[compiler-rt] r270483 - [profile] clean up runtime warnings.

[Xinliang David Li via llvm-commits]

Author: davidxl
Date: Mon May 23 15:08:58 2016
New Revision: 270483

URL: http://llvm.org/viewvc/llvm-project?rev=270483&view=rev
Log:
[profile] clean up runtime warnings.

 o make warning message more meaningful to users.
 o add suggestion to fix the problem
 o limit the max number of output.



Modified:
    compiler-rt/trunk/lib/profile/InstrProfilingValue.c

Modified: compiler-rt/trunk/lib/profile/InstrProfilingValue.c
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/InstrProfilingValue.c?rev=270483&r1=270482&r2=270483&view=diff
==============================================================================
--- compiler-rt/trunk/lib/profile/InstrProfilingValue.c (original)
+++ compiler-rt/trunk/lib/profile/InstrProfilingValue.c Mon May 23 15:08:58 2016
@@ -71,6 +71,8 @@ __llvm_get_function_addr(const __llvm_pr
  */
 
 static int hasStaticCounters = 1;
+static int OutOfNodesWarnings = 0;
+#define MAX_VP_WARNS 10
 
 static int allocateValueProfileCounters(__llvm_profile_data *Data) {
   uint64_t NumVSites = 0;
@@ -102,9 +104,11 @@ static ValueProfNode *allocateOneNode(__
     return (ValueProfNode *)calloc(1, sizeof(ValueProfNode));
 
   Node = COMPILER_RT_PTR_FETCH_ADD(ValueProfNode, CurrentVNode, 1);
-  if (Node >= EndVNode) {
-    PROF_WARN("Running out of nodes: site_%d at func_%" PRIu64
-              ", value=%" PRIu64 " \n", Index, Data->NameRef, Value);
+  if (Node >= EndVNode && (OutOfNodesWarnings ++ < MAX_VP_WARNS)) {
+    PROF_WARN("Unable to track new values: %s. "
+              " Consider using option -mllvm -vp-counters-per-site=<n> to allocate more" 
+              " value profile counters at compile time. \n", 
+              "Running out of static counters");
     return 0;
   }
   return Node;