JVM crashes with "unexpected index type" assert in LIRGenerator::do_UnsafeGetRaw

Test compiler/uncommontrap/StackOverflowGuardPagesOff.java crashes with following assert on solaris-sparc w/ "-Xcomp -XX:+DeoptimizeALot" flags:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/HUDSON/workspace/8-2-build-solaris-sparcv9/jdk8u40/1614/hotspot/src/share/vm/c1/c1_LIRGenerator.cpp:2111), pid=12766, tid=10
# assert(!x->has_index() || (index_op->type() == T_INT && index_op->is_constant()) || (index_op->type() == T_LONG && !index_op->is_constant())) failed: unexpected index type
#
# JRE version: Java(TM) SE Runtime Environment (8.0_40-b08) (build 1.8.0_40-ea-fastdebug-b08)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.40-b12-fastdebug compiled mode solaris-sparc )
# Core dump written. Default location: /export/local/aurora/sandbox/results/workDir/compiler/uncommontrap/StackOverflowGuardPagesOff/core or core.12766
#
# If you would like to submit a bug report, please visit:
# http://bugreport.sun.com/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x000000010049e800): JavaThread "C1 CompilerThread3" daemon [_thread_in_native, id=10, stack(0xffffffff7ae00000,0xffffffff7af00000)]

Stack: [0xffffffff7ae00000,0xffffffff7af00000], sp=0xffffffff7aefe300, free space=1016k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x12e4fb8] void VMError::report_and_die()+0x588
V [libjvm.so+0x762720] void report_vm_error(const char*,int,const char*,const char*)+0x78
V [libjvm.so+0x4d29f8] void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw*)+0x418
V [libjvm.so+0x4c46f4] void LIRGenerator::block_do(BlockBegin*)+0x144
V [libjvm.so+0x483c6c] void BlockList::iterate_forward(BlockClosure*)+0x94
V [libjvm.so+0x436048] void Compilation::emit_lir()+0x468
V [libjvm.so+0x436e60] int Compilation::compile_java_method()+0x5b8
V [libjvm.so+0x4372f8] void Compilation::compile_method()+0xb0
V [libjvm.so+0x437e94] Compilation::Compilation(AbstractCompiler*,ciEnv*,ciMethod*,int,BufferBlob*)+0x2ec
V [libjvm.so+0x43adcc] void Compiler::compile_method(ciEnv*,ciMethod*,int)+0x12c
V [libjvm.so+0x6d1e84] void CompileBroker::invoke_compiler_on_method(CompileTask*)+0x594
V [libjvm.so+0x6d12dc] void CompileBroker::compiler_thread_loop()+0x4cc
V [libjvm.so+0x1226ed8] void JavaThread::thread_main_inner()+0x268
V [libjvm.so+0x1226bf0] void JavaThread::run()+0x408
V [libjvm.so+0xf90100] java_start+0x258
C [libc.so.1+0xe25fc] _lwp_start+0x8


Current CompileTask:
C1: 5232 1447 % b 1 StackOverflowGuardPagesOff::m1 @ 12 (22 bytes)

Issue could be reproduced starting from 8u40b08.
I was not able to reproduce it with latest jdk 9 build.