[WIP] LLVM 19 by alexrp · Pull Request #21183 · ziglang/zig

alexrp · 2024-08-23T23:10:19Z

Currently using LLVM 19.1.0-rc3. Following the documented process.

Things to be done:

Add ProcessorAlias support to tools/update_cpu_features.zig.
- This is why some CPU models have gone missing in lib/std/Target/aarch64.zig, which in turn breaks macOS builds.
Add a bridgeos tag to std.Target.Os.Tag.
Investigate and fix various failures in zig build test-link.
- [WIP] LLVM 19 #21183 (comment)
Revert any workarounds that were committed for the linked issues below.
Update ThreadSanitizer sources.
- The last update for these was with LLVM 17.
- I will probably wait with doing this until LLVM 19.1.0-final is tagged since the process is a bit more annoying than the other libraries.
Re-do most of the steps when LLVM 19.1.0-final is tagged.
Figure out what to do with the @bitCast of packed struct containing pointer test.
- Context: https://discourse.llvm.org/t/rfc-remove-most-constant-expressions/63179

Other than the above, we're in relatively good shape. The full test suite builds successfully for all platforms ~~(with the CPU model caveat above)~~ and, other than the test-link failures, runs successfully for all actively-tested Linux triples (with QEMU and multi-glibc) and macOS. Still need to run tests on Windows.

Closes #12011.
Closes #16177.
Closes #17381.
Closes #17514.
Closes #17902.
Closes #18872.
Closes #21064.
Closes #21336.

CI results completely irrelevant at this stage.

Rexicon226 · 2024-08-23T23:12:46Z

I don't have a macOS machine so I would very much appreciate if someone who does could try to run the test suite on one. I do have a Windows machine, but it would take me some time to set up a dev environment there, so would also appreciate any testers there.

Can test on an M3 Pro, give me a couple hours.

Rexicon226 · 2024-08-30T14:24:35Z

@Luukdegram I'm silly and accidentally force-pushed before pulling your commit locally yesterday. I redid it from memory and attributed it to you in e632e71; hopefully it's ok. Also, can you verify that aeaefba is correct?

e948d89

alexrp · 2024-08-30T18:37:58Z

This branch now passes the full test suite on Linux. It would be great if someone with a Windows dev environment already set up would be willing to build and test the branch.

Luukdegram · 2024-08-31T06:34:15Z

@Luukdegram I'm silly and accidentally force-pushed before pulling your commit locally yesterday. I redid it from memory and attributed it to you in e632e71; hopefully it's ok. Also, can you verify that aeaefba is correct?

No worries! Both changes look good.

alexrp · 2024-09-03T15:35:26Z

Just FYI, 19.1.0-final got pushed back by 2 weeks: https://discourse.llvm.org/t/llvm-19-1-0-rc4-released/81039

Co-authored-by: David Rubin <daviru007@icloud.com>

* Moved the tz.cpp patch to experimental/tzdb.cpp. * Extended the __config_site patch to a few more files.

* Add `ProcessorAlias` support. * Bump output buffer size. * Include `i` extension in RISC-V baselines. * Update evaluation branch quota for RISC-V. * Retain some CPU features that LLVM removed. * Flatten more 'meta-features' used for CPU models. * Remove some superfluous dependencies.

…cpus misuse.

This is no longer supported in LLVM 19; fall back to the generic code path.

