Crash compiling simde with tot but not latest

[ajraymond]

Trying to compile https://github.com/simd-everywhere/simde, commit 83fdacb51046facb132f25438fe288c71e06817a, per the procedure in .github/workflows/ci.yml.

Was able to reproduce locally on Debian trixie.

It works with latest, but fails with tot.

Version of emscripten/emsdk:

root@simde:~/simde# emcc -v
emcc (Emscripten gcc/clang-like replacement + linker emulating GNU ld) 4.0.23-git (035c704d5cbeb85481eb1c3273617d21b881d674)
clang version 22.0.0git (https:/github.com/llvm/llvm-project c36abf67bb2479fcb3ddee942b5c09c60109500d)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /opt/emsdk/upstream/bin
Build config: +assertions

Failing command line in full:

root@simde:~/simde# cat /tmp/madd-e814f6.sh
# Crash reproducer for clang version 22.0.0git (https:/github.com/llvm/llvm-project c36abf67bb2479fcb3ddee942b5c09c60109500d)
# Driver args: "--driver-mode=g++" "-target" "wasm32-unknown-emscripten" "-fignore-exceptions" "-mllvm" "-combiner-global-alias-analysis=false" "-mllvm" "-enable-emscripten-sjlj" "-mllvm" "-disable-lsr" "--sysroot=/opt/emsdk/upstream/emscripten/cache/sysroot" "-D" "EMSCRIPTEN" "-Xclang" "-iwithsysroot/include/fakesdl" "-Xclang" "-iwithsysroot/include/compat" "-I" "test/x86/avx512/madd-native-cpp.js.p" "-I" "test/x86/avx512" "-I" "../test/x86/avx512" "-I" "." "-I" ".." "-fdiagnostics-color=always" "-D" "_FILE_OFFSET_BITS=64" "-Wall" "-Winvalid-pch" "-O2" "-g" "-Weverything" "-fno-lax-vector-conversions" "-Werror" "-O2" "-msimd128" "-Wno-unsafe-buffer-usage" "-Wno-switch-default" "-Wno-implicit-int-conversion-on-negation" "-Wno-sign-conversion" "-Wno-implicit-int-conversion" "-fopenmp-simd" "-D" "SIMDE_CONSTRAINED_COMPILATION" "-D" "SIMDE_ENABLE_OPENMP" "-D" "SIMDE_TEST_BARE" "-MD" "-MQ" "test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o" "-MF" "test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o.d" "-o" "test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o" "-c" "test/x86/avx512/madd.cpp"
# Original command:  "/opt/emsdk/upstream/bin/clang-22" "-cc1" "-triple" "wasm32-unknown-emscripten" "-O2" "-emit-obj" "-disable-free" "-clear-ast-before-backend" "-main-file-name" "madd.cpp" "-mrelocation-model" "static" "-mframe-pointer=none" "-ffp-contract=on" "-fno-rounding-math" "-mconstructor-aliases" "-target-cpu" "generic" "-target-feature" "+simd128" "-fvisibility=hidden" "-gkey-instructions" "-debug-info-kind=constructor" "-dwarf-version=4" "-debugger-tuning=gdb" "-fdebug-compilation-dir=/root/simde/build" "-fcoverage-compilation-dir=/root/simde/build" "-resource-dir" "/opt/emsdk/upstream/lib/clang/22" "-dependency-file" "test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o.d" "-MT" "test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o" "-sys-header-deps" "-D" "EMSCRIPTEN" "-I" "test/x86/avx512/madd-native-cpp.js.p" "-I" "test/x86/avx512" "-I" "../test/x86/avx512" "-I" "." "-I" ".." "-D" "_FILE_OFFSET_BITS=64" "-D" "SIMDE_CONSTRAINED_COMPILATION" "-D" "SIMDE_ENABLE_OPENMP" "-D" "SIMDE_TEST_BARE" "-isysroot" "/opt/emsdk/upstream/emscripten/cache/sysroot" "-internal-isystem" "/opt/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten/c++/v1" "-internal-isystem" "/opt/emsdk/upstream/emscripten/cache/sysroot/include/c++/v1" "-internal-isystem" "/opt/emsdk/upstream/lib/clang/22/include" "-internal-isystem" "/opt/emsdk/upstream/emscripten/cache/sysroot/include/wasm32-emscripten" "-internal-isystem" "/opt/emsdk/upstream/emscripten/cache/sysroot/include" "-Wall" "-Winvalid-pch" "-Weverything" "-Werror" "-Wno-unsafe-buffer-usage" "-Wno-switch-default" "-Wno-implicit-int-conversion-on-negation" "-Wno-sign-conversion" "-Wno-implicit-int-conversion" "-fdeprecated-macro" "-ferror-limit" "19" "-fopenmp-simd" "-flax-vector-conversions=none" "-fgnuc-version=4.2.1" "-fskip-odr-check-in-gmf" "-fcxx-exceptions" "-fignore-exceptions" "-fexceptions" "-fcolor-diagnostics" "-vectorize-loops" "-vectorize-slp" "-iwithsysroot/include/fakesdl" "-iwithsysroot/include/compat" "-mllvm" "-combiner-global-alias-analysis=false" "-mllvm" "-enable-emscripten-sjlj" "-mllvm" "-disable-lsr" "-o" "test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o" "-x" "c++" "test/x86/avx512/madd.cpp"
 "/opt/emsdk/upstream/bin/clang-22" "-cc1" "-triple" "wasm32-unknown-emscripten" "-O2" "-emit-obj" "-disable-free" "-clear-ast-before-backend" "-main-file-name" "madd.cpp" "-mrelocation-model" "static" "-mframe-pointer=none" "-ffp-contract=on" "-fno-rounding-math" "-mconstructor-aliases" "-target-cpu" "generic" "-target-feature" "+simd128" "-fvisibility=hidden" "-gkey-instructions" "-debug-info-kind=constructor" "-dwarf-version=4" "-debugger-tuning=gdb" "-fdebug-compilation-dir=/root/simde/build" "-fcoverage-compilation-dir=/root/simde/build" "-sys-header-deps" "-D" "EMSCRIPTEN" "-D" "_FILE_OFFSET_BITS=64" "-D" "SIMDE_CONSTRAINED_COMPILATION" "-D" "SIMDE_ENABLE_OPENMP" "-D" "SIMDE_TEST_BARE" "-Wall" "-Winvalid-pch" "-Weverything" "-Werror" "-Wno-unsafe-buffer-usage" "-Wno-switch-default" "-Wno-implicit-int-conversion-on-negation" "-Wno-sign-conversion" "-Wno-implicit-int-conversion" "-fdeprecated-macro" "-ferror-limit" "19" "-fopenmp-simd" "-flax-vector-conversions=none" "-fgnuc-version=4.2.1" "-fskip-odr-check-in-gmf" "-fcxx-exceptions" "-fignore-exceptions" "-fexceptions" "-fcolor-diagnostics" "-vectorize-loops" "-vectorize-slp" "-iwithsysroot/include/fakesdl" "-iwithsysroot/include/compat" "-mllvm" "-combiner-global-alias-analysis=false" "-mllvm" "-enable-emscripten-sjlj" "-mllvm" "-disable-lsr" "-x" "c++" "madd-e814f6.cpp"

