MIPS: Fixes for patch sites if long branches are emitted.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index a2df23fc5a88bcd6278f2a46a3b70fc3944bb6bd..440cfc75789890f289d7a9f90a923a087e8c80a2 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -2613,10 +2613,10 @@ void LCodeGen::DoInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr) {
   Handle<Cell> cell = factory()->NewCell(factory()->the_hole_value());
   __ li(at, Operand(Handle<Object>(cell)));
   __ lw(at, FieldMemOperand(at, PropertyCell::kValueOffset));
-  __ Branch(&cache_miss, ne, map, Operand(at));
+  __ BranchShort(&cache_miss, ne, map, Operand(at));
   // 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.
+  // with true or false. The distance from map check has to be constant.
   __ li(result, Operand(factory()->the_hole_value()), CONSTANT_SIZE);
   __ Branch(&done);
 
@@ -3755,6 +3755,7 @@ void LCodeGen::DoPower(LPower* instr) {
     Label no_deopt;
     __ JumpIfSmi(a2, &no_deopt);
     __ lw(t3, FieldMemOperand(a2, HeapObject::kMapOffset));
+    __ LoadRoot(at, Heap::kHeapNumberMapRootIndex);
     DeoptimizeIf(ne, instr->environment(), t3, Operand(at));
     __ bind(&no_deopt);
     MathPowStub stub(MathPowStub::TAGGED);