pass all!

src/optimization/GVN.cpp

@@ -985,11 +985,12 @@ GVN::pretend_copy_stmt(Instruction *instr, BasicBlock *bb) {
     auto phi = static_cast<PhiInst *>(instr);
     // res = phi [op1, name1], [op2, name2]
     //            ^0   ^1       ^2   ^3
-    if (phi->get_operand(1)->get_name() == bb->get_name()) {
+    // if (phi->get_operand(1)->get_name() == bb->get_name()) {
+    if (static_cast<BasicBlock*>(phi->get_operand(1)) == bb) {
         // pretend copy statement:
         // `res = op1`
         return 0;
-    } else if (phi->get_operand(3)->get_name() == bb->get_name()) {
+    } else if (static_cast<BasicBlock*>(phi->get_operand(3)) == bb) {
         // `res = op2`
         return 2;
     }