PPC: [strong] Check arity of functions

Port 3226e980

Original commit message:
In strong mode it is an error to call a function with too few
arguments.

This is enforced inside the ArgumentsAdaptorTrampoline.

This does not yet handle rest parameters

R=arv@chromium.org, dstence@us.ibm.com, michael_dawson@ca.ibm.com
BUG=

Review URL: https://codereview.chromium.org/1132153003

Cr-Commit-Position: refs/heads/master@{#28348}

src/ppc/builtins-ppc.cc

@@ -1763,6 +1763,27 @@ void Builtins::Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm) {
 
   {  // Too few parameters: Actual < expected
     __ bind(&too_few);
+
+    // If the function is strong we need to throw an error.
+    Label weak_function;
+    __ LoadP(r7, FieldMemOperand(r4, JSFunction::kSharedFunctionInfoOffset));
+    __ lwz(r7, FieldMemOperand(r7, SharedFunctionInfo::kCompilerHintsOffset));
+    __ TestBit(r7,
+#if V8_TARGET_ARCH_PPC64
+               SharedFunctionInfo::kStrongModeFunction,
+#else
+               SharedFunctionInfo::kStrongModeFunction + kSmiTagSize,
+#endif
+               r0);
+    __ beq(&weak_function, cr0);
+
+    {
+      FrameScope frame(masm, StackFrame::MANUAL);
+      EnterArgumentsAdaptorFrame(masm);
+      __ CallRuntime(Runtime::kThrowStrongModeTooFewArguments, 0);
+    }
+
+    __ bind(&weak_function);
     EnterArgumentsAdaptorFrame(masm);
 
     // Calculate copy start address into r0 and copy end address is fp.