[ARM] Thumb2 LDR (literal) should accept PC as the destination

The version of this instruction with the .w suffix already correctly accepts
this, but the alias without the .w did not.

Differential Revision: https://reviews.llvm.org/D26499



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286446 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/ARMInstrThumb2.td

@@ -4407,7 +4407,7 @@ def : t2InstAlias<"ldrsh${p} $Rt, $addr",
                   (t2LDRSHs rGPR:$Rt, t2addrmode_so_reg:$addr, pred:$p)>;
 
 def : t2InstAlias<"ldr${p} $Rt, $addr",
-                  (t2LDRpci GPRnopc:$Rt, t2ldrlabel:$addr, pred:$p)>;
+                  (t2LDRpci GPR:$Rt, t2ldrlabel:$addr, pred:$p)>;
 def : t2InstAlias<"ldrb${p} $Rt, $addr",
                   (t2LDRBpci rGPR:$Rt, t2ldrlabel:$addr, pred:$p)>;
 def : t2InstAlias<"ldrh${p} $Rt, $addr",

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

@@ -886,6 +886,7 @@ _func:
         ldr.w r5, _foo
         ldr   lr, (_strcmp-4)
         ldr sp, _foo
+        ldr pc, _foo
 
 @ CHECK: ldr.w	r5, _foo                @ encoding: [0x5f'A',0xf8'A',A,0x50'A']
 @ CHECK: @   fixup A - offset: 0, value: _foo, kind: fixup_t2_ldst_pcrel_12
@@ -898,6 +899,10 @@ _func:
 @ CHECK: ldr.w sp, _foo                 @ encoding: [0x5f'A',0xf8'A',A,0xd0'A']
 @ CHECK: @   fixup A - offset: 0, value: _foo, kind: fixup_t2_ldst_pcrel_12
 @ CHECK-BE: ldr.w sp, _foo                 @ encoding: [0xf8'A',0x5f'A',0xd0'A',A]
+@ CHECK-BE: @   fixup A - offset: 0, value: _foo, kind: fixup_t2_ldst_pcrel_12
+@ CHECK: ldr.w pc, _foo                 @ encoding: [0x5f'A',0xf8'A',A,0xf0'A']
+@ CHECK: @   fixup A - offset: 0, value: _foo, kind: fixup_t2_ldst_pcrel_12
+@ CHECK-BE: ldr.w pc, _foo                 @ encoding: [0xf8'A',0x5f'A',0xf0'A',A]
 @ CHECK-BE: @   fixup A - offset: 0, value: _foo, kind: fixup_t2_ldst_pcrel_12
 
         ldr r7, [pc, #8]