From cb4830cc99e790e0a76e1a9b1414e4b7e6e06134 Mon Sep 17 00:00:00 2001 From: Aaron Ballman Date: Thu, 17 Jan 2013 20:04:28 +0000 Subject: [PATCH] Reverting back to the fallback instead of using the 64-bit popcnt instruction as it doesn't exist on all x64 CPU architectures. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172751 91177308-0d34-0410-b5e6-96231b3b80d8 --- include/llvm/Support/MathExtras.h | 2 -- 1 file changed, 2 deletions(-) diff --git a/include/llvm/Support/MathExtras.h b/include/llvm/Support/MathExtras.h index 340b7741b1b..190df1f05eb 100644 --- a/include/llvm/Support/MathExtras.h +++ b/include/llvm/Support/MathExtras.h @@ -315,8 +315,6 @@ inline unsigned CountPopulation_32(uint32_t Value) { inline unsigned CountPopulation_64(uint64_t Value) { #if __GNUC__ >= 4 return __builtin_popcountll(Value); -#elif defined(_MSC_VER) && defined(_M_X64) - return __popcnt64(Value); #else uint64_t v = Value - ((Value >> 1) & 0x5555555555555555ULL); v = (v & 0x3333333333333333ULL) + ((v >> 2) & 0x3333333333333333ULL); -- 2.34.1