[Clang][AMDGPU] Clang crashes on `__builtin_coro_noop` when targeting AMDGPU

[jhuber6]

Any use of __builtin_coro_noop will cause the AMDGPU target to crash with an invalid constexpr crash. The NVPTX and other targets handle this just fine. https://godbolt.org/z/9E18bG3d6

void foo() {
    __builtin_coro_noop();
}

$ clang++ -std=v++23 --target=amdgcn-amd-amdhsa bug.cpp
clang++: /root/llvm-project/llvm/lib/IR/Constants.cpp:2191: static llvm::Constant* llvm::ConstantExpr::getCast(unsigned int, llvm::Constant*, llvm::Type*, bool): Assertion `CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!"' 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.

[llvmbot]

@llvm/issue-subscribers-coroutines

Author: Joseph Huber (jhuber6)

Any use of `__builtin_coro_noop` will cause the AMDGPU target to crash with an invalid constexpr crash. The NVPTX and other targets handle this just fine. https://godbolt.org/z/9E18bG3d6

void foo() {
    __builtin_coro_noop();
}

$ clang++ -std=v++23 --target=amdgcn-amd-amdhsa bug.cpp
clang++: /root/llvm-project/llvm/lib/IR/Constants.cpp:2191: static llvm::Constant* llvm::ConstantExpr::getCast(unsigned int, llvm::Constant*, llvm::Type*, bool): Assertion `CastInst::castIsValid(opc, C, Ty) && "Invalid constantexpr cast!"' 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.