[llvm] r290622 - [libFuzzer] fix UB and simplify the computation of the RNG seed (https://llvm.org/bugs/show_bug.cgi?id=31456)

[Kostya Serebryany via llvm-commits]

Author: kcc
Date: Tue Dec 27 13:51:34 2016
New Revision: 290622

URL: http://llvm.org/viewvc/llvm-project?rev=290622&view=rev
Log:
[libFuzzer] fix UB and simplify the computation of the RNG seed (https://llvm.org/bugs/show_bug.cgi?id=31456)

Modified:
    llvm/trunk/lib/Fuzzer/FuzzerDriver.cpp

Modified: llvm/trunk/lib/Fuzzer/FuzzerDriver.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Fuzzer/FuzzerDriver.cpp?rev=290622&r1=290621&r2=290622&view=diff
==============================================================================
--- llvm/trunk/lib/Fuzzer/FuzzerDriver.cpp (original)
+++ llvm/trunk/lib/Fuzzer/FuzzerDriver.cpp Tue Dec 27 13:51:34 2016
@@ -442,8 +442,8 @@ int FuzzerDriver(int *argc, char ***argv
   unsigned Seed = Flags.seed;
   // Initialize Seed.
   if (Seed == 0)
-    Seed = (std::chrono::system_clock::now().time_since_epoch().count() << 10) +
-           GetPid();
+    Seed =
+        std::chrono::system_clock::now().time_since_epoch().count() + GetPid();
   if (Flags.verbosity)
     Printf("INFO: Seed: %u\n", Seed);