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Add support to the pattern match library for matching NSW and NUW

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instructions. I needed this for a quick experiment I was making, and
while I've no idea if that will ever get committed, I didn't want to
throw away the pattern match code and for anyone else to have to write
it again. I've added unittests to make sure this works correctly.

In fun news, this also uncovered the IRBuilder bug. Doh!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198541 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chandler Carruth
2014-01-05 03:28:29 +00:00
parent b54a0ac20a
commit 272690897e
2 changed files with 164 additions and 0 deletions
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74
unittests/IR/PatternMatch.cpp
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@ -201,4 +201,78 @@ TEST_F(PatternMatchTest, FloatingPointUnorderedMax) {
EXPECT_EQ(R, MatchR);
}
TEST_F(PatternMatchTest, OverflowingBinOps) {
Value *L = IRB.getInt32(1);
Value *R = IRB.getInt32(2);
Value *MatchL, *MatchR;
EXPECT_TRUE(
m_NSWAdd(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWAdd(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = 0;
EXPECT_TRUE(
m_NSWSub(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWSub(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = 0;
EXPECT_TRUE(
m_NSWMul(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNSWMul(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = 0;
EXPECT_TRUE(m_NSWShl(m_Value(MatchL), m_Value(MatchR)).match(
IRB.CreateShl(L, R, "", /* NUW */ false, /* NSW */ true)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
EXPECT_TRUE(
m_NUWAdd(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWAdd(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = 0;
EXPECT_TRUE(
m_NUWSub(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWSub(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = 0;
EXPECT_TRUE(
m_NUWMul(m_Value(MatchL), m_Value(MatchR)).match(IRB.CreateNUWMul(L, R)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
MatchL = MatchR = 0;
EXPECT_TRUE(m_NUWShl(m_Value(MatchL), m_Value(MatchR)).match(
IRB.CreateShl(L, R, "", /* NUW */ true, /* NSW */ false)));
EXPECT_EQ(L, MatchL);
EXPECT_EQ(R, MatchR);
EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateAdd(L, R)));
EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
EXPECT_FALSE(m_NSWAdd(m_Value(), m_Value()).match(IRB.CreateNSWSub(L, R)));
EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateSub(L, R)));
EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateNUWSub(L, R)));
EXPECT_FALSE(m_NSWSub(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateMul(L, R)));
EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateNUWMul(L, R)));
EXPECT_FALSE(m_NSWMul(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(IRB.CreateShl(L, R)));
EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(
IRB.CreateShl(L, R, "", /* NUW */ true, /* NSW */ false)));
EXPECT_FALSE(m_NSWShl(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateAdd(L, R)));
EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateNSWAdd(L, R)));
EXPECT_FALSE(m_NUWAdd(m_Value(), m_Value()).match(IRB.CreateNUWSub(L, R)));
EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateSub(L, R)));
EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateNSWSub(L, R)));
EXPECT_FALSE(m_NUWSub(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateMul(L, R)));
EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateNSWMul(L, R)));
EXPECT_FALSE(m_NUWMul(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(IRB.CreateShl(L, R)));
EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(
IRB.CreateShl(L, R, "", /* NUW */ false, /* NSW */ true)));
EXPECT_FALSE(m_NUWShl(m_Value(), m_Value()).match(IRB.CreateNUWAdd(L, R)));
}
} // anonymous namespace.