commit 5a5d5548f0e69b9dd70285d65c62766958b390b6
author Kostya Serebryany <kcc@google.com> Wed Aug 17 23:09:57 2016 +0000
committer Kostya Serebryany <kcc@google.com> Wed Aug 17 23:09:57 2016 +0000
tree fbd9826d9df287e13d190fedc5168394904d68d2
parent d5ca720209be60a632086d61923d513d6d16c9b5

[libFuzzer] force proper popcnt instruction

llvm-svn: 279002

llvm/lib/Fuzzer/FuzzerTraceState.cpp

diff --git a/llvm/lib/Fuzzer/FuzzerTraceState.cpp b/llvm/lib/Fuzzer/FuzzerTraceState.cpp
index 9eae068..963480e 100644
--- a/llvm/lib/Fuzzer/FuzzerTraceState.cpp
+++ b/llvm/lib/Fuzzer/FuzzerTraceState.cpp
@@ -574,6 +574,7 @@
   VP.AddValue((PC & 4095) | (LastSameByte << 12));
 }
 
+__attribute__((target("popcnt")))
 static void AddValueForCmp(uintptr_t PC, uint64_t Arg1, uint64_t Arg2) {
   VP.AddValue((PC & 4095) | (__builtin_popcountl(Arg1 ^ Arg2) << 12));
 }