ziglang/zig
259
6.0k
Fork
You've already forked zig
772

spirv: turn composite-integer panics into clean diagnostics #35198

Closed
quint wants to merge 2 commits from quint:spirv-fix-wide-int-type into master
pull from: quint:spirv-fix-wide-int-type
merge into: ziglang:master
ziglang:master
ziglang:elfv2
ziglang:spork8
ziglang:restricted
ziglang:0.16.x
ziglang:panic-rewrite
ziglang:parking-futex-lockfree
ziglang:windows-Io-cleanup
ziglang:Io-watch
ziglang:ParseCommandLineOptions
ziglang:windows-async-files
ziglang:poll-ring
ziglang:debug-file-leaks-differently
ziglang:debug-file-leaks
ziglang:ProcessPrng
ziglang:elfv2-dyn
ziglang:jobserver
ziglang:threadtheft
ziglang:io-threaded-no-queue
ziglang:0.15.x
ziglang:Io.net
ziglang:comptime-allocator
ziglang:restricted-function-pointers
ziglang:cli
ziglang:wasm-linker-writer
ziglang:wrangle-writer-buffering
ziglang:sha1-stream
ziglang:async-await-demo
ziglang:fixes
ziglang:0.14.x
ziglang:ast-node-methods
ziglang:macos-debug-info
ziglang:make-vs-configure
ziglang:fuzz-macos
ziglang:sans-aro
ziglang:ArrayList-reserve
ziglang:incr-bug
ziglang:llvm-ir-nosanitize-metadata
ziglang:ci-tarballs
ziglang:ci-scripts
ziglang:threadpool
ziglang:0.12.x
ziglang:new-pkg-hash
ziglang:json-diagnostics
ziglang:more-doctests
ziglang:rework-comptime-mutation
ziglang:0.11.x
ziglang:ci-perf-comment
ziglang:stage2-async
ziglang:0.10.x
ziglang:autofix
ziglang:0.9.x
ziglang:aro
ziglang:hcs
ziglang:0.8.x
ziglang:0.7.x
Contributor
Copy link

The SPIR-V backend panics with "reached unreachable code" on integer types it cannot lower:

  • Module.intType asserts on widths that align to more than 64 backing bits, so declaring a u128 crashes the compiler during type resolution.
  • Eleven arithmetic, bitwise, comparison, and reduce paths in CodeGen reach a composite_integer arm marked unreachable, crashing on any operation against such operands.

Replace the assert with a cg.fail naming the unsupported width, and each unreachable arm with a cg.todo naming the operation. Behavior on currently supported widths is unchanged; previously crashing widths now produce a compile error.

The SPIR-V backend panics with "reached unreachable code" on integer types it cannot lower: * `Module.intType` asserts on widths that align to more than 64 backing bits, so declaring a `u128` crashes the compiler during type resolution. * Eleven arithmetic, bitwise, comparison, and reduce paths in CodeGen reach a composite_integer arm marked unreachable, crashing on any operation against such operands. Replace the assert with a `cg.fail` naming the unsupported width, and each unreachable arm with a `cg.todo` naming the operation. Behavior on currently supported widths is unchanged; previously crashing widths now produce a compile error.
resolveType called Module.intType for any integer width, which
asserted backing_bits <= 64 for big-int types. Reject these widths
in resolveType with a fail() so users get a diagnostic instead of
a compiler panic.
fix(spirv): convert composite_integer unreachables to cg.todo
All checks were successful
ci / riscv64-linux-debug (pull_request) Has been skipped
ci / riscv64-linux-release (pull_request) Has been skipped
ci / x86_64-freebsd-release (pull_request) Successful in 39m23s
ci / x86_64-netbsd-release (pull_request) Successful in 52m0s
ci / x86_64-netbsd-debug (pull_request) Successful in 56m32s
ci / aarch64-macos-debug (pull_request) Successful in 2h26m28s
ci / x86_64-freebsd-debug (pull_request) Successful in 1h2m55s
ci / x86_64-linux-debug (pull_request) Successful in 1h5m44s
ci / aarch64-linux-release (pull_request) Successful in 1h29m29s
ci / x86_64-openbsd-debug (pull_request) Successful in 52m37s
ci / x86_64-openbsd-release (pull_request) Successful in 1h0m11s
ci / powerpc64le-linux-release (pull_request) Successful in 2h12m15s
ci / aarch64-linux-debug (pull_request) Successful in 2h19m33s
ci / x86_64-windows-release (pull_request) Successful in 1h11m22s
ci / x86_64-windows-debug (pull_request) Successful in 1h13m22s
ci / powerpc64le-linux-debug (pull_request) Successful in 3h32m47s
ci / x86_64-linux-debug-llvm (pull_request) Successful in 3h5m8s
ci / x86_64-linux-release (pull_request) Successful in 3h8m12s
ci / aarch64-macos-release (pull_request) Successful in 1h39m53s
ci / s390x-linux-release (pull_request) Successful in 1h48m35s
ci / loongarch64-linux-release (pull_request) Successful in 2h4m24s
ci / loongarch64-linux-debug (pull_request) Successful in 3h26m7s
ci / s390x-linux-debug (pull_request) Successful in 2h59m11s
ci / aarch64-freebsd-release (pull_request) Successful in 3h15m40s
ci / aarch64-freebsd-debug (pull_request) Successful in 4h38m36s
ci / aarch64-netbsd-debug (pull_request) Successful in 4h21m1s
ci / aarch64-netbsd-release (pull_request) Successful in 3h0m19s
b29f888643 
Eleven arithmetic/comparison/reduce paths panicked on big-int
operands. Replace each with cg.todo so unsupported widths surface
as compile errors instead of crashes.

