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* Move all sources from the llvm project into contrib/llvm-project.Dimitry Andric2019-12-201-853/+0
| | | | | | | | | | | | | This uses the new layout of the upstream repository, which was recently migrated to GitHub, and converted into a "monorepo". That is, most of the earlier separate sub-projects with their own branches and tags were consolidated into one top-level directory, and are now branched and tagged together. Updating the vendor area to match this layout is next. Notes: svn path=/head/; revision=355940
* Merge llvm trunk r366426, resolve conflicts, and update FREEBSD-Xlist.Dimitry Andric2019-08-211-209/+8
| | | | Notes: svn path=/projects/clang900-import/; revision=351344
* Merge llvm trunk r338150, and resolve conflicts.Dimitry Andric2018-07-301-9/+26
| | | | Notes: svn path=/projects/clang700-import/; revision=336916
* Recommit r332501, with an additional upstream fix for "Cannot lowerDimitry Andric2018-04-201-5/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | EFLAGS copy that lives out of a basic block!" errors on i386. Pull in r325446 from upstream clang trunk (by me): [X86] Add 'sahf' CPU feature to frontend Summary: Make clang accept `-msahf` (and `-mno-sahf`) flags to activate the `+sahf` feature for the backend, for bug 36028 (Incorrect use of pushf/popf enables/disables interrupts on amd64 kernels). This was originally submitted in bug 36037 by Jonathan Looney <jonlooney@gmail.com>. As described there, GCC also uses `-msahf` for this feature, and the backend already recognizes the `+sahf` feature. All that is needed is to teach clang to pass this on to the backend. The mapping of feature support onto CPUs may not be complete; rather, it was chosen to match LLVM's idea of which CPUs support this feature (see lib/Target/X86/X86.td). I also updated the affected test case (CodeGen/attr-target-x86.c) to match the emitted output. Reviewers: craig.topper, coby, efriedma, rsmith Reviewed By: craig.topper Subscribers: emaste, cfe-commits Differential Revision: https://reviews.llvm.org/D43394 Pull in r328944 from upstream llvm trunk (by Chandler Carruth): [x86] Expose more of the condition conversion routines in the public API for X86's instruction information. I've now got a second patch under review that needs these same APIs. This bit is nicely orthogonal and obvious, so landing it. NFC. Pull in r329414 from upstream llvm trunk (by Craig Topper): [X86] Merge itineraries for CLC, CMC, and STC. These are very simple flag setting instructions that appear to only be a single uop. They're unlikely to need this separation. Pull in r329657 from upstream llvm trunk (by Chandler Carruth): [x86] Introduce a pass to begin more systematically fixing PR36028 and similar issues. The key idea is to lower COPY nodes populating EFLAGS by scanning the uses of EFLAGS and introducing dedicated code to preserve the necessary state in a GPR. In the vast majority of cases, these uses are cmovCC and jCC instructions. For such cases, we can very easily save and restore the necessary information by simply inserting a setCC into a GPR where the original flags are live, and then testing that GPR directly to feed the cmov or conditional branch. However, things are a bit more tricky if arithmetic is using the flags. This patch handles the vast majority of cases that seem to come up in practice: adc, adcx, adox, rcl, and rcr; all without taking advantage of partially preserved EFLAGS as LLVM doesn't currently model that at all. There are a large number of operations that techinaclly observe EFLAGS currently but shouldn't in this case -- they typically are using DF. Currently, they will not be handled by this approach. However, I have never seen this issue come up in practice. It is already pretty rare to have these patterns come up in practical code with LLVM. I had to resort to writing MIR tests to cover most of the logic in this pass already. I suspect even with its current amount of coverage of arithmetic users of EFLAGS it will be a significant improvement over the current use of pushf/popf. It will also produce substantially faster code in most of the common patterns. This patch also removes all of the old lowering for EFLAGS copies, and the hack that forced us to use a frame pointer when EFLAGS copies were found anywhere in a function so that the dynamic stack adjustment wasn't a problem. None of this is needed as we now lower all of these copies directly in MI and without require stack adjustments. Lots of thanks to Reid who came up with several