@as

…ily. TODO: Figure out what to do about this. Context: https://discourse.llvm.org/t/rfc-remove-most-constant-expressions/63179 After changing our emit strategy for packed structs to just write to memory: test-behavior └─ run test behavior-x86_64-linux.6.5...6.5-gnu.2.38-x86_64-ReleaseSmall-libc └─ zig test ReleaseSmall native failure error: thread 44346 panic: attempt to unwrap error: ReinterpretDeclRef /home/alexrp/Source/zig/src/Value.zig:571:42: 0x1f33514 in writeToPackedMemory (zig) if (!val.ptrHasIntAddr(mod)) return error.ReinterpretDeclRef; ^ /home/alexrp/Source/zig/src/Value.zig:548:17: 0x1f32f45 in writeToPackedMemory (zig) try field_val.writeToPackedMemory(field_ty, pt, buffer, bit_offset + bits); ^ /home/alexrp/Source/zig/src/codegen/llvm.zig:3706:89: 0x1ca2366 in lowerValueToInt (zig) val.writeToPackedMemory(ty, pt, std.mem.sliceAsBytes(limbs)[0..bytes], 0) catch unreachable; ^ /home/alexrp/Source/zig/src/codegen/llvm.zig:4083:49: 0x1a33800 in lowerValue (zig) return o.lowerValueToInt(llvm_int_ty, arg_val); ^ /home/alexrp/Source/zig/src/codegen/llvm.zig:4798:42: 0x2ec4e6a in resolveValue (zig) const llvm_val = try o.lowerValue(val.toIntern()); ^ /home/alexrp/Source/zig/src/codegen/llvm.zig:4789:47: 0x2ec4bd3 in resolveInst (zig) const llvm_val = try self.resolveValue((try self.air.value(inst, self.ng.object.pt)).?); ^ /home/alexrp/Source/zig/src/codegen/llvm.zig:8996:49: 0x2f022e9 in airStore (zig) const src_operand = try self.resolveInst(bin_op.rhs); ^ /home/alexrp/Source/zig/src/codegen/llvm.zig:4967:53: 0x29f7260 in genBody (zig) .store => try self.airStore(inst, false), ^ /home/alexrp/Source/zig/src/codegen/llvm.zig:1682:19: 0x29f147c in updateFunc (zig) fg.genBody(air.getMainBody()) catch |err| switch (err) { ^ /home/alexrp/Source/zig/src/link/Elf.zig:2916:70: 0x2eb0f15 in updateFunc (zig) if (self.llvm_object) |llvm_object| return llvm_object.updateFunc(pt, func_index, air, liveness); ^ /home/alexrp/Source/zig/src/link.zig:426:82: 0x29fbef5 in updateFunc (zig) return @as(*tag.Type(), @fieldParentPtr("base", base)).updateFunc(pt, func_index, air, liveness); ^ /home/alexrp/Source/zig/src/Zcu/PerThread.zig:876:22: 0x25f3d9e in linkerUpdateFunc (zig) lf.updateFunc(pt, func_index, air, liveness) catch |err| switch (err) { ^ /home/alexrp/Source/zig/src/Compilation.zig:3975:36: 0x21768fe in processOneCodegenJob (zig) try pt.linkerUpdateFunc(func.func, func.air); ^ /home/alexrp/Source/zig/src/Compilation.zig:3928:36: 0x2176541 in queueCodegenJob (zig) return processOneCodegenJob(tid, comp, codegen_job); ^ /home/alexrp/Source/zig/src/Compilation.zig:3682:37: 0x1e9d37f in processOneJob (zig) try comp.queueCodegenJob(tid, .{ .func = .{ ^ /home/alexrp/Source/zig/src/Compilation.zig:3638:30: 0x1c1f6c1 in performAllTheWorkInner (zig) try processOneJob(@intFromEnum(Zcu.PerThread.Id.main), comp, job, main_progress_node); ^ /home/alexrp/Source/zig/src/Compilation.zig:3508:36: 0x1ab6e10 in performAllTheWork (zig) try comp.performAllTheWorkInner(main_progress_node); ^ /home/alexrp/Source/zig/src/Compilation.zig:2269:31: 0x1ab25b9 in update (zig) try comp.performAllTheWork(main_progress_node); ^ /home/alexrp/Source/zig/src/main.zig:4156:32: 0x1b01351 in serve (zig) try comp.update(main_progress_node); ^ /home/alexrp/Source/zig/src/main.zig:3453:22: 0x1b20d7c in buildOutputType (zig) try serve( ^ /home/alexrp/Source/zig/src/main.zig:267:31: 0x1969c54 in mainArgs (zig) return buildOutputType(gpa, arena, args, .zig_test); ^ /home/alexrp/Source/zig/src/main.zig:199:20: 0x19669c5 in main (zig) return mainArgs(gpa, arena, args); ^ /home/alexrp/Source/zig/lib/std/start.zig:614:37: 0x19664ee in main (zig) const result = root.main() catch |err| { ^ ../sysdeps/nptl/libc_start_call_main.h:58:16: 0x7a453da2814f in __libc_start_call_main (../sysdeps/x86/libc-start.c) ../csu/libc-start.c:360:3: 0x7a453da28208 in __libc_start_main_impl (../sysdeps/x86/libc-start.c) ???:?:?: 0x1966134 in ??? (???) ???:?:?: 0x0 in ??? (???)

