[WebAssembly] Use Function::hasOptSize() (NFC)

Summary: Use member function.

Reviewers: aheejin

Subscribers: sunfish, hiraditya, sbc100, jgravelle-google, dschuff, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D60651

Patch by Hideto Ueno (uenoku)

llvm-svn: 358336

llvm/lib/Target/WebAssembly/WebAssemblyISelDAGToDAG.cpp

@@ -51,8 +51,7 @@ public:
                          "********** Function: "
                       << MF.getName() << '\n');
 
-    ForCodeSize = MF.getFunction().hasFnAttribute(Attribute::OptimizeForSize) ||
-                  MF.getFunction().hasFnAttribute(Attribute::MinSize);
+    ForCodeSize = MF.getFunction().hasOptSize();
     Subtarget = &MF.getSubtarget<WebAssemblySubtarget>();
     return SelectionDAGISel::runOnMachineFunction(MF);
   }