start creating lit infrastructure

Author: vchuravy

atomics.jl

@@ -21,7 +21,7 @@ job, _ = PTX.create_job(identity, (Int,))
 includet("src/atomic_legalization.jl")
 
 # mod = """
-# define void @test(ptr %a) nounwind {
+# define void @test(ptr %a) nounwind {git
 #   %1 = load atomic i128, ptr %a seq_cst, align 16
 #   store atomic i128 %1, ptr %a seq_cst, align 16
 #   ret void

test/codegen/PTX/atomics-i128.ll

@@ -0,0 +1,5 @@
+define void @test(ptr %a) nounwind {git
+  %1 = load atomic i128, ptr %a seq_cst, align 16
+  store atomic i128 %1, ptr %a seq_cst, align 16
+  ret void
+}

test/codegen/gpuc.jl

@@ -0,0 +1,29 @@
+using GPUCompiler
+import LLVM
+
+if !GPUCompiler.__llvm_initialized[]
+    InitializeAllTargets()
+    InitializeAllTargetInfos()
+    InitializeAllAsmPrinters()
+    InitializeAllAsmParsers()
+    InitializeAllTargetMCs()
+    GPUCompiler.__llvm_initialized[] = true
+end
+
+# include all helpers
+include(joinpath(@__DIR__, "..", "helpers", "runtime.jl"))
+for file in readdir(joinpath(@__DIR__, "..", "helpers"))
+    if endswith(file, ".jl") && file != "runtime.jl"
+        include(joinpath(@__DIR__, "..", "helpers", file))
+    end
+end
+
+# TODO: Use ARGS to get target
+job, _ = PTX.create_job(identity, (Int,))
+
+asm, meta = JuliaContext(opaque_pointers=true) do ctx
+    ir = parse(LLVM.Module, readfile(ARGS[end]))
+    GPUCompiler.emit_asm(job, ir, LLVM.API.LLVMAssemblyFile)
+end
+
+write(stdout, asm)