madd-e814f6.zip

Full link command and output with -v appended:

[3/3797] /opt/emsdk/upstream/emscripten/em++ -Itest/x86/avx512/madd-native-cpp.js.p -Itest/x86/avx512 -I../test/x86/avx512 -I. -I.. -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O2 -g -Weverything -fno-lax-vector-conversions -Werror -O2 -msimd128 -Wno-unsafe-buffer-usage -Wno-switch-default -Wno-implicit-int-conversion-on-negation -Wno-sign-conversion -Wno-implicit-int-conversion -fopenmp-simd -DSIMDE_CONSTRAINED_COMPILATION -DSIMDE_ENABLE_OPENMP -DSIMDE_TEST_BARE -MD -MQ test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o -MF test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o.d -o test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o -c test/x86/avx512/madd.cpp
FAILED: test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o
/opt/emsdk/upstream/emscripten/em++ -Itest/x86/avx512/madd-native-cpp.js.p -Itest/x86/avx512 -I../test/x86/avx512 -I. -I.. -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O2 -g -Weverything -fno-lax-vector-conversions -Werror -O2 -msimd128 -Wno-unsafe-buffer-usage -Wno-switch-default -Wno-implicit-int-conversion-on-negation -Wno-sign-conversion -Wno-implicit-int-conversion -fopenmp-simd -DSIMDE_CONSTRAINED_COMPILATION -DSIMDE_ENABLE_OPENMP -DSIMDE_TEST_BARE -MD -MQ test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o -MF test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o.d -o test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o -c test/x86/avx512/madd.cpp
clang++: /b/s/w/ir/cache/builder/emscripten-releases/llvm-project/llvm/include/llvm/ADT/APInt.h:128: llvm::APInt::APInt(unsigned int, uint64_t, bool, bool): Assertion `llvm::isUIntN(BitWidth, val) && "Value is not an N-bit unsigned value"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.      Program arguments: /opt/emsdk/upstream/bin/clang++ -target wasm32-unknown-emscripten -fignore-exceptions -mllvm -combiner-global-alias-analysis=false -mllvm -enable-emscripten-sjlj -mllvm -disable-lsr --sysroot=/opt/emsdk/upstream/emscripten/cache/sysroot -DEMSCRIPTEN -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -Itest/x86/avx512/madd-native-cpp.js.p -Itest/x86/avx512 -I../test/x86/avx512 -I. -I.. -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O2 -g -Weverything -fno-lax-vector-conversions -Werror -O2 -msimd128 -Wno-unsafe-buffer-usage -Wno-switch-default -Wno-implicit-int-conversion-on-negation -Wno-sign-conversion -Wno-implicit-int-conversion -fopenmp-simd -DSIMDE_CONSTRAINED_COMPILATION -DSIMDE_ENABLE_OPENMP -DSIMDE_TEST_BARE -MD -MQ test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o -MF test/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o.d -otest/x86/avx512/madd-native-cpp.js.p/meson-generated_.._madd.cpp.o -c test/x86/avx512/madd.cpp
1.      <eof> parser at end of file
2.      Optimizer
3.      Running pass "require<globals-aa>,function(invalidate<aa>),require<profile-summary>,cgscc(devirt<4>(inline,function-attrs<skip-non-recursive-function-attrs>,openmp-opt-cgscc,function<eager-inv;no-rerun>(sroa<modify-cfg>,early-cse<memssa>,speculative-execution<only-if-divergent-target>,jump-threading,correlated-propagation,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,aggressive-instcombine,libcalls-shrinkwrap,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,reassociate,constraint-elimination,loop-mssa(loop-instsimplify,loop-simplifycfg,licm<no-allowspeculation>,loop-rotate<header-duplication;no-prepare-for-lto>,licm<allowspeculation>,simple-loop-unswitch<no-nontrivial;trivial>),simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,loop(loop-idiom,indvars,extra-simple-loop-unswitch-passes,loop-deletion,loop-unroll-full),sroa<modify-cfg>,vector-combine,mldst-motion<no-split-footer-bb>,gvn<>,sccp,bdce,instcombine<max-iterations=1;no-verify-fixpoint>,jump-threading,correlated-propagation,adce,memcpyopt,dse,move-auto-init,loop-mssa(licm<allowspeculation>),coro-elide,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;switch-to-arithmetic;no-switch-to-lookup;keep-loops;hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>),function-attrs,function(require<should-not-run-function-passes>),coro-split,coro-annotation-elide)),function(invalidate<should-not-run-function-passes>),cgscc(devirt<4>())" on module "test/x86/avx512/madd.cpp"
4.      Running pass "cgscc(devirt<4>(inline,function-attrs<skip-non-recursive-function-attrs>,openmp-opt-cgscc,function<eager-inv;no-rerun>(sroa<modify-cfg>,early-cse<memssa>,speculative-execution<only-if-divergent-target>,jump-threading,correlated-propagation,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,aggressive-instcombine,libcalls-shrinkwrap,tailcallelim,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,reassociate,constraint-elimination,loop-mssa(loop-instsimplify,loop-simplifycfg,licm<no-allowspeculation>,loop-rotate<header-duplication;no-prepare-for-lto>,licm<allowspeculation>,simple-loop-unswitch<no-nontrivial;trivial>),simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;no-switch-to-arithmetic;no-switch-to-lookup;keep-loops;no-hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