8320682: [AArch64] C1 compilation fails with "Field too big for insn"

Reviewed-by: thartmann, aph, dlong

Author: dlunde

src/hotspot/share/c1/c1_globals.hpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -275,9 +275,11 @@
   develop(bool, InstallMethods, true,                                       \
           "Install methods at the end of successful compilations")          \
                                                                             \
+  /* The compiler assumes, in many places, that methods are at most 1MB. */ \
+  /* Therefore, we restrict this flag to at most 1MB.                    */ \
   develop(intx, NMethodSizeLimit, (64*K)*wordSize,                          \
           "Maximum size of a compiled method.")                             \
-          range(0, max_jint)                                                \
+          range(0, 1*M)                                                     \
                                                                             \
   develop(bool, TraceFPUStack, false,                                       \
           "Trace emulation of the FPU stack (intel only)")                  \

test/hotspot/jtreg/compiler/arguments/TestC1Globals.java

@@ -21,33 +21,13 @@
  * questions.
  */
 
-/**
- * @test
- * @bug 8318817
- * @requires vm.debug
- * @summary Test flag with large value
- *
- * @run main/othervm -XX:NMethodSizeLimit=351658240
- *                   compiler.arguments.TestC1Globals
- */
-
-/**
- * @test
- * @bug 8318817
- * @requires vm.debug
- * @summary Test flag with large value
- *
- * @run main/othervm -XX:NMethodSizeLimit=224001703
- *                   compiler.arguments.TestC1Globals
- */
-
 /**
  * @test
  * @bug 8316653
  * @requires vm.debug
- * @summary Test flag with max value
+ * @summary Test flag with max value.
  *
- * @run main/othervm -XX:NMethodSizeLimit=2147483647
+ * @run main/othervm -XX:NMethodSizeLimit=1M
  *                   compiler.arguments.TestC1Globals
  */
 
@@ -56,25 +36,23 @@
  * @bug 8318817
  * @requires vm.debug
  * @requires os.family == "linux"
- * @summary Test flag with large value combined with transparent huge pages on
+ * @summary Test flag with max value combined with transparent huge pages on
  *          Linux.
  *
- * @run main/othervm -XX:NMethodSizeLimit=351658240
+ * @run main/othervm -XX:NMethodSizeLimit=1M
  *                   -XX:+UseTransparentHugePages
  *                   compiler.arguments.TestC1Globals
- *
  */
 
 /**
  * @test
- * @bug 8318817
+ * @bug 8320682
  * @requires vm.debug
- * @requires os.family == "linux"
- * @summary Test flag with large value combined with transparent huge pages on
- *          Linux.
+ * @summary Test flag with max value and specific compilation.
  *
- * @run main/othervm -XX:NMethodSizeLimit=224001703
- *                   -XX:+UseTransparentHugePages
+ * @run main/othervm -XX:NMethodSizeLimit=1M
+ *                   -XX:CompileOnly=java.util.HashMap::putMapEntries
+ *                   -Xcomp
  *                   compiler.arguments.TestC1Globals
  *
  */