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Fix for rematerializer.

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This commit is contained in:
chriseth 2018-02-01 16:55:59 +01:00
parent 22c4d282aa
commit e100af592b
2 changed files with 16 additions and 0 deletions
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4
libjulia/optimiser/Rematerialiser.cpp
View File

@ -136,6 +136,10 @@ void Rematerialiser::handleAssignment(set<string> const& _variables, Expression*
else
m_substitutions.erase(name);
}
else
for (auto const& name: _variables)
m_substitutions.erase(name);
// Disallow substitutions that use a variable that will be reassigned by this assignment.
for (auto const& name: _variables)
for (auto const& ref: m_referencedBy[name])

12
test/libjulia/Rematerialiser.cpp
View File

@ -118,6 +118,18 @@ BOOST_AUTO_TEST_CASE(branches_for)
);
}
BOOST_AUTO_TEST_CASE(branches_for_declared_in_init)
{
CHECK(
"{ let b := 0 for { let a := 1 pop(a) } a { pop(a) } { b := 1 pop(a) } }",
"{ let b := 0 for { let a := 1 pop(1) } 1 { pop(1) } { b := 1 pop(1) } }"
);
CHECK(
"{ let b := 0 for { let a := 1 pop(a) } lt(a, 0) { pop(a) a := add(a, 3) } { b := 1 pop(a) } }",
"{ let b := 0 for { let a := 1 pop(1) } lt(a, 0) { pop(a) a := add(a, 3) } { b := 1 pop(a) } }"
);
}
BOOST_AUTO_TEST_CASE(reassignment)
{
CHECK(