Revert "Compiler-rt part of D26230: Add (constant) masked load/store support (Try #2)"

This reverts commit r288504.

clang-bpf-build fails with no details:
******************** TEST 'AddressSanitizer-x86_64-linux ::
TestCases/masked-ops.cpp' FAILED ********************
Script:
--
/mnt/buildbot/slave-root/clang-bpf-build/stage1/./bin/clang --driver-mode=g++ -fsanitize=address -mno-omit-leaf-frame-pointer -fno-omit-frame-pointer -fno-optimize-sibling-calls -gline-tables-only -m64 -o /mnt/buildbot/slave-root/clang-bpf-build/stage1/projects/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/masked-ops.cpp.tmp /mnt/buildbot/slave-root/clang-bpf-build/llvm/projects/compiler-rt/test/asan/TestCases/masked-ops.cpp -mavx -O1
not /mnt/buildbot/slave-root/clang-bpf-build/stage1/projects/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/masked-ops.cpp.tmp l1 2>&1 | FileCheck -check-prefix=CHECK-L1 /mnt/buildbot/slave-root/clang-bpf-build/llvm/projects/compiler-rt/test/asan/TestCases/masked-ops.cpp
/mnt/buildbot/slave-root/clang-bpf-build/stage1/projects/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/masked-ops.cpp.tmp l6 2>&1 | FileCheck -check-prefix=CHECK-L6 /mnt/buildbot/slave-root/clang-bpf-build/llvm/projects/compiler-rt/test/asan/TestCases/masked-ops.cpp
/mnt/buildbot/slave-root/clang-bpf-build/stage1/projects/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/masked-ops.cpp.tmp la 2>&1 | FileCheck -check-prefix=CHECK-LA /mnt/buildbot/slave-root/clang-bpf-build/llvm/projects/compiler-rt/test/asan/TestCases/masked-ops.cpp
not /mnt/buildbot/slave-root/clang-bpf-build/stage1/projects/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/masked-ops.cpp.tmp s1 2>&1 | FileCheck -check-prefix=CHECK-S1 /mnt/buildbot/slave-root/clang-bpf-build/llvm/projects/compiler-rt/test/asan/TestCases/masked-ops.cpp
/mnt/buildbot/slave-root/clang-bpf-build/stage1/projects/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/masked-ops.cpp.tmp s6 2>&1 | FileCheck -check-prefix=CHECK-S6 /mnt/buildbot/slave-root/clang-bpf-build/llvm/projects/compiler-rt/test/asan/TestCases/masked-ops.cpp
/mnt/buildbot/slave-root/clang-bpf-build/stage1/projects/compiler-rt/test/asan/X86_64LinuxConfig/TestCases/Output/masked-ops.cpp.tmp sa 2>&1 | FileCheck -check-prefix=CHECK-SA /mnt/buildbot/slave-root/clang-bpf-build/llvm/projects/compiler-rt/test/asan/TestCases/masked-ops.cpp
--
Exit Code: 2

Command Output (stderr):
--
FileCheck error: '-' is empty.
FileCheck command line:  FileCheck -check-prefix=CHECK-L6 /mnt/buildbot/slave-root/clang-bpf-build/llvm/projects/compiler-rt/test/asan/TestCases/masked-ops.cpp

--

********************

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@288507 91177308-0d34-0410-b5e6-96231b3b80d8

Author: filcab