), (ins pred:$p, t_blxtarget:$func), IIC_Br,
                    "blx${p}\t$func",
                    [(ARMcall tglobaladdr:$func)]>,
-              Requires<[IsThumb, HasV5T]>, Sched<[WriteBrL]> {
+              Requires<[IsThumb, HasV5T, IsNotMClass]>, Sched<[WriteBrL]> {
     bits<24> func;
     let Inst{26} = func{23};
     let Inst{25-16} = func{20-11};
diff --git a/test/MC/ARM/thumb-not-mclass.s b/test/MC/ARM/thumb-not-mclass.s
new file mode 100644
index 00000000000..fec545e64b0
--- /dev/null
+++ b/test/MC/ARM/thumb-not-mclass.s
@@ -0,0 +1,26 @@
+@ RUN: not llvm-mc -triple=thumbv7m-apple-darwin -show-encoding < %s 2> %t
+@ RUN: FileCheck < %t %s
+@ RUN: not llvm-mc -triple=thumbv6m -show-encoding < %s 2> %t
+@ RUN: FileCheck < %t %s
+  .syntax unified
+  .globl _func
+
+@ Check that the assembler rejects thumb instructions that are not valid
+@ on mclass.
+
+@------------------------------------------------------------------------------
+@ BLX (immediate)
+@------------------------------------------------------------------------------
+        blx _baz
+
+@ CHECK: error: instruction requires: !armv*m
+
+@------------------------------------------------------------------------------
+@ SETEND
+@------------------------------------------------------------------------------
+
+        setend be
+        setend le
+
+@ CHECK: error: invalid operand for instruction
+@ CHECK: error: invalid operand for instruction