add document in test

Author: Jinjie-Huang

bolt/lib/Core/BinaryFunction.cpp

@@ -1706,12 +1706,11 @@ bool BinaryFunction::scanExternalRefs() {
                 : TargetFunction->getSymbol();
       } else {
         TargetFunction->setIgnored();
-        Success = false;
         BC.outs() << "BOLT-WARNING: Ignoring entry point at address 0x"
                   << Twine::utohexstr(Address)
                   << " in constant island of function " << *TargetFunction
                   << '\n';
-        break;
+        continue;
       }
     }
 

bolt/test/AArch64/constant-island-entry.s

@@ -1,9 +1,14 @@
-// This test checks that we ignore functions which add an entry point that
-// is in a constant island.
+## This test checks that we ignore functions which add an entry point that
+## is in a constant island.
 
 # RUN: llvm-mc -filetype=obj -triple aarch64-unknown-unknown %s -o %t.o
 # RUN: %clang %cflags %t.o -pie -Wl,-q -o %t.exe
+
+## Check when the caller is successfully disassembled.
 # RUN: llvm-bolt %t.exe -o %t.bolt 2>&1 | FileCheck %s
+
+## Check when the caller is skipped, should trigger the identical warning
+## from a different path.
 # RUN: llvm-bolt %t.exe -o %t.bolt -skip-funcs=caller 2>&1 | FileCheck %s
 
 # CHECK: BOLT-WARNING: Ignoring entry point at address 0x{{[0-9a-f]+}} in constant island of function func