test: retry llgo test to avoid clang error

compiler/cmd/llgo/llgo_test.go

@@ -212,32 +212,37 @@ func main() {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
+			var testErr error
+			for attempt := 0; attempt < 2; attempt++ {
+				testErr = func() error {
 					// Create a new test directory for each test case
 					tmpDir := setupTestProject(t)
 					defer os.RemoveAll(tmpDir)
 
 					// Change to test project directory
 					if err := os.Chdir(tmpDir); err != nil {
-				t.Fatalf("Failed to change directory: %v", err)
+						return fmt.Errorf("Failed to change directory: %v", err)
 					}
 
 					if tt.setup != nil {
 						if err := tt.setup(tmpDir); err != nil {
-					t.Fatalf("Failed to setup test: %v", err)
+							return fmt.Errorf("Failed to setup test: %v", err)
 						}
 					}
 
 					mockable.EnableMock()
+					var exitErr error
+					func() {
 						defer func() {
 							if r := recover(); r != nil {
 								if r != "exit" {
 									if !tt.wantErr {
-							t.Errorf("unexpected panic: %v", r)
+										exitErr = fmt.Errorf("unexpected panic: %v", r)
 									}
 								} else {
 									exitCode := mockable.ExitCode()
 									if (exitCode != 0) != tt.wantErr {
-							t.Errorf("got exit code %d, wantErr %v", exitCode, tt.wantErr)
+										exitErr = fmt.Errorf("got exit code %d, wantErr %v", exitCode, tt.wantErr)
 									}
 								}
 							}
@@ -245,6 +250,10 @@ func main() {
 
 						os.Args = tt.args
 						main()
+					}()
+					if exitErr != nil {
+						return exitErr
+					}
 
 					// For build/install commands, check if binary was created
 					if strings.HasPrefix(tt.name, "build") || strings.HasPrefix(tt.name, "install") {
@@ -266,9 +275,24 @@ func main() {
 							binPath = filepath.Join(tmpDir, binName)
 						}
 						if _, err := os.Stat(binPath); os.IsNotExist(err) {
-					t.Errorf("Binary %s was not created at %s", binName, binPath)
+							return fmt.Errorf("Binary %s was not created at %s", binName, binPath)
 						}
 					}
+					return nil
+				}()
+
+				if testErr == nil {
+					break
+				}
+
+				if attempt == 0 {
+					t.Logf("Test failed on first attempt: %v. Retrying...", testErr)
+				}
+			}
+
+			if testErr != nil {
+				t.Error(testErr)
+			}
 		})
 	}
 }