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[NFC] [ValueTracking] Add unittest for haveNoCommonBitsSet

This commit is contained in:
Chuanqi Xu 2022-02-14 14:09:26 +08:00
parent 3e19ba36fc
commit 4ee240b860
1 changed files with 22 additions and 0 deletions
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22
llvm/unittests/Analysis/ValueTrackingTest.cpp
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@ -1725,6 +1725,28 @@ TEST_F(ComputeKnownBitsTest, ComputeKnownBitsCrash) {
A, M->getDataLayout(), /* Depth */ 0, &AC, F->front().getTerminator());
}
TEST_F(ValueTrackingTest, HaveNoCommonBitsSet) {
{
// Check for an inverted mask: (X & ~M) op (Y & M).
auto M = parseModule(R"(
define i32 @test(i32 %X, i32 %Y, i32 %M) {
%1 = xor i32 %M, -1
%LHS = and i32 %1, %X
%RHS = and i32 %Y, %M
%Ret = add i32 %LHS, %RHS
ret i32 %Ret
})");
F = M->getFunction("test");
auto *LHS = findInstructionByNameOrNull(F, "LHS");
auto *RHS = findInstructionByNameOrNull(F, "RHS");
const DataLayout &DL = M->getDataLayout();
EXPECT_TRUE(haveNoCommonBitsSet(LHS, RHS, DL));
EXPECT_TRUE(haveNoCommonBitsSet(RHS, LHS, DL));
}
}
class IsBytewiseValueTest : public ValueTrackingTest,
public ::testing::WithParamInterface<
std::pair<const char *, const char *>> {