add tests for NVPTX backend

closes rust-lang#9

src/test/run-make/nvptx/Makefile

@@ -0,0 +1,32 @@
+-include ../tools.mk
+
+NVPTX = nvptx-unknown-unknown
+NVPTX64 = nvptx64-unknown-unknown
+
+all: smoke syncthreads thread_idx
+
+smoke:
+	$(RUSTC) --target $(NVPTX) --emit=asm $@.rs
+	grep '\.address_size *32' $(TMPDIR)/$@.s
+	$(RUSTC) --target $(NVPTX64) --emit=asm $@.rs
+	grep '\.address_size *64' $(TMPDIR)/$@.s
+
+syncthreads:
+	$(RUSTC) --target $(NVPTX) --emit=llvm-ir $@.rs
+	grep 'call.*syncthreads' $(TMPDIR)/$@.ll
+	$(RUSTC) --target $(NVPTX64) --emit=llvm-ir $@.rs
+	grep 'call.*syncthreads' $(TMPDIR)/$@.ll
+	$(RUSTC) --target $(NVPTX) --emit=asm $@.rs
+	grep 'bar\.sync' $(TMPDIR)/$@.s
+	$(RUSTC) --target $(NVPTX64) --emit=asm $@.rs
+	grep 'bar\.sync' $(TMPDIR)/$@.s
+
+thread_idx:
+	$(RUSTC) --target $(NVPTX) --emit=llvm-ir $@.rs
+	grep 'call.*tid\.x' $(TMPDIR)/$@.ll
+	$(RUSTC) --target $(NVPTX64) --emit=llvm-ir $@.rs
+	grep 'call.*tid\.x' $(TMPDIR)/$@.ll
+	$(RUSTC) --target $(NVPTX) --emit=asm $@.rs
+	grep '%tid\.x' $(TMPDIR)/$@.s
+	$(RUSTC) --target $(NVPTX64) --emit=asm $@.rs
+	grep '%tid\.x' $(TMPDIR)/$@.s

src/test/run-make/nvptx/smoke.rs

@@ -0,0 +1,5 @@
+#![feature(lang_items)]
+#![feature(no_core)]
+#![feature(platform_intrinsics)]
+
+#![no_core]

src/test/run-make/nvptx/syncthreads.rs

@@ -0,0 +1,23 @@
+#![feature(lang_items)]
+#![feature(no_core)]
+#![feature(platform_intrinsics)]
+
+#![no_core]
+
+#![allow(dead_code)]
+
+extern "platform-intrinsic" {
+    fn nvptx_syncthreads();
+}
+
+fn syncthreads() {
+    unsafe {
+        nvptx_syncthreads();
+    }
+}
+
+#[lang = "copy"]
+trait Copy {}
+
+#[lang = "sized"]
+trait Sized {}

src/test/run-make/nvptx/thread_idx.rs

@@ -0,0 +1,23 @@
+#![feature(lang_items)]
+#![feature(no_core)]
+#![feature(platform_intrinsics)]
+
+#![no_core]
+
+#![allow(dead_code)]
+
+extern "platform-intrinsic" {
+    fn nvptx_thread_idx_x() -> i32;
+}
+
+fn thread_idx() -> i32 {
+    unsafe {
+        nvptx_thread_idx_x()
+    }
+}
+
+#[lang = "copy"]
+trait Copy {}
+
+#[lang = "sized"]
+trait Sized {}