Closes #18872.

Closes #16177.

This reverts commit 234693b.

This partially reverts commit ab4d6bf.

andrewrk · 2024-09-05T21:29:22Z

Merged into llvm19 branch.

alexrp · 2024-09-20T05:55:32Z

Merged into master in c6ad452.

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Rexicon226 reviewed Aug 29, 2024

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alexrp mentioned this pull request Aug 30, 2024

std.crypto.ml_kem tests are very slow, especially under QEMU #21255

Closed

alexrp mentioned this pull request Aug 31, 2024

Fix soft float support, split musl triples by float ABI, and enable CI #21269

Merged

alexrp and others added 17 commits September 5, 2024 22:03

cmake: Update to LLVM 19.

f04d2c1

Co-authored-by: David Rubin <daviru007@icloud.com>

compiler: Update LLVM/Clang driver files to LLVM/Clang 19.

adfd150

zig_llvm: Update to LLVM 19.

c3140e2

zig_clang: Update to Clang 19.

9a7cc0d

Co-authored-by: David Rubin <daviru007@icloud.com>

clang: Update options data to Clang 19.

707b521

clang: Update compiler-provided C headers to Clang 19.

fb06671

libunwind: Update to LLVM 19.

83c7126

libunwind: Synchronize some CFLAGS/CXXFLAGS with upstream.

e10dd31

libcxxabi: Update to LLVM 19.

9d88e00

libcxx: Update to LLVM 19.

8504e23

* Moved the tz.cpp patch to experimental/tzdb.cpp. * Extended the __config_site patch to a few more files.

libcxx: Synchronize some CXXFLAGS with upstream.

989132f

update_cpu_features: Fix feature_overrides logic and replace an omit_…

6264734

…cpus misuse.

std.Target: Update CPU models/features for LLVM 19.

d5ee409

llvm: Stop emitting shl/xor ops for constant packed structs.

b932583

This is no longer supported in LLVM 19; fall back to the generic code path.

std.Target: Add bridgeos tag to Os.

e0923af

alexrp and others added 8 commits September 5, 2024 22:03

Compilation: Synchronize some libcxx CXXFLAGS with upstream.

e5cb569

link.Wasm.Feature: Update to mirror std.Target.wasm.

d6abf47

test: Update wasm/infer-features based on what LLVM produces.

0f183ba

std.zig.system.darwin.macos: Enable Apple M4 CPU detection.

3ba200b

test: Re-enable LLVM riscv64 module tests.

c1bed62

Closes #18872.

test: Re-enable store vector with memset for LLVM.

6f4fbf5

Closes #16177.

Revert "tests: skip native CPU std tests on Windows"

73f46ca

This reverts commit 234693b.

Partially revert "LLVM: work around @floatFromInt bug"

3704ad0

This partially reverts commit ab4d6bf.

alexrp closed this Sep 20, 2024

alexrp deleted the llvm-19 branch September 20, 2024 07:26

alexrp mentioned this pull request Apr 22, 2026

LLVM 20 #22780

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[WIP] LLVM 19#21183

[WIP] LLVM 19#21183
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alexrp commented Aug 23, 2024 •

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