;no-sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>,loop(loop-idiom,indvars,extra-simple-loop-unswitch-passes,loop-deletion,loop-unroll-full),sroa<modify-cfg>,vector-combine,mldst-motion<no-split-footer-bb>,gvn<>,sccp,bdce,instcombine<max-iterations=1;no-verify-fixpoint>,jump-threading,correlated-propagation,adce,memcpyopt,dse,move-auto-init,loop-mssa(licm<allowspeculation>),coro-elide,simplifycfg<bonus-inst-threshold=1;no-forward-switch-cond;switch-range-to-icmp;switch-to-arithmetic;no-switch-to-lookup;keep-loops;hoist-common-insts;no-hoist-loads-stores-with-cond-faulting;sink-common-insts;speculate-blocks;simplify-cond-branch;no-speculate-unpredictables>,instcombine<max-iterations=1;no-verify-fixpoint>),function-attrs,function(require<should-not-run-function-passes>),coro-split,coro-annotation-elide))" on module "test/x86/avx512/madd.cpp"
5.      Running pass "loop(loop-idiom,indvars,extra-simple-loop-unswitch-passes,loop-deletion,loop-unroll-full)" on function "_ZL30test_simde_mm_maskz_madd_epi16v"
 #0 0x00007fe463da49d8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x21a49d8)
 #1 0x00007fe463da2005 llvm::sys::RunSignalHandlers() (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x21a2005)
 #2 0x00007fe463da3d6f llvm::sys::CleanupOnSignal(unsigned long) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x21a3d6f)
 #3 0x00007fe463cc5766 CrashRecoverySignalHandler(int) CrashRecoveryContext.cpp:0:0
 #4 0x00007fe461a49df0 (/lib/x86_64-linux-gnu/libc.so.6+0x3fdf0)
 #5 0x00007fe461a9e95c (/lib/x86_64-linux-gnu/libc.so.6+0x9495c)
 #6 0x00007fe461a49cc2 raise (/lib/x86_64-linux-gnu/libc.so.6+0x3fcc2)
 #7 0x00007fe461a324ac abort (/lib/x86_64-linux-gnu/libc.so.6+0x284ac)
 #8 0x00007fe461a32420 __assert_perror_fail (/lib/x86_64-linux-gnu/libc.so.6+0x28420)
 #9 0x00007fe463c7d62d llvm::APInt::APInt(unsigned int, unsigned long, bool, bool) APInt.cpp:0:0
#10 0x00007fe463e3eff2 llvm::ConstantInt::get(llvm::Type*, unsigned long, bool, bool) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x223eff2)
#11 0x00007fe465be470d llvm::ConstantFoldCall(llvm::CallBase const*, llvm::Function*, llvm::ArrayRef<llvm::Constant*>, llvm::TargetLibraryInfo const*, bool) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x3fe470d)
#12 0x00007fe465cb1e6d tryConstantFoldCall(llvm::CallBase*, llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::SimplifyQuery const&) InstructionSimplify.cpp:0:0
#13 0x00007fe465cb1ca0 llvm::simplifyCall(llvm::CallBase*, llvm::Value*, llvm::ArrayRef<llvm::Value*>, llvm::SimplifyQuery const&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x40b1ca0)
#14 0x00007fe465cb37fb simplifyInstructionWithOperands(llvm::Instruction*, llvm::ArrayRef<llvm::Value*>, llvm::SimplifyQuery const&, unsigned int) InstructionSimplify.cpp:0:0
#15 0x00007fe465cb44b3 llvm::simplifyInstruction(llvm::Instruction*, llvm::SimplifyQuery const&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x40b44b3)
#16 0x00007fe464f2c153 llvm::simplifyLoopAfterUnroll(llvm::Loop*, bool, llvm::LoopInfo*, llvm::ScalarEvolution*, llvm::DominatorTree*, llvm::AssumptionCache*, llvm::TargetTransformInfo const*, llvm::AAResults*) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x332c153)
#17 0x00007fe464f31b4e llvm::UnrollLoop(llvm::Loop*, llvm::UnrollLoopOptions, llvm::LoopInfo*, llvm::ScalarEvolution*, llvm::DominatorTree*, llvm::AssumptionCache*, llvm::TargetTransformInfo const*, llvm::OptimizationRemarkEmitter*, bool, llvm::Loop**, llvm::AAResults*) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x3331b4e)
#18 0x00007fe465445e42 tryToUnrollLoop(llvm::Loop*, llvm::DominatorTree&, llvm::LoopInfo*, llvm::ScalarEvolution&, llvm::TargetTransformInfo const&, llvm::AssumptionCache&, llvm::OptimizationRemarkEmitter&, llvm::BlockFrequencyInfo*, llvm::ProfileSummaryInfo*, bool, int, bool, bool, bool, std::__2::optional<unsigned int>, std::__2::optional<unsigned int>, std::__2::optional<bool>, std::__2::optional<bool>, std::__2::optional<bool>, std::__2::optional<bool>, std::__2::optional<bool>, std::__2::optional<unsigned int>, llvm::AAResults*) LoopUnrollPass.cpp:0:0
#19 0x00007fe465444891 llvm::LoopFullUnrollPass::run(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x3844891)
#20 0x00007fe4653fc60f std::__2::optional<llvm::PreservedAnalyses> llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::runSinglePass<llvm::Loop, std::__2::unique_ptr<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>, std::__2::default_delete<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>>>>(llvm::Loop&, std::__2::unique_ptr<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>, std::__2::default_delete<llvm::detail::PassConcept<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>>>&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&, llvm::PassInstrumentation&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x37fc60f)
#21 0x00007fe4653fc2e1 llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::runWithoutLoopNestPasses(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x37fc2e1)
