# Failure analysis

On some aarch64 machines, the node limit in compiler/codegen/TestMatcherClone.java is too strict.

# Original description

The test added by JDK-8331295 reliably fails on my Graviton 3 instance. This is not a new failure, I can see it fails at 7d4c3fd0915cfa8b279f42494625ec6afda338af (JDK-8331295) as well, so it was there from the beginning.

% CONF=linux-aarch64-server-fastdebug make test TEST=compiler/codegen/TestMatcherClone.java

1) Method "public void compiler.codegen.TestMatcherClone.test()" - [Failed IR rules: 1]:
   * @IR rule 1: "@compiler.lib.ir_framework.IR(phase={MATCHING}, applyIfPlatformAnd={}, applyIfCPUFeatureOr={}, counts={"_#C#ADD_P_OF#_", "reg_imm", "<200"}, failOn={}, applyIfPlatform={}, applyIfPlatformOr={}, applyIfOr={}, applyIfCPUFeatureAnd={}, applyIf={}, applyIfCPUFeature={}, applyIfAnd={}, applyIfNot={})"
     > Phase "After matching":
       - counts: Graph contains wrong number of nodes:
         * Constraint 1: "(\d+(\s){2}(addP_reg_imm.*)+(\s){2}===.*.*)"
           - Failed comparison: [found] 350 < 200 [given]
             - Matched nodes (350):
               * 3506 addP_reg_imm === _ 0 3507 [[ 3502 3528 10313 10312 10311 ]] #24/0x0000000000000018rawptr:BotPTR
               * 3519 addP_reg_imm === _ 3507 3507 [[ 3518 ]] #16/0x0000000000000010rawptr:BotPTR