add amd llvm compiler (#9519)

Co-authored-by: b1tg <b1tg@users.noreply.github.com>
Co-authored-by: chenyu <chenyu@fastmail.com>

test/test_amd_llvm.py

@@ -0,0 +1,32 @@
+import unittest
+import numpy as np
+from tinygrad import Device
+from tinygrad.helpers import flat_mv
+if Device.DEFAULT=="AMD":
+  from tinygrad.runtime.ops_amd import AMDAllocator, AMDDevice, AMDProgram
+  from tinygrad.runtime.support.compiler_amd import AMDLLVMCompiler
+
+@unittest.skipUnless(Device.DEFAULT == "AMD", "Runs only on AMD")
+class TestAMDLLVM(unittest.TestCase):
+  def test_compiler(self):
+    src = '''
+; https://github.com/llvm/llvm-project/blob/main/llvm/test/CodeGen/AMDGPU/imm.ll
+define amdgpu_kernel void @i64_imm_inline_lo(ptr addrspace(1) %out) {
+entry:
+  store i64 1311768464867721221, ptr addrspace(1) %out ; 0x1234567800000005
+  ret void
+}
+    '''
+    device = AMDDevice()
+    compiler = AMDLLVMCompiler("gfx1100")
+    obj = compiler.compile(src)
+    allocator = AMDAllocator(device)
+    a = allocator.alloc(1*8)
+    prog = AMDProgram(device, "test", obj)
+    prog(a, wait=True)
+    na = np.empty(1, np.uint64)
+    allocator._copyout(flat_mv(na.data), a)
+    assert na == [0x1234567800000005]
+
+if __name__ == '__main__':
+  unittest.main()