Thank You!
Cherry-picked into #35777

Thank You! Cherry-picked into #35777
All checks were successful
ci / riscv64-linux-debug (pull_request) Has been skipped
ci / riscv64-linux-release (pull_request) Has been skipped
ci / x86_64-freebsd-release (pull_request) Successful in 39m23s
Required
Details
ci / x86_64-netbsd-release (pull_request) Successful in 52m0s
Required
Details
ci / x86_64-netbsd-debug (pull_request) Successful in 56m32s
Required
Details
ci / aarch64-macos-debug (pull_request) Successful in 2h26m28s
Required
Details
ci / x86_64-freebsd-debug (pull_request) Successful in 1h2m55s
Required
Details
ci / x86_64-linux-debug (pull_request) Successful in 1h5m44s
Required
Details
ci / aarch64-linux-release (pull_request) Successful in 1h29m29s
Required
Details
ci / x86_64-openbsd-debug (pull_request) Successful in 52m37s
Required
Details
ci / x86_64-openbsd-release (pull_request) Successful in 1h0m11s
Required
Details
ci / powerpc64le-linux-release (pull_request) Successful in 2h12m15s
Required
Details
ci / aarch64-linux-debug (pull_request) Successful in 2h19m33s
Required
Details
ci / x86_64-windows-release (pull_request) Successful in 1h11m22s
Required
Details
ci / x86_64-windows-debug (pull_request) Successful in 1h13m22s
Required
Details
ci / powerpc64le-linux-debug (pull_request) Successful in 3h32m47s
Required
Details
ci / x86_64-linux-debug-llvm (pull_request) Successful in 3h5m8s
Required
Details
ci / x86_64-linux-release (pull_request) Successful in 3h8m12s
Required
Details
ci / aarch64-macos-release (pull_request) Successful in 1h39m53s
Required
Details
ci / s390x-linux-release (pull_request) Successful in 1h48m35s
Required
Details
ci / loongarch64-linux-release (pull_request) Successful in 2h4m24s
ci / loongarch64-linux-debug (pull_request) Successful in 3h26m7s
ci / s390x-linux-debug (pull_request) Successful in 2h59m11s
Required
Details
ci / aarch64-freebsd-release (pull_request) Successful in 3h15m40s
ci / aarch64-freebsd-debug (pull_request) Successful in 4h38m36s
ci / aarch64-netbsd-debug (pull_request) Successful in 4h21m1s
ci / aarch64-netbsd-release (pull_request) Successful in 3h0m19s

