Thumb2 Backend: Enable Crankshaft to compile all Optimized Functions in Thumb2 mode

src/arm/builtins-arm.cc

Index: src/arm/builtins-arm.cc
diff --git a/src/arm/builtins-arm.cc b/src/arm/builtins-arm.cc
index 5f3a999f561fb183cbfcaac0dfd4de3f34f8936e..d90e31ba1f40b561eefc55189a64be3b2a20e27b 100644
--- a/src/arm/builtins-arm.cc
+++ b/src/arm/builtins-arm.cc
@@ -294,6 +294,7 @@ void Builtins::Generate_StringConstructCode(MacroAssembler* masm) {
 static void GenerateTailCallToSharedCode(MacroAssembler* masm) {
   __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
   __ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kCodeOffset));
+  __ CheckModeBit(r2);
   __ add(r2, r2, Operand(Code::kHeaderSize - kHeapObjectTag));
   __ mov(pc, r2);
 }
@@ -317,8 +318,6 @@ void Builtins::Generate_InstallRecompiledCode(MacroAssembler* masm) {
     // Push the function on the stack as the argument to the runtime function.
     __ push(r1);
     __ CallRuntime(Runtime::kInstallRecompiledCode, 1);
-    // Calculate the entry point.
-    __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
 
     // Restore call kind information.
     __ pop(r5);
@@ -329,7 +328,7 @@ void Builtins::Generate_InstallRecompiledCode(MacroAssembler* masm) {
   }
 
   // Do a tail-call of the compiled function.
-  __ Jump(r2);
+  __ Jump(r0);
 }
 
 
@@ -807,8 +806,6 @@ void Builtins::Generate_LazyCompile(MacroAssembler* masm) {
     // Push the function on the stack as the argument to the runtime function.
     __ push(r1);
     __ CallRuntime(Runtime::kLazyCompile, 1);
-    // Calculate the entry point.
-    __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
 
     // Restore call kind information.
     __ pop(r5);
@@ -819,7 +816,7 @@ void Builtins::Generate_LazyCompile(MacroAssembler* masm) {
   }
 
   // Do a tail-call of the compiled function.
-  __ Jump(r2);
+  __ Jump(r0);
 }
 
 
@@ -836,8 +833,6 @@ void Builtins::Generate_LazyRecompile(MacroAssembler* masm) {
     // Push the function on the stack as the argument to the runtime function.
     __ push(r1);
     __ CallRuntime(Runtime::kLazyRecompile, 1);
-    // Calculate the entry point.
-    __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
 
     // Restore call kind information.
     __ pop(r5);
@@ -848,7 +843,7 @@ void Builtins::Generate_LazyRecompile(MacroAssembler* masm) {
   }
 
   // Do a tail-call of the compiled function.
-  __ Jump(r2);
+  __ Jump(r0);
 }
 
 
@@ -869,7 +864,7 @@ static void GenerateMakeCodeYoungAgainCommon(MacroAssembler* masm) {
   __ CallCFunction(
       ExternalReference::get_make_code_young_function(masm->isolate()), 1);
   __ ldm(ia_w, sp, r0.bit() | r1.bit() | fp.bit() | lr.bit());
-  __ mov(pc, r0);
+  __ bx(r0);
 }
 
 #define DEFINE_CODE_AGE_BUILTIN_GENERATOR(C)                 \