Initial test for a mapper that doesn't make too many bindings #20
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Otherwise clang installs all of its tools into `bin/` while LLVM installs its tools into (LLVM_TOOLS_INSTALL_DIR). I could swear this used to work (and in fact the julia build system assumes it), but I can't pin down a specific commit that would have broken this, and julia has been relying on pre-compiled binaries for a while now (that don't use this setting), so it may have been broken for quite a while. Differential Revision: https://reviews.llvm.org/D88630 (cherry picked from commit 6104e14) (cherry picked from commit f252e17) (cherry picked from commit 9039ce8)
IIUC we can't emit `memcmp` between pointers in addressspaces, doing so will trigger an assertion since the signature of the memcmp will not match it's arguments (https://bugs.llvm.org/show_bug.cgi?id=48661). This PR disables the attempt to merge icmps, when the pointer is in an addressspace. Differential Revision: https://reviews.llvm.org/D94813 (cherry picked from commit 458b259) (cherry picked from commit aaf2d27)
(cherry picked from commit 5393efb)
Co-authored-by: Valentin Churavy <v.churavy@gmail.com> Co-authored-by: Julian P Samaroo <jpsamaroo@jpsamaroo.me> (cherry picked from commit a0defe0)
Follow-up on https://reviews.llvm.org/D118970 FP_XSTATE_MAGIC1 is only available on glibc 2.27 and upwards Differential Revision: https://reviews.llvm.org/D124770
We need to force the emission of the EH Frame section (currently done via SupportsCompactUnwindWithoutEHFrame in the MCObjectFileInfo for the target), since libunwind doesn't yet support dynamically registering compact unwind information at run-time. (cherry picked from commit 60e0418) (cherry picked from commit 6275013)
PrintIRInstrumentation::shouldPrintAfterPass accepts a pass ID instead of a pass name Reviewed By: aeubanks Differential Revision: https://reviews.llvm.org/D147394 (cherry picked from commit d4de7c2)
`SimplifySelectOps` is a late optimization in LLVM that attempts to translate `select(C, load(A), load(B))` into `load(select(C, A, B))`. However, in order for it to do this optimization, it needs to check that `C` does not depend on the result of `load(A)` or `load(B)`. Unfortunately (unlikely Julia and LLVM at the IR level), LLVM does not have a topological order of statements computed at this stage of the compiler, so LLVM needs to iterate through all statements in the function in order to perform this legality check. For large functions, this is extremely expensive, accounting for the majority of all compilation time for such functions. On the other hand, the optimization itself is minor, allowing at most the elision of one additional load (and doesn't fire particularly often, because the middle end can perform similar optimizations). Until there is a proper solution in LLVM, simply disable this optimizations, making LLVM several orders of magnitude faster on real world benchmarks. X-ref: llvm#60132
As shown in issue llvm#60649, the new shuffles were being inserted before a phi, and that is invalid. It seems like most test coverage for this fold (foldSelectShuffle) lives in the AArch64 dir, but this doesn't repro there for a base target.
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Do we need to implement it within the LLVM source tree, or could we have it within the Julia source code and contribute it upstream later? |
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I think we want it upstream. But we likely want ot backport it as well. |
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