gdb>call p->dump(2)
 110        Proj        ===  105  [[ 147 ]] #5  Oop:java/lang/String:exact * !jvms: String::substring @ bci:6 Hello::foo @ bci:2
 113        CatchProj   ===  112  [[ 185  147 ]] #0@bci -1  !orig=[140] !jvms: String::substring @ bci:6 Hello::foo @ bci:2
 58       ConL  ===  0  [[ 60  178 ]]  #long:20
 147      CastPP        ===  113  110  [[ 270  213  213  178  178 ]]  #java/lang/String:NotNull:exact *  Oop:java/lang/String:NotNull:exact * !jvms: Hello::foo @ bci:9
 178    AddP    === _  147  147  58  [[ 179 ]]   Oop:java/lang/String:NotNull:exact+20 * [narrow] !jvms: String::length @ bci:1 String::startsWith @ bci:6 String::startsWith @ bci:3 Hello::foo @ bci:9

gdb>call p->dump(-2)
 178    AddP    === _  147  147  58  [[ 179 ]]   Oop:java/lang/String:NotNull:exact+20 * [narrow] !jvms: String::length @ bci:1 String::startsWith @ bci:6 String::startsWith @ bci:3 Hello::foo @ bci:9
 179      LoadN === _  119  178  [[ 180 ]]  @java/lang/String:exact+20 * [narrow], name=value, idx=4; #narrowoop: byte[int:>=0]:exact * !jvms: String::length @ bci:1 String::startsWith @ bci:6 String::startsWith @ bci:3 Hello::foo @ bci:9
 180        DecodeN     === _  179  [[ 193  181  360  386  373  331 ]]  #byte[int:>=0]:exact * !jvms: String::length @ bci:1 String::startsWith @ bci:6 String::startsWith @ bci:3 Hello::foo @ bci:9