Update clang, llvm, lld, lldb, compiler-rt and libc++ to 4.0.0 release:

2017-04-02T17:24:58Z

MFC r309142 (by emaste): Add WITH_LLD_AS_LD build knob If set it installs LLD as /usr/bin/ld. LLD (as of version 3.9) is not capable of linking the world and kernel, but can self-host and link many substantial applications. GNU ld continues to be used for the world and kernel build, regardless of how this knob is set. It is on by default for arm64, and off for all other CPU architectures. Sponsored by: The FreeBSD Foundation MFC r310840: Reapply 310775, now it also builds correctly if lldb is disabled: Move llvm-objdump from CLANG_EXTRAS to installed by default We currently install three tools from binutils 2.17.50: as, ld, and objdump. Work is underway to migrate to a permissively-licensed tool-chain, with one goal being the retirement of binutils 2.17.50. LLVM's llvm-objdump is intended to be compatible with GNU objdump although it is currently missing some options and may have formatting differences. Enable it by default for testing and further investigation. It may later be changed to install as /usr/bin/objdump, it becomes a fully viable replacement. Reviewed by: emaste Differential Revision: https://reviews.freebsd.org/D8879 MFC r312855 (by emaste): Rename LLD_AS_LD to LLD_IS_LD, for consistency with CLANG_IS_CC Reported by: Dan McGregor MFC r313559 | glebius | 2017-02-10 18:34:48 +0100 (Fri, 10 Feb 2017) | 5 lines Don't check struct rtentry on FreeBSD, it is an internal kernel structure. On other systems it may be API structure for SIOCADDRT/SIOCDELRT. Reviewed by: emaste, dim MFC r314152 (by jkim): Remove an assembler flag, which is redundant since r309124. The upstream took care of it by introducing a macro NO_EXEC_STACK_DIRECTIVE. http://llvm.org/viewvc/llvm-project?rev=273500&view=rev Reviewed by: dim MFC r314564: Upgrade our copies of clang, llvm, lld, lldb, compiler-rt and libc++ to 4.0.0 (branches/release_40 296509). The release will follow soon. Please note that from 3.5.0 onwards, clang, llvm and lldb require C++11 support to build; see UPDATING for more information. Also note that as of 4.0.0, lld should be able to link the base system on amd64 and aarch64. See the WITH_LLD_IS_LLD setting in src.conf(5). Though please be aware that this is work in progress. Release notes for llvm, clang and lld will be available here: Thanks to Ed Maste, Jan Beich, Antoine Brodin and Eric Fiselier for their help. Relnotes: yes Exp-run: antoine PR: 215969, 216008 MFC r314708: For now, revert r287232 from upstream llvm trunk (by Daniil Fukalov): [SCEV] limit recursion depth of CompareSCEVComplexity Summary: CompareSCEVComplexity goes too deep (50+ on a quite a big unrolled loop) and runs almost infinite time. Added cache of "equal" SCEV pairs to earlier cutoff of further estimation. Recursion depth limit was also introduced as a parameter. Reviewers: sanjoy Subscribers: mzolotukhin, tstellarAMD, llvm-commits Differential Revision: https://reviews.llvm.org/D26389 This commit is the cause of excessive compile times on skein_block.c (and possibly other files) during kernel builds on amd64. We never saw the problematic behavior described in this upstream commit, so for now it is better to revert it. An upstream bug has been filed here: https://bugs.llvm.org/show_bug.cgi?id=32142 Reported by: mjg MFC r314795: Reapply r287232 from upstream llvm trunk (by Daniil Fukalov): [SCEV] limit recursion depth of CompareSCEVComplexity Summary: CompareSCEVComplexity goes too deep (50+ on a quite a big unrolled loop) and runs almost infinite time. Added cache of "equal" SCEV pairs to earlier cutoff of further estimation. Recursion depth limit was also introduced as a parameter. Reviewers: sanjoy Subscribers: mzolotukhin, tstellarAMD, llvm-commits Differential Revision: https://reviews.llvm.org/D26389 Pull in r296992 from upstream llvm trunk (by Sanjoy Das): [SCEV] Decrease the recursion threshold for CompareValueComplexity Fixes PR32142. r287232 accidentally increased the recursion threshold for CompareValueComplexity from 2 to 32. This change reverses that change by introducing a separate flag for CompareValueComplexity's threshold. The latter revision fixes the excessive compile times for skein_block.c. MFC r314907 | mmel | 2017-03-08 12:40:27 +0100 (Wed, 08 Mar 2017) | 7 lines Unbreak ARMv6 world. The new compiler_rt library imported with clang 4.0.0 have several fatal issues (non-functional __udivsi3 for example) with ARM specific instrict functions. As temporary workaround, until upstream solve these problems, disable all thumb[1][2] related feature. MFC r315016: Update clang, llvm, lld, lldb, compiler-rt and libc++ to 4.0.0 release. We were already very close to the last release candidate, so this is a pretty minor update. Relnotes: yes MFC r316005: Revert r314907, and pull in r298713 from upstream compiler-rt trunk (by Weiming Zhao): builtins: Select correct code fragments when compiling for Thumb1/Thum2/ARM ISA. Summary: Value of __ARM_ARCH_ISA_THUMB isn't based on the actual compilation mode (-mthumb, -marm), it reflect's capability of given CPU. Due to this: - use __tbumb__ and __thumb2__ insteand of __ARM_ARCH_ISA_THUMB - use '.thumb' directive consistently in all affected files - decorate all thumb functions using DEFINE_COMPILERRT_THUMB_FUNCTION() --------- Note: This patch doesn't fix broken Thumb1 variant of __udivsi3 ! Reviewers: weimingz, rengolin, compnerd Subscribers: aemerson, dim Differential Revision: https://reviews.llvm.org/D30938 Discussed with: mmel

