[PatternMatch] Generalize m_SpecificInt_ULT() to take ICmpInst::Predicate

As discussed in the original review, this may be useful,
so let's just do it.

llvm-svn: 365652

4 files changed, 417 insertions, 20 deletions

diff --git a/llvm/include/llvm/IR/PatternMatch.h b/llvm/include/llvm/IR/PatternMatch.h
index 1a11af27d1a..0f03d7cc56b 100644
--- a/llvm/include/llvm/IR/PatternMatch.h
+++ b/llvm/include/llvm/IR/PatternMatch.h
@@ -418,16 +418,42 @@ inline cst_pred_ty<is_lowbit_mask> m_LowBitMask() {
   return cst_pred_ty<is_lowbit_mask>();
 }
 
-struct is_unsigned_less_than {
+struct icmp_pred_with_threshold {
+  ICmpInst::Predicate Pred;
   const APInt *Thr;
-  bool isValue(const APInt &C) { return C.ult(*Thr); }
-};
-/// Match an integer or vector with every element unsigned less than the
-/// Threshold. For vectors, this includes constants with undefined elements.
-/// FIXME: is it worth generalizing this to simply take ICmpInst::Predicate?
-inline cst_pred_ty<is_unsigned_less_than>
-m_SpecificInt_ULT(const APInt &Threshold) {
-  cst_pred_ty<is_unsigned_less_than> P;
+  bool isValue(const APInt &C) {
+    switch (Pred) {
+    case ICmpInst::Predicate::ICMP_EQ:
+      return C.eq(*Thr);
+    case ICmpInst::Predicate::ICMP_NE:
+      return C.ne(*Thr);
+    case ICmpInst::Predicate::ICMP_UGT:
+      return C.ugt(*Thr);
+    case ICmpInst::Predicate::ICMP_UGE:
+      return C.uge(*Thr);
+    case ICmpInst::Predicate::ICMP_ULT:
+      return C.ult(*Thr);
+    case ICmpInst::Predicate::ICMP_ULE:
+      return C.ule(*Thr);
+    case ICmpInst::Predicate::ICMP_SGT:
+      return C.sgt(*Thr);
+    case ICmpInst::Predicate::ICMP_SGE:
+      return C.sge(*Thr);
+    case ICmpInst::Predicate::ICMP_SLT:
+      return C.slt(*Thr);
+    case ICmpInst::Predicate::ICMP_SLE:
+      return C.sle(*Thr);
+    default:
+      llvm_unreachable("Unhandled ICmp predicate");
+    }
+  }
+};
+/// Match an integer or vector with every element comparing 'pred' (eg/ne/...)
+/// to Threshold. For vectors, this includes constants with undefined elements.
+inline cst_pred_ty<icmp_pred_with_threshold>
+m_SpecificInt_ICMP(ICmpInst::Predicate Predicate, const APInt &Threshold) {
+  cst_pred_ty<icmp_pred_with_threshold> P;
+  P.Pred = Predicate;
   P.Thr = &Threshold;
   return P;
 }
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
index 4c818193ced..3a4283ae540 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
@@ -3316,7 +3316,8 @@ foldShiftIntoShiftInAnotherHandOfAndInICmp(ICmpInst &I, const SimplifyQuery SQ,
   // Is the new shift amount smaller than the bit width?
   // FIXME: could also rely on ConstantRange.
   unsigned BitWidth = X->getType()->getScalarSizeInBits();
-  if (!match(NewShAmt, m_SpecificInt_ULT(APInt(BitWidth, BitWidth))))
+  if (!match(NewShAmt, m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT,
+                                          APInt(BitWidth, BitWidth))))
     return nullptr;
   // All good, we can do this fold. The shift is the same that was for X.
   Value *T0 = XShiftOpcode == Instruction::BinaryOps::LShr
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
index 0bbecde2184..c821292400c 100644
--- a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
+++ b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp
@@ -48,7 +48,8 @@ reassociateShiftAmtsOfTwoSameDirectionShifts(BinaryOperator *Sh0,
   // Is the new shift amount smaller than the bit width?
   // FIXME: could also rely on ConstantRange.
   unsigned BitWidth = X->getType()->getScalarSizeInBits();
-  if (!match(NewShAmt, m_SpecificInt_ULT(APInt(BitWidth, BitWidth))))
+  if (!match(NewShAmt, m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT,
+                                          APInt(BitWidth, BitWidth))))
     return nullptr;
   // All good, we can do this fold.
   BinaryOperator *NewShift = BinaryOperator::Create(ShiftOpcode, X, NewShAmt);
diff --git a/llvm/unittests/IR/PatternMatch.cpp b/llvm/unittests/IR/PatternMatch.cpp
index 8ea7a68b27c..600494fba26 100644
--- a/llvm/unittests/IR/PatternMatch.cpp
+++ b/llvm/unittests/IR/PatternMatch.cpp
@@ -64,6 +64,162 @@ TEST_F(PatternMatchTest, OneUse) {
   EXPECT_FALSE(m_OneUse(m_Value()).match(Leaf));
 }
 