#22 0x00007fe4653fba56 llvm::PassManager<llvm::Loop, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&>::run(llvm::Loop&, llvm::AnalysisManager<llvm::Loop, llvm::LoopStandardAnalysisResults&>&, llvm::LoopStandardAnalysisResults&, llvm::LPMUpdater&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x37fba56)
#23 0x00007fe4653fd366 llvm::FunctionToLoopPassAdaptor::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x37fd366)
#24 0x00007fe463fd1d47 llvm::PassManager<llvm::Function, llvm::AnalysisManager<llvm::Function>>::run(llvm::Function&, llvm::AnalysisManager<llvm::Function>&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x23d1d47)
#25 0x00007fe465bbfc43 llvm::CGSCCToFunctionPassAdaptor::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x3fbfc43)
#26 0x00007fe465bbb584 llvm::PassManager<llvm::LazyCallGraph::SCC, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&>::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x3fbb584)
#27 0x00007fe465bbe22a llvm::DevirtSCCRepeatedPass::run(llvm::LazyCallGraph::SCC&, llvm::AnalysisManager<llvm::LazyCallGraph::SCC, llvm::LazyCallGraph&>&, llvm::LazyCallGraph&, llvm::CGSCCUpdateResult&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x3fbe22a)
#28 0x00007fe465bbcce5 llvm::ModuleToPostOrderCGSCCPassAdaptor::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x3fbcce5)
#29 0x00007fe463fd0c27 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x23d0c27)
#30 0x00007fe4656dd859 llvm::ModuleInlinerWrapperPass::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x3add859)
#31 0x00007fe463fd0c27 llvm::PassManager<llvm::Module, llvm::AnalysisManager<llvm::Module>>::run(llvm::Module&, llvm::AnalysisManager<llvm::Module>&) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x23d0c27)
#32 0x00007fe46a14cba8 (anonymous namespace)::EmitAssemblyHelper::RunOptimizationPipeline(clang::BackendAction, std::__2::unique_ptr<llvm::raw_pwrite_stream, std::__2::default_delete<llvm::raw_pwrite_stream>>&, std::__2::unique_ptr<llvm::ToolOutputFile, std::__2::default_delete<llvm::ToolOutputFile>>&, clang::BackendConsumer*) BackendUtil.cpp:0:0
#33 0x00007fe46a14422b clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::__2::unique_ptr<llvm::raw_pwrite_stream, std::__2::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x2f4422b)
#34 0x00007fe46a4dbb15 clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x32dbb15)
#35 0x00007fe468d027b9 clang::ParseAST(clang::Sema&, bool, bool) (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x1b027b9)
#36 0x00007fe46ad93426 clang::FrontendAction::Execute() (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x3b93426)
#37 0x00007fe46ad0d3fd clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x3b0d3fd)
#38 0x00007fe46ae2e6fd clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x3c2e6fd)
#39 0x00005607cb726cfa cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/emsdk/upstream/bin/clang+++0x12cfa)
#40 0x00005607cb724284 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) driver.cpp:0:0
#41 0x00005607cb7264fd int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::$_0>(long, llvm::SmallVectorImpl<char const*>&) driver.cpp:0:0
#42 0x00007fe46a982b79 void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__2::optional<llvm::StringRef>>, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char>>*, bool*) const::$_0>(long) Job.cpp:0:0
#43 0x00007fe463cc540e llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/emsdk/upstream/bin/../lib/libLLVM.so.22.0git+0x20c540e)
#44 0x00007fe46a981fa3 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__2::optional<llvm::StringRef>>, std::__2::basic_string<char, std::__2::char_traits<char>, std::__2::allocator<char>>*, bool*) const (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x3781fa3)
#45 0x00007fe46a93f2a3 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x373f2a3)
#46 0x00007fe46a93f4fe clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__2::pair<int, clang::driver::Command const*>>&, bool) const (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x373f4fe)
#47 0x00007fe46a9622bf clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__2::pair<int, clang::driver::Command const*>>&) (/opt/emsdk/upstream/bin/../lib/libclang-cpp.so.22.0git+0x37622bf)
#48 0x00005607cb7239e4 clang_main(int, char**, llvm::ToolContext const&) (/opt/emsdk/upstream/bin/clang+++0xf9e4)
#49 0x00005607cb732507 main (/opt/emsdk/upstream/bin/clang+++0x1e507)
#50 0x00007fe461a33ca8 (/lib/x86_64-linux-gnu/libc.so.6+0x29ca8)
#51 0x00007fe461a33d65 __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x29d65)
#52 0x00005607cb721e0a _start (/opt/emsdk/upstream/bin/clang+++0xde0a)
clang++: error: clang frontend command failed with exit code 134 (use -v to see invocation)
clang version 22.0.0git (https:/github.com/llvm/llvm-project c36abf67bb2479fcb3ddee942b5c09c60109500d)
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /opt/emsdk/upstream/bin
Build config: +assertions
clang++: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++: note: diagnostic msg: /tmp/madd-e814f6.cpp
clang++: note: diagnostic msg: /tmp/madd-e814f6.sh
clang++: note: diagnostic msg:

