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Diffstat (limited to 'test/pending/jvm/constant-optimization/Test.scala')
-rw-r--r-- | test/pending/jvm/constant-optimization/Test.scala | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/test/pending/jvm/constant-optimization/Test.scala b/test/pending/jvm/constant-optimization/Test.scala new file mode 100644 index 0000000000..dc0f8f6103 --- /dev/null +++ b/test/pending/jvm/constant-optimization/Test.scala @@ -0,0 +1,27 @@ + +import scala.tools.partest.BytecodeTest +import scala.tools.asm +import asm.tree.InsnList +import scala.collection.JavaConverters._ + +object Test extends BytecodeTest { + val comparisons = Set(asm.Opcodes.IF_ACMPEQ, asm.Opcodes.IF_ACMPNE, asm.Opcodes.IF_ICMPEQ, asm.Opcodes.IF_ICMPGE, asm.Opcodes.IF_ICMPGT, asm.Opcodes.IF_ICMPLE, + asm.Opcodes.IF_ICMPLT, asm.Opcodes.IF_ICMPNE, asm.Opcodes.IFEQ, asm.Opcodes.IFGE, asm.Opcodes.IFGT, asm.Opcodes.IFLE, asm.Opcodes.IFLT, + asm.Opcodes.IFNE, asm.Opcodes.IFNONNULL, asm.Opcodes.IFNULL) + + def show: Unit = { + val classNode = loadClassNode("Foo_1") + val methodNode = getMethod(classNode, "foo") + // after optimization there should be no comparisons left + val expected = 0 + + val got = countComparisons(methodNode.instructions) + assert(got == expected, s"expected $expected but got $got comparisons") + } + + def countComparisons(insnList: InsnList): Int = { + def isComparison(node: asm.tree.AbstractInsnNode): Boolean = + (comparisons contains node.getOpcode) + insnList.iterator.asScala count isComparison + } +}
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