Have the jit capture the SuperPMI method index for use in correlating outputs from different runs.

Useful for matching SPMI outputs in cases where jit changes cause differential replay failures so lining up results side-by-side doesn't work.

If the jit is not hosted under SPMI, the index will report as zero.

[tfs-changeset: 1615278]

Author: AndyAyersMS

src/jit/compiler.cpp

@@ -6575,6 +6575,7 @@ void JitTimer::PrintCsvHeader()
         // Ex: ngen install mscorlib won't print stats for "ngen" but for "mscorsvw"
         FILE* fp = _wfopen(jitTimeLogCsv, W("w"));
         fprintf(fp, "\"Method Name\",");
+        fprintf(fp, "\"Method Index\",");
         fprintf(fp, "\"IL Bytes\",");
         fprintf(fp, "\"Basic Blocks\",");
         fprintf(fp, "\"Opt Level\",");
@@ -6590,6 +6591,8 @@ void JitTimer::PrintCsvHeader()
     }
 }
 
+extern ICorJitHost* g_jitHost;
+
 void JitTimer::PrintCsvMethodStats(Compiler* comp)
 {
     LPCWSTR jitTimeLogCsv = Compiler::JitTimeLogCsv();
@@ -6601,10 +6604,20 @@ void JitTimer::PrintCsvMethodStats(Compiler* comp)
     // eeGetMethodFullName uses locks, so don't enter crit sec before this call.
     const char* methName = comp->eeGetMethodFullName(comp->info.compMethodHnd);
 
+    // Try and access the SPMI index to report in the data set.
+    //
+    // If the jit is not hosted under SPMI this will return the
+    // default value of zero.
+    //
+    // Query the jit host directly here instead of going via the
+    // config cache, since value will change for each method.
+    int index = g_jitHost->getIntConfigValue(W("SuperPMIMethodContextNumber"), 0);
+
     CritSecHolder csvLock(s_csvLock);
 
     FILE* fp = _wfopen(jitTimeLogCsv, W("a"));
     fprintf(fp, "\"%s\",", methName);
+    fprintf(fp, "%d,", index);
     fprintf(fp, "%u,", comp->info.compILCodeSize);
     fprintf(fp, "%u,", comp->fgBBcount);
     fprintf(fp, "%u,", comp->opts.MinOpts());