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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):
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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