[thedaneeffect]

I'm also seeing an LLVM backend crash with Emscripten 4.0.22, though with a different error during instruction selection rather than the optimizer:

Environment:

• Emscripten 4.0.22-git (clang 22.0.0git)
• macOS 15.6.1 (Apple Silicon / ARM64)
• Project: Godot Engine (commit 6f15a05b)
• Build command: scons platform=web target=template_release

Error:

fatal error: error in backend: Cannot select: 0x106b7da90: v2f64 = insert_vector_elt 0x10685f470, 0x106861b00,
      Constant:i32<1>
  0x10685f470: v2f64 = scalar_to_vector 0x10685d810
    0x10685d810: v2f64,ch = load<(load (s128) from %ir.35, align 8, !tbaa !126)> 0x10610fc18, 0x106862190, undef:i32
      0x106862190: i32 = add nuw 0x106b7e2e0, Constant:i32<8>
        0x106b7e2e0: i32,ch = CopyFromReg 0x10610fc18, Register:i32 %16
  0x106861b00: v2f64 = splat_vector 0x10685f860
    0x10685f860: f64,ch = load<(dereferenceable load (s64) from %ir.31, !tbaa !56)> 0x10610fc18, 0x106fd2470, undef:i32
      0x106fd2470: i32 = add nuw 0x106b7d470, Constant:i32<8>
        0x106b7d470: i32,ch = CopyFromReg 0x10610fc18, Register:i32 %15
In function: _ZN10FLOAT_MATH13MyVertexIndex8getIndexEPKdRb

The crash occurs during WebAssembly instruction selection (pass 4 in stack dump), compiling thirdparty/vhacd/src/FloatMath.cpp with -msimd128 -Os.

Note: The diagnostic report mentioned in the compiler output was not actually saved to disk. The output below and the attached gist contain all available information.

