Adding upstream version 1.16.10.upstream/1.16.10upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 151 insertions, 0 deletions

diff --git a/src/cmd/internal/obj/riscv/asm_test.go b/src/cmd/internal/obj/riscv/asm_test.go
new file mode 100644
index 0000000..f8f7b4f
--- /dev/null
+++ b/src/cmd/internal/obj/riscv/asm_test.go
@@ -0,0 +1,151 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package riscv
+
+import (
+	"bytes"
+	"fmt"
+	"internal/testenv"
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"testing"
+)
+
+// TestLarge generates a very large file to verify that large
+// program builds successfully, in particular, too-far
+// conditional branches are fixed.
+func TestLarge(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skip in short mode")
+	}
+	testenv.MustHaveGoBuild(t)
+
+	dir, err := ioutil.TempDir("", "testlarge")
+	if err != nil {
+		t.Fatalf("could not create directory: %v", err)
+	}
+	defer os.RemoveAll(dir)
+
+	// Generate a very large function.
+	buf := bytes.NewBuffer(make([]byte, 0, 7000000))
+	gen(buf)
+
+	tmpfile := filepath.Join(dir, "x.s")
+	err = ioutil.WriteFile(tmpfile, buf.Bytes(), 0644)
+	if err != nil {
+		t.Fatalf("can't write output: %v\n", err)
+	}
+
+	// Build generated file.
+	cmd := exec.Command(testenv.GoToolPath(t), "tool", "asm", "-o", filepath.Join(dir, "x.o"), tmpfile)
+	cmd.Env = append(os.Environ(), "GOARCH=riscv64", "GOOS=linux")
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		t.Errorf("Build failed: %v, output: %s", err, out)
+	}
+}
+
+// gen generates a very large program, with a very far conditional branch.
+func gen(buf *bytes.Buffer) {
+	fmt.Fprintln(buf, "TEXT f(SB),0,$0-0")
+	fmt.Fprintln(buf, "BEQ X0, X0, label")
+	for i := 0; i < 1<<19; i++ {
+		fmt.Fprintln(buf, "ADD $0, X0, X0")
+	}
+	fmt.Fprintln(buf, "label:")
+	fmt.Fprintln(buf, "ADD $0, X0, X0")
+}
+
+// Issue 20348.
+func TestNoRet(t *testing.T) {
+	dir, err := ioutil.TempDir("", "testnoret")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
+	tmpfile := filepath.Join(dir, "x.s")
+	if err := ioutil.WriteFile(tmpfile, []byte("TEXT ·stub(SB),$0-0\nNOP\n"), 0644); err != nil {
+		t.Fatal(err)
+	}
+	cmd := exec.Command(testenv.GoToolPath(t), "tool", "asm", "-o", filepath.Join(dir, "x.o"), tmpfile)
+	cmd.Env = append(os.Environ(), "GOARCH=riscv64", "GOOS=linux")
+	if out, err := cmd.CombinedOutput(); err != nil {
+		t.Errorf("%v\n%s", err, out)
+	}
+}
+
+func TestImmediateSplitting(t *testing.T) {
+	dir, err := ioutil.TempDir("", "testimmsplit")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(dir)
+	tmpfile := filepath.Join(dir, "x.s")
+	asm := `
+TEXT _stub(SB),$0-0
+	LB	4096(X5), X6
+	LH	4096(X5), X6
+	LW	4096(X5), X6
+	LD	4096(X5), X6
+	LBU	4096(X5), X6
+	LHU	4096(X5), X6
+	LWU	4096(X5), X6
+	SB	X6, 4096(X5)
+	SH	X6, 4096(X5)
+	SW	X6, 4096(X5)
+	SD	X6, 4096(X5)
+
+	FLW	4096(X5), F6
+	FLD	4096(X5), F6
+	FSW	F6, 4096(X5)
+	FSD	F6, 4096(X5)
+
+	MOVB	4096(X5), X6
+	MOVH	4096(X5), X6
+	MOVW	4096(X5), X6
+	MOV	4096(X5), X6
+	MOVBU	4096(X5), X6
+	MOVHU	4096(X5), X6
+	MOVWU	4096(X5), X6
+
+	MOVB	X6, 4096(X5)
+	MOVH	X6, 4096(X5)
+	MOVW	X6, 4096(X5)
+	MOV	X6, 4096(X5)
+
+	MOVF	4096(X5), F6
+	MOVD	4096(X5), F6
+	MOVF	F6, 4096(X5)
+	MOVD	F6, 4096(X5)
+`
+	if err := ioutil.WriteFile(tmpfile, []byte(asm), 0644); err != nil {
+		t.Fatal(err)
+	}
+	cmd := exec.Command(testenv.GoToolPath(t), "tool", "asm", "-o", filepath.Join(dir, "x.o"), tmpfile)
+	cmd.Env = append(os.Environ(), "GOARCH=riscv64", "GOOS=linux")
+	if out, err := cmd.CombinedOutput(); err != nil {
+		t.Errorf("%v\n%s", err, out)
+	}
+}
+
+func TestBranch(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skipping in short mode")
+	}
+	if runtime.GOARCH != "riscv64" {
+		t.Skip("Requires riscv64 to run")
+	}
+
+	testenv.MustHaveGoBuild(t)
+
+	cmd := exec.Command(testenv.GoToolPath(t), "test")
+	cmd.Dir = "testdata/testbranch"
+	if out, err := testenv.CleanCmdEnv(cmd).CombinedOutput(); err != nil {
+		t.Errorf("Branch test failed: %v\n%s", err, out)
+	}
+}