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LLVM 21.1-rc1 Released For Testing: Better RISC-V Support, AMD GFX1250 & NVIDIA GB10
The first release candidate of LLVM 21.1 is now available for testing, which under their modern versioning scheme will represent the first stable version of the LLVM 21 compiler stack.
LLVM 21 introduces the AMD GFX1250 target for what is expected to be an APU with an RDNA4 refresh (RDNA 4.5?) There are also other AMDGPU LLVM back-end enhancements for helping their ROCm stack and other libc-for-GPU efforts. On the Clang 21 C/C++ compiler front-end side there are new LLVM optimizations around pointer arithmetic on null pointers, new C++2c feature additions, various other C++ language features added, new C warnings, additional C2y feature work, and many compiler diagnostic enhancements.
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