riscv: run tests in QEMU

Not everything is supported right now, but these tests should make sure
that things that work now won't break in the future.

Author: aykevl

.circleci/config.yml

@@ -262,7 +262,9 @@ commands:
             ln -s $PWD/llvm-build/bin/clang-9 /usr/local/bin/clang-9
       - run:
           name: "Test TinyGo"
-          command: make test
+          command: |
+            make gen-device-sifive # needed for testing
+            make test
       - run:
           name: "Build TinyGo release"
           command: |

azure-pipelines.yml

@@ -52,6 +52,8 @@ jobs:
         script: |
           export PATH="/c/Go1.13/bin:$PATH:./llvm-build/bin:/c/Program Files/qemu"
           unset GOROOT
+          make gen-device-sifive # needed for testing
+          qemu-system-riscv32 --version
           make test
     - task: Bash@3
       displayName: Build TinyGo release tarball

main_test.go

@@ -53,6 +53,12 @@ func TestCompiler(t *testing.T) {
 		runPlatTests("cortex-m-qemu", matches, t)
 	})
 
+	if runtime.GOOS == "windows" {
+		t.Run("EmulatedHiFive1", func(t *testing.T) {
+			runPlatTests("hifive1-qemu", matches, t)
+		})
+	}
+
 	if runtime.GOOS == "linux" {
 		t.Run("ARMLinux", func(t *testing.T) {
 			runPlatTests("arm--linux-gnueabihf", matches, t)
@@ -78,6 +84,15 @@ func runPlatTests(target string, matches []string, t *testing.T) {
 			// run all tests on host
 		case target == "cortex-m-qemu":
 			// all tests are supported
+		case target == "hifive1-qemu":
+			if path == filepath.Join("testdata", "coroutines.go") || path == filepath.Join("testdata", "channel.go") || path == filepath.Join("testdata", "interface.go") {
+				// time.Sleep does not work yet in QEMU?
+				continue
+			}
+			if path == filepath.Join("testdata", "cgo")+string(filepath.Separator) {
+				// CGo doesn't work yet for some reason.
+				continue
+			}
 		default:
 			// cross-compilation of cgo is not yet supported
 			if path == filepath.Join("testdata", "cgo")+string(filepath.Separator) {