+TEST_F(PatternMatchTest, SpecificIntEQ) {
+  Type *IntTy = IRB.getInt32Ty();
+  unsigned BitWidth = IntTy->getScalarSizeInBits();
+
+  Value *Zero = ConstantInt::get(IntTy, 0);
+  Value *One = ConstantInt::get(IntTy, 1);
+  Value *NegOne = ConstantInt::get(IntTy, -1);
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 0))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, 1))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_EQ, APInt(BitWidth, -1))
+          .match(NegOne));
+}
+
+TEST_F(PatternMatchTest, SpecificIntNE) {
+  Type *IntTy = IRB.getInt32Ty();
+  unsigned BitWidth = IntTy->getScalarSizeInBits();
+
+  Value *Zero = ConstantInt::get(IntTy, 0);
+  Value *One = ConstantInt::get(IntTy, 1);
+  Value *NegOne = ConstantInt::get(IntTy, -1);
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 0))
+          .match(NegOne));
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, 1))
+          .match(NegOne));
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_NE, APInt(BitWidth, -1))
+          .match(NegOne));
+}
+
+TEST_F(PatternMatchTest, SpecificIntUGT) {
+  Type *IntTy = IRB.getInt32Ty();
+  unsigned BitWidth = IntTy->getScalarSizeInBits();
+
+  Value *Zero = ConstantInt::get(IntTy, 0);
+  Value *One = ConstantInt::get(IntTy, 1);
+  Value *NegOne = ConstantInt::get(IntTy, -1);
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 0))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, 1))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGT, APInt(BitWidth, -1))
+          .match(NegOne));
+}
+
+TEST_F(PatternMatchTest, SpecificIntUGE) {
+  Type *IntTy = IRB.getInt32Ty();
+  unsigned BitWidth = IntTy->getScalarSizeInBits();
+
+  Value *Zero = ConstantInt::get(IntTy, 0);
+  Value *One = ConstantInt::get(IntTy, 1);
+  Value *NegOne = ConstantInt::get(IntTy, -1);
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 0))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, 1))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_UGE, APInt(BitWidth, -1))
+          .match(NegOne));
+}
+
 TEST_F(PatternMatchTest, SpecificIntULT) {
   Type *IntTy = IRB.getInt32Ty();
   unsigned BitWidth = IntTy->getScalarSizeInBits();
@@ -72,17 +228,230 @@ TEST_F(PatternMatchTest, SpecificIntULT) {
   Value *One = ConstantInt::get(IntTy, 1);
   Value *NegOne = ConstantInt::get(IntTy, -1);
 
-  EXPECT_FALSE(m_SpecificInt_ULT(APInt(BitWidth, 0)).match(Zero));
-  EXPECT_FALSE(m_SpecificInt_ULT(APInt(BitWidth, 0)).match(One));
-  EXPECT_FALSE(m_SpecificInt_ULT(APInt(BitWidth, 0)).match(NegOne));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 0))
+          .match(NegOne));
 
