[llvm] r186459 - ARM: Add support for the Thumb2 PLI alternate literal form.

[Tilmann Scheller]

Author: tilmann
Date: Tue Jul 16 16:52:34 2013
New Revision: 186459

URL: http://llvm.org/viewvc/llvm-project?rev=186459&view=rev
Log:
ARM: Add support for the Thumb2 PLI alternate literal form.

This adds an instruction alias to make the assembler recognize the alternate literal form: pli [PC, #+/-<imm>]

See A8.8.129 in the ARM ARM (DDI 0406C.b).

Fixes <rdar://problem/14403733>.


Modified:
    llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
    llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s

Modified: llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td?rev=186459&r1=186458&r2=186459&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td (original)
+++ llvm/trunk/lib/Target/ARM/ARMInstrThumb2.td Tue Jul 16 16:52:34 2013
@@ -4427,3 +4427,6 @@ def : t2InstAlias<"ldrsh${p}.w $Rt, $add
 
 def : t2InstAlias<"add${p} $Rd, pc, $imm",
                   (t2ADR rGPR:$Rd, imm0_4095:$imm, pred:$p)>;
+
+// PLI with alternate literal form.
+def : t2InstAlias<"pli${p} $addr", (t2PLIpci t2ldr_pcrel_imm12:$addr, pred:$p)>;

Modified: llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s?rev=186459&r1=186458&r2=186459&view=diff
==============================================================================
--- llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s (original)
+++ llvm/trunk/test/MC/ARM/basic-thumb2-instructions.s Tue Jul 16 16:52:34 2013
@@ -1599,12 +1599,16 @@ _func:
         pli [r6, #33]
         pli [r6, #257]
         pli [r7, #257]
+        pli [pc, #+4095]
+        pli [pc, #-4095]
 
 @ CHECK: pli	[r5, #-4]               @ encoding: [0x15,0xf9,0x04,0xfc]
 @ CHECK: pli	[r6, #32]               @ encoding: [0x96,0xf9,0x20,0xf0]
 @ CHECK: pli	[r6, #33]               @ encoding: [0x96,0xf9,0x21,0xf0]
 @ CHECK: pli	[r6, #257]              @ encoding: [0x96,0xf9,0x01,0xf1]
 @ CHECK: pli	[r7, #257]              @ encoding: [0x97,0xf9,0x01,0xf1]
+@ CHECK: pli    [pc, #4095]             @ encoding: [0x9f,0xf9,0xff,0xff]
+@ CHECK: pli    [pc, #-4095]            @ encoding: [0x1f,0xf9,0xff,0xff]
 
 
 @------------------------------------------------------------------------------