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ISPC 1.31 AVX-512 miscompile: masked load sunk below masked store

LLVM bugBug in LLVMBug in LLVM

Status: Open.

Bug

#3891 In ispc/ispc;

· johguenther opened on Aug 10, 2026

Add AMD Zen6 CPU definition

Status: Open.

Enhancement

#3889 In ispc/ispc;

· nurmukhametov opened on Aug 3, 2026

Feature: Disable hardcoded 32-bit ARM builtins & remove linux asm/types.h kernel header dependency

Building CompilerIssues with build scripts & building the compiler on Windows and LinuxIssues with build scripts & building the compiler on Windows and Linux

Status: Open.

Enhancement

#3887 In ispc/ispc;

· 1234562026 opened on Jul 20, 2026

Surface run_tests.py diagnostics in alloy.py build logs when tests fail

CI / GitHub ActionsAll issues involving build automation and GitHub actions.All issues involving build automation and GitHub actions.

Status: Open.

Task

#3868 In ispc/ispc;

· aneshlya opened on Jun 23, 2026

Build silently continues when builtins-c-cpu.cpp fails to compile for certain targets

Building CompilerIssues with build scripts & building the compiler on Windows and LinuxIssues with build scripts & building the compiler on Windows and Linux

Status: Open.

Bug

#3845 In ispc/ispc;

· aneshlya opened on May 21, 2026

Handle 0...MACRO foreach range normalization in included files

Frontend / ParserLexing, parsing, type checking, semantic analysis, type system, language-syntax gaps.Lexing, parsing, type checking, semantic analysis, type system, language-syntax gaps.

Status: Open.

Bug

#3839 In ispc/ispc;

· azwolski opened on May 21, 2026

Wrong type in __count_leading_zeros_varying_i64 in generic.ispc

QuestionGeneral questions.General questions.

Standard LibraryStandard library problems and improvementsStandard library problems and improvements

Status: Open.

#3833 In ispc/ispc;

· zephyr111 opened on May 15, 2026

Vulkan interop for xpu examples and Intel GPUs?

GPUGPU related issuesGPU related issues

QuestionGeneral questions.General questions.

Runtime / TasksTask system (tasksys.cpp), ispcrt runtime, memory management/allocation.Task system (tasksys.cpp), ispcrt runtime, memory management/allocation.

Status: Open.

Enhancement

#3820 In ispc/ispc;

· procedural opened on May 3, 2026

Improve the precision of the sin function

Standard LibraryStandard library problems and improvementsStandard library problems and improvements

Status: Open.

Bug

#3817 In ispc/ispc;

· zephyr111 opened on May 1, 2026

Allow distinguishing fast-math vs default-math library in functional tests

CI / GitHub ActionsAll issues involving build automation and GitHub actions.All issues involving build automation and GitHub actions.

Standard LibraryStandard library problems and improvementsStandard library problems and improvements

Status: Open.

Task

#3815 In ispc/ispc;

· aneshlya opened on Apr 28, 2026

Redefining stdlib functions

Frontend / ParserLexing, parsing, type checking, semantic analysis, type system, language-syntax gaps.Lexing, parsing, type checking, semantic analysis, type system, language-syntax gaps.

Quality of LifeThings that improve the quality of experience when using the compiler.Things that improve the quality of experience when using the compiler.

Standard LibraryStandard library problems and improvementsStandard library problems and improvements

Status: Open.

Bug

#3812 In ispc/ispc;

· zephyr111 opened on Apr 26, 2026

Possible performance loss with inlined functions

CodegenCode generation: instruction selection, lowering, control-flow & x86/SSE/AVX target codegen.Code generation: instruction selection, lowering, control-flow & x86/SSE/AVX target codegen.

PerformanceAll issues related to performance/code generationAll issues related to performance/code generation

Standard LibraryStandard library problems and improvementsStandard library problems and improvements

Status: Open.

Enhancement

#3804 In ispc/ispc;

· zephyr111 opened on Apr 23, 2026