Reapply r329859 (partially, by imp):

Do not include float interfaces when using libsa.

We don't support float in the boot loaders, so don't include
interfaces for float or double in systems headers

Reapply r329859 (partially, by imp):

Do not include float interfaces when using libsa.

We don't support float in the boot loaders, so don't include
interfaces for float or double in systems headers. In addition, take
the unusual step of spiking double and float to prevent any more
accidental seepage.

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Undo r230021 again, further shrinking the diff against upstream.

This revision worked around an endless recursion when compiling clzdi2.c
and ctzdi2.c with gcc, upstream landed a different workaroun

Undo r230021 again, further shrinking the diff against upstream.

This revision worked around an endless recursion when compiling clzdi2.c
and ctzdi2.c with gcc, upstream landed a different workaround for this
in https://reviews.llvm.org/rL324593, which is effective enough.

Noticed by: jrtc27

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Reapply r326600 (by imp):

Since this is contrib code, create an upstreamable version of my
change. Now on FreeBSD and NetBSD if _STANDALONE is defined, we
include the kernel version with alloances f

Reapply r326600 (by imp):

Since this is contrib code, create an upstreamable version of my
change. Now on FreeBSD and NetBSD if _STANDALONE is defined, we
include the kernel version with alloances for the quirky differences
between the two.

Sponsored by: Netflix

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Reapply r322168 (partially, by br):

o Replace __riscv__ with __riscv
o Replace __riscv64 with (__riscv && __riscv_xlen == 64)

This is required to support new GCC 7.1 compiler.
This is compatible wi

Reapply r322168 (partially, by br):

o Replace __riscv__ with __riscv
o Replace __riscv64 with (__riscv && __riscv_xlen == 64)

This is required to support new GCC 7.1 compiler.
This is compatible with current GCC 6.1 compiler.

RISC-V is extensible ISA and the idea here is to have built-in define
per each extension, so together with __riscv we will have some subset
of these as well (depending on -march string passed to compiler):

__riscv_compressed
__riscv_atomic
__riscv_mul
__riscv_div
__riscv_muldiv
__riscv_fdiv
__riscv_fsqrt
__riscv_float_abi_soft
__riscv_float_abi_single
__riscv_float_abi_double
__riscv_cmodel_medlow
__riscv_cmodel_medany
__riscv_cmodel_pic
__riscv_xlen

Reviewed by: ngie
Sponsored by: DARPA, AFRL

Differential Revision: https://reviews.freebsd.org/D11901

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Reapply r230021, r276851 and a few other commits to compiler-rt

Reapply r230021 (by ed):

Add a workaround to prevent endless recursion in compiler-rt.

SPARC and MIPS CPUs don't have special instru

Reapply r230021, r276851 and a few other commits to compiler-rt

Reapply r230021 (by ed):

Add a workaround to prevent endless recursion in compiler-rt.

SPARC and MIPS CPUs don't have special instructions to count
leading/trailing zeroes. The compiler-rt library provides fallback
rountines for these. The 64-bit routines, __clzdi2 and __ctzdi2, are
implemented as simple wrappers around the compiler built-in
__builtin_clz(), assuming these will expand to either 32-bit
CPU instructions or calls to __clzsi2 and __ctzsi2.

Unfortunately, our GCC 4.2 probably thinks that because the operand is
stored in a 64-bit register, it might just be a better idea to invoke
its 64-bit equivalent, simply resulting into endless recursion. Fix this
by defining __builtin_clz and __builtin_ctz to __clzsi2 and __ctzsi2
explicitly.

Reapply r276851:

Update compiler-rt to trunk r224034. This brings a number of new
builtins, and also the various sanitizers. Support for these will be
added in a later commit.

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Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
release/11.x llvmorg-11-init-20933-g3c1fca803bc.

Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
master 2e10b7a39b9, the last commit before the llvmorg-12-init tag, from
which release/11.x was branched.

Note that for now, I

Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
master 2e10b7a39b9, the last commit before the llvmorg-12-init tag, from
which release/11.x was branched.

Note that for now, I rolled back all our local changes to make merging
easier, and I will reapply the still-relevant ones after updating to
11.0.0-rc1.

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