Pull request closed

This pull request cannot be reopened because the branch was deleted.
Sign in to join this conversation.
No reviewers
Labels
Clear labels
abi/f32
abi/ilp32
abi/sf
accepted
This proposal is planned.
arch/21k
arch/6502
arch/aarch64
arch/alpha
arch/amdgcn
arch/arc
arch/arc32
arch/arc64
arch/arm
arch/avr
arch/bfin
arch/bpf
arch/colossus
arch/cris
arch/csky
arch/dlx
arch/epiphany
arch/fr30
arch/frv
arch/hexagon
arch/hppa
arch/hppa64
arch/ia64
arch/kalimba
arch/kvx
arch/lanai
arch/lm32
arch/loongarch32
arch/loongarch64
arch/m32r
arch/m68k
arch/m88k
arch/mcore
arch/microblaze
arch/mips
arch/mips64
arch/mmix
arch/moxie
arch/mrisc32
arch/msp430
arch/nds32
arch/ns32k
arch/nvptx
arch/or1k
arch/powerpc
arch/powerpc64
arch/propeller
arch/riscv32
arch/riscv64
arch/rl78
arch/rx
arch/s390x
arch/sh
arch/sparc
arch/sparc64
arch/spirv
arch/spu
arch/tricore
arch/v850
arch/vax
arch/vc4
arch/ve
arch/wasm
arch/x86
arch/x86_64
arch/xcore
arch/xtensa
autodoc
The web application for interactive documentation and generation of its assets.
backend/c
The C backend outputs C source code.
backend/llvm
The LLVM backend outputs an LLVM bitcode module.
backend/self-hosted
The self-hosted backends produce machine code directly.
binutils
Zig's included binary utilities: zig ar, zig dlltool, zig lib, zig ranlib, zig objcopy, and zig rc.
breaking
Implementing this issue could cause existing code to no longer compile or have different behavior.
build system
The Zig build system - zig build, std.Build, the build runner, and package management.
debug info
An issue related to debug information (e.g. DWARF) produced by the Zig compiler.
docs
An issue with documentation, e.g. the language reference or standard library doc comments.
error message
This issue points out an error message that is unhelpful and should be improved.
frontend
Tokenization, parsing, AstGen, ZonGen, Sema, Legalize, and Liveness.
fuzzing
An issue related to Zig's integrated fuzz testing.
incremental
Reuse of internal compiler state for faster compilation.
lib/c
This issue relates to Zig's libc implementation and/or vendored libcs.
lib/compiler-rt
This issue relates to Zig's compiler-rt library.
lib/cxx
This issue relates to Zig's vendored libc++ and/or libc++abi.
lib/std
This issue relates to Zig's standard library.
lib/tsan
This issue relates to Zig's vendored libtsan.
lib/ubsan-rt
This issue relates to Zig's ubsan-rt library.
lib/unwind
This issue relates to Zig's vendored libunwind.
linking
Zig's integrated object file and incremental linker.
miscompilation
The compiler reports success but produces semantically incorrect code.
os/android
os/contiki
os/dragonfly
os/driverkit
os/emscripten
os/freebsd
os/fuchsia
os/haiku
os/hermit
os/hurd
os/illumos
os/ios
os/linux
os/maccatalyst
os/macos
os/managarm
os/netbsd
os/ohos
os/openbsd
os/plan9
os/redox
os/rtems
os/serenity
os/tvos
os/uefi
os/visionos
os/wasi
os/watchos
os/windows
proposal
This issue suggests language modifications. If it also has the "accepted" label then it is planned.
release notes
This issue or pull request should be mentioned in the release notes.
testing
This issue is related to testing the compiler, standard library, or other parts of Zig.
zig cc
Zig as a drop-in C-family compiler.
zig fmt
The Zig source code formatter.
zig reduce
The Zig source code reduction tool.
bounty
https://ziglang.org/news/announcing-donor-bounties
bug
Observed behavior contradicts documented or intended behavior.
contributor-friendly
This issue is limited in scope and/or knowledge of project internals.
downstream
An issue with a third-party project that uses this project.
enhancement
Solving this issue will likely involve adding new logic or components to the codebase.
infra
An issue related to project infrastructure, e.g. continuous integration.
optimization
A task to improve performance and/or resource usage.
question
No questions on the issue tracker; use a community space instead.
regression
Something that used to work in a previous version stopped working
upstream
An issue with a third-party project that this project uses.
use case
Describes a real use case that is difficult or impossible, but does not propose a solution.
No labels
abi/f32
abi/ilp32
abi/sf
accepted
arch/21k
arch/6502
arch/aarch64
arch/alpha
arch/amdgcn
arch/arc
arch/arc32
arch/arc64
arch/arm
arch/avr
arch/bfin
arch/bpf
arch/colossus
arch/cris
arch/csky
arch/dlx
arch/epiphany
arch/fr30
arch/frv
arch/hexagon
arch/hppa
arch/hppa64
arch/ia64
arch/kalimba
arch/kvx
arch/lanai
arch/lm32
arch/loongarch32
arch/loongarch64
arch/m32r
arch/m68k
arch/m88k
arch/mcore
arch/microblaze
arch/mips
arch/mips64
arch/mmix
arch/moxie
arch/mrisc32
arch/msp430
arch/nds32
arch/ns32k
arch/nvptx
arch/or1k
arch/powerpc
arch/powerpc64
arch/propeller
arch/riscv32
arch/riscv64
arch/rl78
arch/rx
arch/s390x
arch/sh
arch/sparc
arch/sparc64
arch/spirv
arch/spu
arch/tricore
arch/v850
arch/vax
arch/vc4
arch/ve
arch/wasm
arch/x86
arch/x86_64
arch/xcore
arch/xtensa
autodoc
backend/c
backend/llvm
backend/self-hosted
binutils
breaking
build system
debug info
docs
error message
frontend
fuzzing
incremental
lib/c
lib/compiler-rt
lib/cxx
lib/std
lib/tsan
lib/ubsan-rt
lib/unwind
linking
miscompilation
os/android
os/contiki
os/dragonfly
os/driverkit
os/emscripten
os/freebsd
os/fuchsia
os/haiku
os/hermit
os/hurd
os/illumos
os/ios
os/linux
os/maccatalyst
os/macos
os/managarm
os/netbsd
os/ohos
os/openbsd
os/plan9
os/redox
os/rtems
os/serenity
os/tvos
os/uefi
os/visionos
os/wasi
os/watchos
os/windows
proposal
release notes
testing
zig cc
zig fmt
zig reduce
bounty
bug
contributor-friendly
downstream
enhancement
infra
optimization
question
regression
upstream
use case
Milestone
Clear milestone
No items
No milestone
Projects
Clear projects
No items
No project
Assignees
Clear assignees
No assignees
2 participants
Notifications
Due date
The due date is invalid or out of range. Please use the format "yyyy-mm-dd".

No due date set.

Dependencies

No dependencies set.

Reference
ziglang/zig!35198
Reference in a new issue
ziglang/zig
No description provided.
Delete branch "quint:spirv-fix-wide-int-type"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?