aspects of this approach, and Craig who helped me work out a couple of things tripping me up while working on this. Differential Revision: https://reviews.llvm.org/D45146 Pull in r329673 from upstream llvm trunk (by Chandler Carruth): [x86] Model the direction flag (DF) separately from the rest of EFLAGS. This cleans up a number of operations that only claimed te use EFLAGS due to using DF. But no instructions which we think of us setting EFLAGS actually modify DF (other than things like popf) and so this needlessly creates uses of EFLAGS that aren't really there. In fact, DF is so restrictive it is pretty easy to model. Only STD, CLD, and the whole-flags writes (WRFLAGS and POPF) need to model this. I've also somewhat cleaned up some of the flag management instruction definitions to be in the correct .td file. Adding this extra register also uncovered a failure to use the correct datatype to hold X86 registers, and I've corrected that as necessary here. Differential Revision: https://reviews.llvm.org/D45154 Pull in r330264 from upstream llvm trunk (by Chandler Carruth): [x86] Fix PR37100 by teaching the EFLAGS copy lowering to rewrite uses across basic blocks in the limited cases where it is very straight forward to do so. This will also be useful for other places where we do some limited EFLAGS propagation across CFG edges and need to handle copy rewrites afterward. I think this is rapidly approaching the maximum we can and should be doing here. Everything else begins to require either heroic analysis to prove how to do PHI insertion manually, or somehow managing arbitrary PHI-ing of EFLAGS with general PHI insertion. Neither of these seem at all promising so if those cases come up, we'll almost certainly need to rewrite the parts of LLVM that produce those patterns. We do now require dominator trees in order to reliably diagnose patterns that would require PHI nodes. This is a bit unfortunate but it seems better than the completely mysterious crash we would get otherwise. Differential Revision: https://reviews.llvm.org/D45673 Together, these should ensure clang does not use pushf/popf sequences to save and restore flags, avoiding problems with unrelated flags (such as the interrupt flag) being restored unexpectedly. Requested by: jtl PR: 225330 MFC after: 1 week Notes: svn path=/head/; revision=332833
* Revert r332501 for now, as it can cause build failures on i386.Dimitry Andric2018-04-141-2/+5
| | | | | | | | | | Reported upstream as <https://bugs.llvm.org/show_bug.cgi?id=37133>. Reported by: emaste, ci.freebsd.org PR: 225330 Notes: svn path=/head/; revision=332503
* Pull in r325446 from upstream clang trunk (by me):Dimitry Andric2018-04-141-5/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [X86] Add 'sahf' CPU feature to frontend Summary: Make clang accept `-msahf` (and `-mno-sahf`) flags to activate the `+sahf` feature for the backend, for bug 36028 (Incorrect use of pushf/popf enables/disables interrupts on amd64 kernels). This was originally submitted in bug 36037 by Jonathan Looney <jonlooney@gmail.com>. As described there, GCC also uses `-msahf` for this feature, and the backend already recognizes the `+sahf` feature. All that is needed is to teach clang to pass this on to the backend. The mapping of feature support onto CPUs may not be complete; rather, it was chosen to match LLVM's idea of which CPUs support this feature (see lib/Target/X86/X86.td). I also updated the affected test case (CodeGen/attr-target-x86.c) to match the emitted output. Reviewers: craig.topper, coby, efriedma, rsmith Reviewed By: craig.topper Subscribers: emaste, cfe-commits Differential Revision: https://reviews.llvm.org/D43394 Pull in r328944 from upstream llvm trunk (by Chandler Carruth): [x86] Expose more of the condition conversion routines in the public API for X86's instruction information. I've now got a second patch under review that needs these same APIs. This bit is nicely orthogonal and obvious, so landing it. NFC. Pull in r329414 from upstream llvm trunk (by Craig Topper): [X86] Merge itineraries for CLC, CMC, and STC. These are very simple flag setting instructions that appear to only be a single uop. They're unlikely to need this separation. Pull in r329657 from upstream llvm trunk (by Chandler Carruth): [x86] Introduce a pass to begin more systematically fixing PR36028 and similar issues. The key idea is to lower COPY nodes populating EFLAGS by scanning the uses of EFLAGS and introducing dedicated code to preserve the necessary state in a GPR. In the vast majority of cases, these uses are cmovCC