RFR: 8275086: compiler/c2/irTests/TestPostParseCallDevirtualization.java fails when compiler1 is disabled

[SUN Guoyun]

On Tue, 12 Oct 2021 02:49:53 GMT, SUN Guoyun <duke at openjdk.java.net> wrote:

> Hi all,
> Jtreg test case compiler/c2/irTests/TestPostParseCallDevirtualization.java fails for fastdebug mode on x86/aarch64/mips architecture when "--with-jvm-features=-compiler1" be used. the failed info is:
> 
> <pre><code class="shell">
> One or more @IR rules failed:
> 
> Failed IR Rules (1)
> ------------------
> - Method "public int compiler.c2.irTests.TestPostParseCallDevirtualization.testMethodHandleCallWithCCP() throws java.lang.Throwable":
>   * @IR rule 1: "@compiler.lib.ir_framework.IR(failOn={"#PRE#(\\\\d+(\\\\s){2}(CallStaticJava.*)+(\\\\s){2}===.*#IS_REPLACED#)", "invokeBasic"}, applyIf={}, applyIfAnd={}, applyIfOr={}, counts={"#PRE#(\\\\d+(\\\\s){2}(CallStaticJava.*)+(\\\\s){2}===.*#IS_REPLACED#)", "invokeStatic", "= 1"}, applyIfNot={})" 
>     - failOn: Graph contains forbidden nodes:
>         Regex 1: (\\d+(\\s){2}(CallStaticJava.*)+(\\s){2}===.*invokeBasic)
>         Matched forbidden node:
>           280  CallStaticJava  ===  5  6  7  8  1 ( 188  1  1  1  1  1  1 ) [[ 281  282  283  285 ]] # Static  java.lang.invoke.MethodHandle::invokeBasic
>     - counts: Graph contains wrong number of nodes:
>         Regex 1: (\\d+(\\s){2}(CallStaticJava.*)+(\\s){2}===.*invokeStatic)
>         Expected 1 but found 0 nodes.
> 
>>>> Check stdout for compilation output of the failed methods
> </code></pre>
> 
> This is a patch to fix this problem. Please help review it.
> 
> Thanks,
> Sun Guoyun

I found the compilation info with c1 is:
`
 937    b  3       compiler.c2.irTests.TestPostParseCallDevirtualization::testMethodHandleCallWithCCP (50 bytes)
 938    b  1       compiler.c2.irTests.TestPostParseCallDevirtualization::method2 (3 bytes)
 939    b  3       java.lang.reflect.Method::getParameterCount (6 bytes)
 940    b  3       java.lang.reflect.Method::invoke (65 bytes)          
 941    b  3       jdk.internal.reflect.DelegatingMethodAccessorImpl::invoke (10 bytes)
 942   !b  3       compiler.lib.ir_framework.test.CustomRunTest::invokeTest (76 bytes)
 943    b  3       jdk.test.lib.Asserts::assertEquals (7 bytes)         
 944   !b  3       jdk.internal.reflect.GeneratedMethodAccessor1::invoke (62 bytes)
 945    b  3       java.lang.invoke.LambdaForm$DMH/0x00000008000e3c00::invokeStatic (20 bytes)
 946    b  3       jdk.test.lib.Asserts::assertEquals (42 bytes)        
 947    b  4       compiler.c2.irTests.TestPostParseCallDevirtualization::testMethodHandleCallWithCCP (50 bytes)
`
here compile id 945 be called.
but the info without c1 is:

`
254     n       java.lang.invoke.MethodHandle::invokeBasic()I (native)   
255    b        java.lang.invoke.MethodHandleImpl::isCompileConstant (2 bytes)
256    b        compiler.c2.irTests.TestPostParseCallDevirtualization::method2 (3 bytes)
257    b        compiler.c2.irTests.TestPostParseCallDevirtualization::testMethodHandleCallWithCCP (50 bytes)
`
the compile id 254 be called

-------------

PR: https://git.openjdk.java.net/jdk/pull/5903