Refactor addsf3.c and adddf3.c.

Differential Revision: http://reviews.llvm.org/D3885


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209740 91177308-0d34-0410-b5e6-96231b3b80d8
Refactor muldf3 and mulsf3.

Patch from: GuanHong Liu
Differential Revision: http://reviews.llvm.org/D3886


git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209741 91177308-0d34-0410-b5e6-96231b3b80d8
tsan: do not use 64-bit atomics in allocator code
64-bit atomics make porting of asan to 32-bits platforms problematic.



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@209744 91177308-0d34-0410-b5e6-96231b3b80d8