Compress deoptimization information by sharing common suffixes.

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 8e476044c2dc655134bbf8d69da9e66fd40c735f..719e8b0c1647830d79ba304cd17c7c23732631ed 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -348,7 +348,8 @@ static void DisassembleCode(const Function& function, bool optimized) {
     Smi& reason = Smi::Handle();
     for (intptr_t i = 0; i < deopt_table_length; ++i) {
       DeoptTable::GetEntry(deopt_table, i, &offset, &info, &reason);
-      OS::Print("0x%"Px"  %s  (%s)\n",
+      OS::Print("%4"Pd": 0x%"Px"  %s  (%s)\n",

[Kevin Millikin (Google), 2012/10/05 14:31:55]

Here we print 'compressed' entries, sometimes terminated by a suffix.  I think
that's fine, but we could also choose to decompress them before printing.

[srdjan, 2012/10/08 16:37:58]

I think we need to do both, i.e., have a flag that decompresses deopt info.

+                i,
                 start + offset.Value(),
                 info.ToCString(),
                 DeoptReasonToText(reason.Value()));