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* [llvm-exegesis][NFC] Remove extra `llvm::` qualifications.Clement Courbet2019-10-091-17/+15
| | | | | | | | | | | | Summary: First patch: in unit tests. Subscribers: nemanjai, tschuett, MaskRay, jsji, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D68687 llvm-svn: 374157
* [llvm-exegesis] Add loop mode for repeating the snippet.Clement Courbet2019-09-271-7/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Summary: Before this change the Executable function was made by duplicating the snippet. This change adds a --repetion-mode={loop|duplicate} flag that allows choosing between this behaviour and wrapping the snippet instructions in a loop. The new mode can help measurements when the snippet fits in the DSB by short-cirtcuiting decoding. The loop adds a dec + jmp to the measurements, but since these are not part of the critical path, they execute in parallel with the measured code and do not impact measurements in practice. Overview of the change: - New SnippetRepetitor abstraction that handles repeating the snippet. The assembler delegates repeating the instructions to this class. - ExegesisTarget learns how to decrement loop counter and jump. - Some refactoring of the assembler into FunctionFiller/BasicBlockFiller. Reviewers: gchatelet Subscribers: mgorny, tschuett, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D68125 llvm-svn: 373083
* Update the file headers across all of the LLVM projects in the monorepoChandler Carruth2019-01-191-4/+3
| | | | | | | | | | | | | | | | | to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
* [llvm-exegesis] Move namespace exegesis inside llvm::Fangrui Song2018-10-221-0/+2
| | | | | | | | | | | | | | | | Summary: This allows simplifying references of llvm::foo with foo when the needs come in the future. Reviewers: courbet, gchatelet Reviewed By: gchatelet Subscribers: javed.absar, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D53455 llvm-svn: 344922
* [llvm-exegesis] Improve Register Setup (roll forward of D51856).Guillaume Chatelet2018-09-201-11/+12
| | | | | | | | | | | | | | Summary: Added function to set a register to a particular value + tests. Add EFLAGS test, use new setRegTo instead of setRegToConstant. Reviewers: courbet, javed.absar Subscribers: llvm-commits, tschuett, mgorny Differential Revision: https://reviews.llvm.org/D52297 llvm-svn: 342644
* Revert rL342466: [llvm-exegesis] Improve Register Setup.Simon Pilgrim2018-09-181-12/+11
| | | | | | | | | | | | | | | | rL342465 is breaking the MSVC buildbots, but I need to revert this dependent revision as well. Summary: Added function to set a register to a particular value + tests. Add EFLAGS test, use new setRegTo instead of setRegToConstant. Reviewers: courbet, javed.absar Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D51856 llvm-svn: 342489
* [llvm-exegesis] Improve Register Setup.Guillaume Chatelet2018-09-181-11/+12
| | | | | | | | | | | | | | Summary: Added function to set a register to a particular value + tests. Add EFLAGS test, use new setRegTo instead of setRegToConstant. Reviewers: courbet, javed.absar Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D51856 llvm-svn: 342466
* Add header guards to some headers that are missing themArgyrios Kyrtzidis2018-09-031-0/+5
| | | | | | | Also adjust some of dsymutil's headers to put the header guards at the top, otherwise the compiler will not recognize them as header guards. llvm-svn: 341323
* [llvm-exegesis] Provide a way to handle memory instructions.Guillaume Chatelet2018-08-011-10/+10
| | | | | | | | | | | | | | | | | Summary: And implement memory instructions on X86. This fixes PR36906. Reviewers: gchatelet Reviewed By: gchatelet Subscribers: lebedev.ri, filcab, mgorny, tschuett, RKSimon, llvm-commits Differential Revision: https://reviews.llvm.org/D48935 llvm-svn: 338567
* [llvm-exegesis] Get the BenchmarkRunner from the ExegesisTarget.Clement Courbet2018-06-261-3/+4
| | | | | | | | | | | | | | | Summary: This allows targets to override code generation for some instructions. As an example of override, this also moves ad-hoc instruction filtering for X86 into the X86 ExegesisTarget. Reviewers: gchatelet Subscribers: mgorny, tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D48587 llvm-svn: 335582
* [llvm-exegesis] Generate snippet setup code.Clement Courbet2018-06-251-5/+15
| | | | | | | | | | | | | | | Summary: This ensures that the snippet always sees the same values for registers, making measurements reproducible. This will also allow exploring different values. Reviewers: gchatelet Subscribers: tschuett, llvm-commits Differential Revision: https://reviews.llvm.org/D48542 llvm-svn: 335465
* [llvm-exegesis][NFC] Remove dead function.Clement Courbet2018-05-171-5/+0
| | | | llvm-svn: 332597
* reland r332579: [llvm-exegesis] Update to cover latency through another opcode.Clement Courbet2018-05-171-0/+81
Restructuring the code to measure latency and uops. The end goal is to have this program spawn another process to deal with SIGILL and other malformed programs. It is not yet the case in this redesign, it is still the main program that runs the code (and may crash). It now uses BitVector instead of Graph for performance reasons. https://reviews.llvm.org/D46821 (with fixed ARM tests) Authored by Guillaume Chatelet llvm-svn: 332592
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