Full build output with stack trace

[ 35%] Compiling thirdparty/vhacd/src/vhacdRaycastMesh.cpp ...
[ 35%] Compiling thirdparty/vhacd/src/VHACD.cpp ...
[ 35%] Compiling thirdparty/vhacd/src/btConvexHullComputer.cpp ...
[ 35%] Compiling thirdparty/libwebp/sharpyuv/sharpyuv.c ...
[ 35%] Compiling thirdparty/libwebp/sharpyuv/sharpyuv_cpu.c ...
fatal error: error in backend: Cannot select: 0x106b7da90: v2f64 = insert_vector_elt 0x10685f470, 0x106861b00,
      Constant:i32<1>
  0x10685f470: v2f64 = scalar_to_vector 0x10685d810
    0x10685d810: v2f64,ch = load<(load (s128) from %ir.35, align 8, !tbaa !126)> 0x10610fc18, 0x106862190, undef:i32
      0x106862190: i32 = add nuw 0x106b7e2e0, Constant:i32<8>
        0x106b7e2e0: i32,ch = CopyFromReg 0x10610fc18, Register:i32 %16
  0x106861b00: v2f64 = splat_vector 0x10685f860
    0x10685f860: f64,ch = load<(dereferenceable load (s64) from %ir.31, !tbaa !56)> 0x10610fc18, 0x106fd2470, undef:i32
      0x106fd2470: i32 = add nuw 0x106b7d470, Constant:i32<8>
        0x106b7d470: i32,ch = CopyFromReg 0x10610fc18, Register:i32 %15
In function: _ZN10FLOAT_MATH13MyVertexIndex8getIndexEPKdRb
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace, preprocessed source, and associated run script.
Stack dump:
0.	Program arguments: /opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang++ -target wasm32-unknown-emscripten -fignore-exceptions -pthread -mllvm -combiner-global-alias-analysis=false -mllvm -wasm-enable-sjlj -mllvm -disable-lsr --sysroot=/opt/homebrew/Cellar/emscripten/4.0.22/libexec/cache/sysroot -D__EMSCRIPTEN_SHARED_MEMORY__=1 -DEMSCRIPTEN -Xclang -iwithsysroot/include/fakesdl -Xclang -iwithsysroot/include/compat -obin/obj/thirdparty/vhacd/src/FloatMath.web.template_release.wasm32.o -c -std=gnu++17 -fno-exceptions -msimd128 -fcolor-diagnostics -Os -w -Wshadow-field-in-constructor -Wshadow-uncaptured-local -Wno-ordered-compare-function-pointers -Wenum-conversion -DNDEBUG -DWEB_ENABLED -DUNIX_ENABLED -DUNIX_SOCKET_UNAVAILABLE -DGLES3_ENABLED -DJAVASCRIPT_EVAL_ENABLED -DPTHREAD_NO_RENAME -DGDSCRIPT_NO_LSP -D_LIBCPP_REMOVE_TRANSITIVE_INCLUDES -DMINIZIP_ENABLED -DBROTLI_ENABLED -DOVERRIDE_ENABLED -DTHREADS_ENABLED -DCLIPPER2_ENABLED -DZSTD_STATIC_LINKING_ONLY -DGODOT_MODULE -Ithirdparty/vhacd/inc -Ithirdparty/libpng -Ithirdparty/zstd -Ithirdparty/zlib -Ithirdparty/clipper2/include -Ithirdparty/brotli/include -Iplatform/web -I. -Imodules/Cellar/emscripten/4.0.22/bin/cache/sysroot/include thirdparty/vhacd/src/FloatMath.cpp
1.	<eof> parser at end of file
2.	Code generation
3.	Running pass 'Function Pass Manager' on module 'thirdparty/vhacd/src/FloatMath.cpp'.
4.	Running pass 'WebAssembly Instruction Selection' on function '@_ZN10FLOAT_MATH13MyVertexIndex8getIndexEPKdRb'
[ 35%] Compiling thirdparty/libwebp/sharpyuv/sharpyuv_csp.c ...
[ 35%] Compiling thirdparty/libwebp/sharpyuv/sharpyuv_dsp.c ...
[ 35%] Compiling thirdparty/libwebp/sharpyuv/sharpyuv_gamma.c ...
[ 35%] Compiling thirdparty/libwebp/sharpyuv/sharpyuv_neon.c ...
[ 35%] Compiling thirdparty/libwebp/sharpyuv/sharpyuv_sse2.c ...
 #0 0x0000000101b51a3c llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100d39a3c)
 #1 0x0000000101b51470 llvm::sys::CleanupOnSignal(unsigned long) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100d39470)
 #2 0x0000000101ad4548 (anonymous namespace)::CrashRecoveryContextImpl::HandleCrash(int, unsigned long) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100cbc548)
 #3 0x0000000101ad44f4 llvm::CrashRecoveryContext::HandleExit(int) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100cbc4f4)
 #4 0x0000000101b4e350 llvm::sys::Process::Exit(int, bool) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100d36350)
 #5 0x0000000100e1d1fc llvm::raw_ostream::SetUnbuffered() (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1000051fc)
 #6 0x0000000101adb4d8 llvm::report_fatal_error(llvm::Twine const&, bool) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100cc34d8)
 #7 0x00000001026fceb0 llvm::SelectionDAGISel::isOrEquivalentToAdd(llvm::SDNode const*) const (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1018e4eb0)
 #8 0x00000001026fc8d0 llvm::SelectionDAGISel::SelectCodeCommon(llvm::SDNode*, unsigned char const*, unsigned int) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1018e48d0)
 #9 0x0000000100e49a0c (anonymous namespace)::WebAssemblyDAGToDAGISel::Select(llvm::SDNode*) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100031a0c)
#10 0x00000001026f66ec llvm::SelectionDAGISel::DoInstructionSelection() (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1018de6ec)
