hg: jdk9/hs-rt/hotspot: 8049441: PPC64: Don't use StubCodeMarks for zero-length stubs

[serguei.spitsyn at oracle.com]

Changeset: 4068d04de2d5
Author:    sspitsyn
Date:      2014-07-15 21:28 -0700
URL:       http://hg.openjdk.java.net/jdk9/hs-rt/hotspot/rev/4068d04de2d5

8049441: PPC64: Don't use StubCodeMarks for zero-length stubs
Summary: Remove StubCodeMark in generate_icache_flush, generate_verify_oop, generate_throw_exception
Reviewed-by: dcubed, sspitsyn
Contributed-by: volker.simonis at gmail.com

! src/cpu/ppc/vm/icache_ppc.cpp
! src/cpu/ppc/vm/stubGenerator_ppc.cpp