[PATCH] D15547: [PGO] Handle and report overflow during profile merge for all types of data

[David Li via llvm-commits]

davidxl added inline comments.

================
Comment at: include/llvm/ProfileData/InstrProf.h:187
@@ -186,1 +186,3 @@
 
+inline instrprof_error AccumulateResult(instrprof_error &Accumulator,
+                                        instrprof_error Result) {
----------------
Nit: how about UpdateResult -- it seems a better name.

================
Comment at: include/llvm/ProfileData/SampleProf.h:145
@@ -134,2 +144,3 @@
       S = SaturatingMultiply(S, Weight, &Overflowed);
-      assert(!Overflowed && "Sample counter overflowed!");
+      if (Overflowed)
+        return sampleprof_error::counter_overflow;
----------------
There are also lots of if(..) return patterns that can be simplified. This case you will need a macro:

#define RETURN_IF(Cond, Err) \
    if(Cond) \
        return Err;


http://reviews.llvm.org/D15547