#11 0x00000001026f60c0 llvm::SelectionDAGISel::CodeGenAndEmitDAG() (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1018de0c0)
#12 0x00000001026f5994 llvm::SelectionDAGISel::SelectAllBasicBlocks(llvm::Function const&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1018dd994)
#13 0x00000001026f44f4 llvm::SelectionDAGISel::runOnMachineFunction(llvm::MachineFunction&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1018dc4f4)
#14 0x00000001026f3628 llvm::SelectionDAGISelLegacy::runOnMachineFunction(llvm::MachineFunction&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1018db628)
#15 0x0000000101391e9c llvm::MachineFunctionPass::runOnFunction(llvm::Function&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100579e9c)
#16 0x0000000101603e68 llvm::FPPassManager::runOnFunction(llvm::Function&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1007ebe68)
#17 0x0000000101607038 llvm::FPPassManager::runOnModule(llvm::Module&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1007ef038)
#18 0x000000010160422c llvm::legacy::PassManagerImpl::run(llvm::Module&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1007ec22c)
#19 0x0000000101e32f84 clang::emitBackendOutput(clang::CompilerInstance&, clang::CodeGenOptions&, llvm::StringRef, llvm::Module*, clang::BackendAction, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>, std::__1::unique_ptr<llvm::raw_pwrite_stream, std::__1::default_delete<llvm::raw_pwrite_stream>>, clang::BackendConsumer*) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x10101af84)
#20 0x0000000101ff59cc clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1011dd9cc)
#21 0x00000001027f3bb0 clang::ParseAST(clang::Sema&, bool, bool) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1019dbbb0)
#22 0x00000001022ad1c0 clang::FrontendAction::Execute() (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1014951c0)
#23 0x000000010225da00 clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x101445a00)
#24 0x00000001022fd0a4 clang::ExecuteCompilerInvocation(clang::CompilerInstance*) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x1014e50a4)
#25 0x0000000100e1cc88 cc1_main(llvm::ArrayRef<char const*>, char const*, void*) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100004c88)
#26 0x0000000100e1ac00 ExecuteCC1Tool(llvm::SmallVectorImpl<char const*>&, llvm::ToolContext const&, llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100002c00)
#27 0x0000000100e1c10c int llvm::function_ref<int (llvm::SmallVectorImpl<char const*>&)>::callback_fn<clang_main(int, char**, llvm::ToolContext const&)::$_0>(long, llvm::SmallVectorImpl<char const*>&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x10000410c)
#28 0x000000010214668c void llvm::function_ref<void ()>::callback_fn<clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const::$_0>(long) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x10132e68c)
#29 0x0000000101ad44cc llvm::CrashRecoveryContext::RunSafely(llvm::function_ref<void ()>) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100cbc4cc)
#30 0x00000001021461f0 clang::driver::CC1Command::Execute(llvm::ArrayRef<std::__1::optional<llvm::StringRef>>, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>*, bool*) const (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x10132e1f0)
#31 0x0000000102121fb0 clang::driver::Compilation::ExecuteCommand(clang::driver::Command const&, clang::driver::Command const*&, bool) const (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x101309fb0)
#32 0x00000001021220d4 clang::driver::Compilation::ExecuteJobs(clang::driver::JobList const&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&, bool) const (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x10130a0d4)
#33 0x0000000102132934 clang::driver::Driver::ExecuteCompilation(clang::driver::Compilation&, llvm::SmallVectorImpl<std::__1::pair<int, clang::driver::Command const*>>&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x10131a934)
#34 0x0000000100e1a678 clang_main(int, char**, llvm::ToolContext const&) (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x100002678)
#35 0x0000000100e249c0 main (/opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin/clang-22+0x10000c9c0)
#36 0x0000000185ba6b98
clang++: error: clang frontend command failed with exit code 70 (use -v to see invocation)
clang version 22.0.0git
Target: wasm32-unknown-emscripten
Thread model: posix
InstalledDir: /opt/homebrew/Cellar/emscripten/4.0.22/libexec/llvm/bin
[ 35%] Compiling thirdparty/libwebp/src/dec/alpha_dec.c ...
clang++: note: diagnostic msg:
********************

PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:
Preprocessed source(s) and associated run script(s) are located at:
clang++: note: diagnostic msg: /var/folders/qw/10lgwvn54cz90m7z191fs21c0000gn/T/FloatMath-8c5533.cpp
clang++: note: diagnostic msg: /var/folders/qw/10lgwvn54cz90m7z191fs21c0000gn/T/FloatMath-8c5533.sh
clang++: note: diagnostic msg: Crash backtrace is located in
clang++: note: diagnostic msg: /Users/dane/Library/Logs/DiagnosticReports/clang-22_<YYYY-MM-DD-HHMMSS>_<hostname>.crash
clang++: note: diagnostic msg: (choose the .crash file that corresponds to your crash)
clang++: note: diagnostic msg:

********************
[ 35%] Compiling thirdparty/libwebp/src/dec/buffer_dec.c ...
scons: *** [bin/obj/thirdparty/vhacd/src/FloatMath.web.template_release.wasm32.o] Error 1
scons: building terminated because of errors.
INFO: Time elapsed: 00:01:14.64

Preprocessed source and run script: https://gist.github.com/thedaneeffect/1ecaef7380046ef5de812fa355e6199f

[mr-c]

@ajraymond can you file an issue at https://github.com/llvm/llvm-project/issues/ as well?

[mr-c]

On the emscripten side, I bisected this to ce12ca0792c5f82069733e9d02edc107983d665f → llvm/llvm-project@55eaa6c...88b77d5

[mr-c]

@thedaneeffect I think that is a separate issue, as they pointed out

@ajraymond I went ahead and opened an issue for your bug at llvm/llvm-project#175159

[mr-c]

Fixed upstream in llvm/llvm-project@4996e3b & tested locally by me; I'll wait for the next tot release and confirm here