1"""
2Test PHI nodes work in the IR interpreter.
3"""
4
5
6import lldb
7from lldbsuite.test.lldbtest import *
8import lldbsuite.test.lldbutil as lldbutil
9
10
11class IRInterpreterPHINodesTestCase(TestBase):
12
13    def test_phi_node_support(self):
14        """Test support for PHI nodes in the IR interpreter."""
15
16        self.build()
17        exe = self.getBuildArtifact("a.out")
18        self.runCmd('file ' + exe, CURRENT_EXECUTABLE_SET)
19
20        # Break on the first assignment to i
21        line = line_number('main.cpp', 'i = 5')
22        lldbutil.run_break_set_by_file_and_line(
23            self, 'main.cpp', line, num_expected_locations=1, loc_exact=True)
24
25        self.runCmd('run', RUN_SUCCEEDED)
26
27        # The stop reason of the thread should be breakpoint
28        self.expect('thread list', STOPPED_DUE_TO_BREAKPOINT,
29                    substrs=['stopped', 'stop reason = breakpoint'])
30
31        self.runCmd('s')
32
33        # The logical 'or' causes a PHI node to be generated. Execute without JIT
34        # to test that the interpreter can handle this
35        self.expect('expr -j 0 -- i == 3 || i == 5', substrs=['true'])
36
37        self.runCmd('s')
38        self.expect('expr -j 0 -- i == 3 || i == 5', substrs=['false'])
39        self.runCmd('s')
40        self.expect('expr -j 0 -- i == 3 || i == 5', substrs=['true'])
41