and jCC instructions. For such cases, we can very easily save and restore the necessary information by simply inserting a setCC into a GPR where the original flags are live, and then testing that GPR directly to feed the cmov or conditional branch. However, things are a bit more tricky if arithmetic is using the flags. This patch handles the vast majority of cases that seem to come up in practice: adc, adcx, adox, rcl, and rcr; all without taking advantage of partially preserved EFLAGS as LLVM doesn't currently model that at all. There are a large number of operations that techinaclly observe EFLAGS currently but shouldn't in this case -- they typically are using DF. Currently, they will not be handled by this approach. However, I have never seen this issue come up in practice. It is already pretty rare to have these patterns come up in practical code with LLVM. I had to resort to writing MIR tests to cover most of the logic in this pass already. I suspect even with its current amount of coverage of arithmetic users of EFLAGS it will be a significant improvement over the current use of pushf/popf. It will also produce substantially faster code in most of the common patterns. This patch also removes all of the old lowering for EFLAGS copies, and the hack that forced us to use a frame pointer when EFLAGS copies were found anywhere in a function so that the dynamic stack adjustment wasn't a problem. None of this is needed as we now lower all of these copies directly in MI and without require stack adjustments. Lots of thanks to Reid who came up with several aspects of this approach, and Craig who helped me work out a couple of things tripping me up while working on this. Differential Revision: https://reviews.llvm.org/D45146 Pull in r329673 from upstream llvm trunk (by Chandler Carruth): [x86] Model the direction flag (DF) separately from the rest of EFLAGS. This cleans up a number of operations that only claimed te use EFLAGS due to using DF. But no instructions which we think of us setting EFLAGS actually modify DF (other than things like popf) and so this needlessly creates uses of EFLAGS that aren't really there. In fact, DF is so restrictive it is pretty easy to model. Only STD, CLD, and the whole-flags writes (WRFLAGS and POPF) need to model this. I've also somewhat cleaned up some of the flag management instruction definitions to be in the correct .td file. Adding this extra register also uncovered a failure to use the correct datatype to hold X86 registers, and I've corrected that as necessary here. Differential Revision: https://reviews.llvm.org/D45154 Together, these should ensure clang does not use pushf/popf sequences to save and restore flags, avoiding problems with unrelated flags (such as the interrupt flag) being restored unexpectedly. Requested by: jtl PR: 225330 MFC after: 1 week Notes: svn path=/head/; revision=332501
* Merge llvm trunk r321017 to contrib/llvm.Dimitry Andric2017-12-201-103/+31
| | | | Notes: svn path=/projects/clang600-import/; revision=327023
* Merge llvm, clang, lld, lldb, compiler-rt and libc++ r305145, and updateDimitry Andric2017-06-101-1/+1
| | | | | | | build glue. Notes: svn path=/projects/clang500-import/; revision=319799
* Merge llvm trunk r300422 and resolve conflicts.Dimitry Andric2017-04-161-65/+94
| | | | Notes: svn path=/projects/clang500-import/; revision=317029
* Update llvm to trunk r290819 and resolve conflicts.Dimitry Andric2017-01-021-7/+17
| | | | Notes: svn path=/projects/clang400-import/; revision=311142
* Update llvm to release_39 branch r276489, and resolve conflicts.Dimitry Andric2016-08-161-22/+86
| | | | Notes: svn path=/projects/clang390-import/; revision=304240
* Update llvm to trunk r256633.Dimitry Andric2015-12-301-0/+7
| | | | Notes: svn path=/projects/clang380-import/; revision=292941
* Update llvm/clang to r241361.Dimitry Andric2015-07-051-2/+8
| | | | Notes: svn path=/projects/clang-trunk/; revision=285181
* Update llvm/clang to r240225.Dimitry Andric2015-06-231-1/+1
| | | | Notes: svn path=/projects/clang-trunk/; revision=284734
* Update Makefiles and other build glue for llvm/clang 3.7.0, as of trunkDimitry Andric2015-06-101-0/+3
| | | | | | | r239412. Notes: svn path=/projects/clang-trunk/; revision=284236
* Merge llvm trunk r238337 from ^/vendor/llvm/dist, resolve conflicts, andDimitry Andric2015-05-271-85/+219
| | | | | | | preserve our customizations, where necessary. Notes: svn path=/projects/clang-trunk/; revision=283631
* Merge llvm 3.6.0rc1 from ^/vendor/llvm/dist, merge clang 3.6.0rc1 fromDimitry Andric2015-01-251-84/+127
