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"""
Test PHI nodes work in the IR interpreter.
"""
import lldb
from lldbsuite.test.lldbtest import *
import lldbsuite.test.lldbutil as lldbutil
class IRInterpreterPHINodesTestCase(TestBase):
mydir = TestBase.compute_mydir(__file__)
def test_phi_node_support(self):
"""Test support for PHI nodes in the IR interpreter."""
self.build()
exe = self.getBuildArtifact("a.out")
self.runCmd('file ' + exe, CURRENT_EXECUTABLE_SET)
# Break on the first assignment to i
line = line_number('main.cpp', 'i = 5')
lldbutil.run_break_set_by_file_and_line(
self, 'main.cpp', line, num_expected_locations=1, loc_exact=True)
self.runCmd('run', RUN_SUCCEEDED)
# The stop reason of the thread should be breakpoint
self.expect('thread list', STOPPED_DUE_TO_BREAKPOINT,
substrs=['stopped', 'stop reason = breakpoint'])
self.runCmd('s')
# The logical 'or' causes a PHI node to be generated. Execute without JIT
# to test that the interpreter can handle this
self.expect('expr -j 0 -- i == 3 || i == 5', substrs=['true'])
self.runCmd('s')
self.expect('expr -j 0 -- i == 3 || i == 5', substrs=['false'])
self.runCmd('s')
self.expect('expr -j 0 -- i == 3 || i == 5', substrs=['true'])
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