Enable constant pool support.

src/ppc/lithium-codegen-ppc.cc

Index: src/ppc/lithium-codegen-ppc.cc
diff --git a/src/ppc/lithium-codegen-ppc.cc b/src/ppc/lithium-codegen-ppc.cc
index 207075534c32ce0e32851eb5a1b3708ed9157f29..c404ff246e99fc32db8c8278ab991546986b0a79 100644
--- a/src/ppc/lithium-codegen-ppc.cc
+++ b/src/ppc/lithium-codegen-ppc.cc
@@ -50,8 +50,15 @@ bool LCodeGen::GenerateCode() {
   // the frame (that is done in GeneratePrologue).
   FrameScope frame_scope(masm_, StackFrame::NONE);
 
-  return GeneratePrologue() && GenerateBody() && GenerateDeferredCode() &&
-         GenerateJumpTable() && GenerateSafepointTable();
+  bool rc = GeneratePrologue() && GenerateBody() && GenerateDeferredCode() &&
+            GenerateJumpTable() && GenerateSafepointTable();
+#ifdef DEBUG
+  if (!rc) {
+    // Avoid DCHECK(!is_linked()) failure in ~Label()
+    masm()->EmitConstantPool();
+  }
+#endif
+  return rc;
 }
 
 
@@ -372,6 +379,8 @@ bool LCodeGen::GenerateJumpTable() {
     __ Jump(ip);
   }
 
+  masm()->EmitConstantPool();
+
   // The deoptimization jump table is the last part of the instruction
   // sequence. Mark the generated code as done unless we bailed out.
   if (!is_aborted()) status_ = DONE;
@@ -2885,7 +2894,7 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   Register map = temp;
   __ LoadP(map, FieldMemOperand(object, HeapObject::kMapOffset));
   {
-    // Block constant pool emission to ensure the positions of instructions are
+    // Block trampoline emission to ensure the positions of instructions are
     // as expected by the patcher. See InstanceofStub::Generate().
     Assembler::BlockTrampolinePoolScope block_trampoline_pool(masm_);
     __ bind(deferred->map_check());  // Label for calculating code patching.
@@ -2896,7 +2905,7 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
     __ mov(ip, Operand(cell));
     __ LoadP(ip, FieldMemOperand(ip, Cell::kValueOffset));
     __ cmp(map, ip);
-    __ bne(&cache_miss);
+    __ bc_short(ne, &cache_miss);
     // We use Factory::the_hole_value() on purpose instead of loading from the
     // root array to force relocation to be able to later patch
     // with true or false.