1 files changed, 14 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMConstantIslandPass.cpp b/lib/Target/ARM/ARMConstantIslandPass.cpp
index dd81796e8a..f8f717e4d4 100644
--- a/lib/Target/ARM/ARMConstantIslandPass.cpp
+++ b/lib/Target/ARM/ARMConstantIslandPass.cpp
@@ -1576,6 +1576,16 @@ bool ARMConstantIslands::OptimizeThumb2Instructions(MachineFunction &MF) {
         Scale = 4;
       }
       break;
+    case ARM::t2LDRi12:
+      // FIXME: Temporary workaround for a  bug introduced by r121082.
+      // We should use t2LDRpci for loads from constantpools.
+      if (isARMLowRegister(U.MI->getOperand(0).getReg()) &&
+          U.MI->getOperand(1).getReg() == ARM::PC) {
+        NewOpc = ARM::tLDRpci;
+        Bits = 8;
+        Scale = 4;
+      }
+      break;
     }
 
     if (!NewOpc)
@@ -1586,6 +1596,10 @@ bool ARMConstantIslands::OptimizeThumb2Instructions(MachineFunction &MF) {
     // FIXME: Check if offset is multiple of scale if scale is not 4.
     if (CPEIsInRange(U.MI, UserOffset, U.CPEMI, MaxOffs, false, true)) {
       U.MI->setDesc(TII->get(NewOpc));
+      if (NewOpc == ARM::tLDRpci)
+        // FIXME: Temporary workaround.
+        // PC is now an implicit operand.
+        U.MI->RemoveOperand(1);
       MachineBasicBlock *MBB = U.MI->getParent();
       BBSizes[MBB->getNumber()] -= 2;
       AdjustBBOffsetsAfter(MBB, -2);