[Bug java/17187] New: Call to java.lang.Object constructor is redundant
mckinlay at redhat dot com
gcc-bugzilla@gcc.gnu.org
Wed Aug 25 15:45:00 GMT 2004
The constructor for java.lang.Object does nothing. Its probably a reasonable
assumption that it will always do nothing, so, we should change the compiler to
not generate calls to it when generating native code. This would save 1 call for
every "new" operation, and also improve the number of inlining opportunities
available to the compiler, as many constructor calls could now be fully inlined.
One way to do this might be to extend the java "builtins" mechanism to allow us
to turn other well known calls, not just Math.* calls, into inlined trees. If
we see a java.lang.Object() call, check_for_builtin() would just return an empty
statement tree.
--
Summary: Call to java.lang.Object constructor is redundant
Product: gcc
Version: 3.5.0
Status: UNCONFIRMED
Keywords: missed-optimization
Severity: enhancement
Priority: P2
Component: java
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: mckinlay at redhat dot com
CC: gcc-bugs at gcc dot gnu dot org,java-prs at gcc dot gnu
dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17187
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