| | | | | | | ^/vendor/clang/dist, resolve conflicts, and cleanup patches. Notes: svn path=/projects/clang360-import/; revision=277718
* Merge llvm 3.5.0 release from ^/vendor/llvm/dist, resolve conflicts, andDimitry Andric2014-11-241-60/+147
| | | | | | | preserve our customizations, where necessary. Notes: svn path=/projects/clang350-import/; revision=274968
* Upgrade our copy of llvm/clang to 3.4 release. This version supportsDimitry Andric2014-02-161-115/+30
| | | | | | | | | | | | | | | | | | | | all of the features in the current working draft of the upcoming C++ standard, provisionally named C++1y. The code generator's performance is greatly increased, and the loop auto-vectorizer is now enabled at -Os and -O2 in addition to -O3. The PowerPC backend has made several major improvements to code generation quality and compile time, and the X86, SPARC, ARM32, Aarch64 and SystemZ backends have all seen major feature work. Release notes for llvm and clang can be found here: <http://llvm.org/releases/3.4/docs/ReleaseNotes.html> <http://llvm.org/releases/3.4/tools/clang/docs/ReleaseNotes.html> MFC after: 1 month Notes: svn path=/head/; revision=261991
* Upgrade our copy of llvm/clang to trunk r178860, in preparation of theDimitry Andric2013-04-121-8/+1
| | | | | | | | | | | | upcoming 3.3 release (branching and freezing expected in a few weeks). Preliminary release notes can be found at the usual location: <http://llvm.org/docs/ReleaseNotes.html> An MFC is planned once the actual 3.3 release is finished. Notes: svn path=/head/; revision=249423
* Upgrade our copy of llvm/clang to r168974, from upstream's release_32Dimitry Andric2012-12-031-5/+7
| | | | | | | | branch. This is effectively llvm/clang 3.2 RC2; the 3.2 release is coming soon. Notes: svn path=/head/; revision=243830
* Upgrade our copy of llvm/clang to trunk r162107. With thanks toDimitry Andric2012-08-201-16/+51
| | | | | | | Benjamin Kramer and Joerg Sonnenberger for their input and fixes. Notes: svn path=/head/; revision=239462
* Upgrade our copy of llvm/clang to trunk r154661, in preparation of theDimitry Andric2012-04-161-29/+206
| | | | | | | | | | upcoming 3.1 release (expected in a few weeks). Preliminary release notes can be found at: <http://llvm.org/docs/ReleaseNotes.html> MFC after: 2 weeks Notes: svn path=/head/; revision=234353
* Upgrade our copy of llvm/clang to r142614, from upstream's release_30Dimitry Andric2011-10-221-15/+62
| | | | | | | | | | branch. This brings us very close to the 3.0 release, which is expected in a week or two. MFC after: 1 week Notes: svn path=/head/; revision=226633
* Upgrade our copy of llvm/clang to r135360, from upstream's trunk.Dimitry Andric2011-07-171-1/+2
| | | | Notes: svn path=/head/; revision=224145
* Upgrade our copy of llvm/clang to r130700, from upstream's trunk.Dimitry Andric2011-05-021-0/+5
| | | | Notes: svn path=/head/; revision=221345
* Update llvm/clang to trunk r126547.Dimitry Andric2011-02-271-4/+4
| | | | | | | | | | | | | | | | | There are several bugfixes in this update, but the most important one is to ensure __start_ and __stop_ symbols for linker sets and kernel module metadata are always emitted in object files: http://llvm.org/bugs/show_bug.cgi?id=9292 Before this fix, if you compiled kernel modules with clang, they would not be properly processed by kldxref, and if they had any dependencies, the kernel would fail to load those. Another problem occurred when attempting to mount a tmpfs filesystem, which would result in 'operation not supported by device'. Notes: svn path=/head/; revision=219077
* Upgrade our copy of llvm/clang to r126079, from upstream's trunk.Dimitry Andric2011-02-201-9/+6
| | | | | | | | This contains many improvements, primarily better C++ support, an integrated assembler for x86 and support for -pg. Notes: svn path=/head/; revision=218893
* Upgrade our Clang in base to r108428.Ed Schouten2010-07-201-12/+3
| | | | | | | | | | | | This commit merges the latest LLVM sources from the vendor space. It also updates the build glue to match the new sources. Clang's version number is changed to match LLVM's, which means /usr/include/clang/2.0 has been renamed to /usr/include/clang/2.8. Obtained from: projects/clangbsd Notes: svn path=/head/; revision=210299
* Import LLVM/clang from vendor stripped of docs/ test/ website/ www/ examples/Roman Divacky2010-06-091-0/+566
in llvm/ and/or llvm/contrib/clang/ respectively. Approved by: ed (mentor) Approved by: core Notes: svn path=/head/; revision=208954
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