Make armv6 hard float abi by default. Kill armv6hf.

2016-05-18T06:01:18Z

Allow CPUTYPE=soft to build the current soft-float abi libraries. Add UPDATING entry to announce this. Approved by: re@ (gjb)

MFH

2016-03-02T16:14:46Z

DIRDEPS_BUILD: Regenerate without local dependencies.

2016-02-24T17:20:11Z

These are no longer needed after the recent 'beforebuild: depend' changes and hooking DIRDEPS_BUILD into a subset of FAST_DEPEND which supports skipping 'make depend'. Sponsored by: EMC / Isilon Storage Division

MFH

2016-01-07T17:23:43Z

Switch GNU ld to be installed as ld.bfd and linked as ld

2016-01-07T00:15:02Z

We intend to replace GNU ld with LLVM's lld, and on the path to there we'll experiment with having lld installed or linked as /usr/bin/ld. Thus, make ld.bfd the primary install target for GNU ld, to later facilitate making the ld link optional. Reviewed by: davide, dim Differential Revision: https://reviews.freebsd.org/D4790

MFH r289384-r293170

2016-01-04T19:19:48Z

Install ld also as ld.bfd, for use with cc -fuse-ld=bfd

2015-12-23T14:31:26Z

PR: 205409 [exp-run] MFC after: 1 week Relnotes: Yes Sponsored by: The FreeBSD Foundation

META MODE: Don't create .meta files when symlinking sources into the obj directory.

2015-11-25T19:44:43Z

Tracking these leads to situations where meta mode will consider the file to be out of date if /bin/sh or /bin/ln are newer than the source file. There's no reason for meta mode to do this as make is already handling the rebuild dependency fine. Sponsored by: EMC / Isilon Storage Division

Fix ld not respecting --sysroot.

2015-11-24T00:49:29Z

ld(1) uses the /usr/libdata/ldscripts when linking. These scripts add in the default search paths of /lib and /usr/lib via 'SEARCH_DIR("DIR")'. These need to be prefixed by '=' so that the --sysroot flag is respected. This is not a problem with buildworld since the TOOLS_PREFIX is baked into the cross-ld. However it is a problem when trying to use ld(1) with --sysroot anywhere else as it ends up still reading /lib and /usr/lib despite --sysroot. The default --sysroot (TARGET_SYSTEM_ROOT) is '/' for /usr/bin/ld. I found this while building with META MODE with uses only --sysroot with /usr/bin/ld, and found that libraries that I had not built in its sysroot directory were leaking in. This didn't happen with ports binutils either. This would also impact external compiler support. Reviewed by: bapt, brooks MFC after: 2 weeks Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D4262

src-test/gnu/usr.bin/binutils, branch releng/11.2