-  EXPECT_TRUE(m_SpecificInt_ULT(APInt(BitWidth, 1)).match(Zero));
-  EXPECT_FALSE(m_SpecificInt_ULT(APInt(BitWidth, 1)).match(One));
-  EXPECT_FALSE(m_SpecificInt_ULT(APInt(BitWidth, 1)).match(NegOne));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, 1))
+          .match(NegOne));
 
-  EXPECT_TRUE(m_SpecificInt_ULT(APInt(BitWidth, -1)).match(Zero));
-  EXPECT_TRUE(m_SpecificInt_ULT(APInt(BitWidth, -1)).match(One));
-  EXPECT_FALSE(m_SpecificInt_ULT(APInt(BitWidth, -1)).match(NegOne));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULT, APInt(BitWidth, -1))
+          .match(NegOne));
+}
+
+TEST_F(PatternMatchTest, SpecificIntULE) {
+  Type *IntTy = IRB.getInt32Ty();
+  unsigned BitWidth = IntTy->getScalarSizeInBits();
+
+  Value *Zero = ConstantInt::get(IntTy, 0);
+  Value *One = ConstantInt::get(IntTy, 1);
+  Value *NegOne = ConstantInt::get(IntTy, -1);
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 0))
+          .match(NegOne));
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, 1))
+          .match(NegOne));
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_ULE, APInt(BitWidth, -1))
+          .match(NegOne));
+}
+
+TEST_F(PatternMatchTest, SpecificIntSGT) {
+  Type *IntTy = IRB.getInt32Ty();
+  unsigned BitWidth = IntTy->getScalarSizeInBits();
+
+  Value *Zero = ConstantInt::get(IntTy, 0);
+  Value *One = ConstantInt::get(IntTy, 1);
+  Value *NegOne = ConstantInt::get(IntTy, -1);
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 0))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, 1))
+          .match(NegOne));
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGT, APInt(BitWidth, -1))
+          .match(NegOne));
+}
+
+TEST_F(PatternMatchTest, SpecificIntSGE) {
+  Type *IntTy = IRB.getInt32Ty();
+  unsigned BitWidth = IntTy->getScalarSizeInBits();
+
+  Value *Zero = ConstantInt::get(IntTy, 0);
+  Value *One = ConstantInt::get(IntTy, 1);
+  Value *NegOne = ConstantInt::get(IntTy, -1);
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 0))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, 1))
+          .match(NegOne));
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SGE, APInt(BitWidth, -1))
+          .match(NegOne));
+}
+
+TEST_F(PatternMatchTest, SpecificIntSLT) {
+  Type *IntTy = IRB.getInt32Ty();
+  unsigned BitWidth = IntTy->getScalarSizeInBits();
+
+  Value *Zero = ConstantInt::get(IntTy, 0);
+  Value *One = ConstantInt::get(IntTy, 1);
+  Value *NegOne = ConstantInt::get(IntTy, -1);
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 0))
+          .match(NegOne));
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, 1))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLT, APInt(BitWidth, -1))
+          .match(NegOne));
+}
+
+TEST_F(PatternMatchTest, SpecificIntSLE) {
+  Type *IntTy = IRB.getInt32Ty();
+  unsigned BitWidth = IntTy->getScalarSizeInBits();
+
+  Value *Zero = ConstantInt::get(IntTy, 0);
+  Value *One = ConstantInt::get(IntTy, 1);
+  Value *NegOne = ConstantInt::get(IntTy, -1);
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 0))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 0))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 0))
+          .match(NegOne));
+
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 1))
+          .match(Zero));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, 1))
+          .match(NegOne));
+
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, -1))
+          .match(Zero));
+  EXPECT_FALSE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, -1))
+          .match(One));
+  EXPECT_TRUE(
+      m_SpecificInt_ICMP(ICmpInst::Predicate::ICMP_SLE, APInt(BitWidth, -1))
+          .match(NegOne));
 }
 
 TEST_F(PatternMatchTest, CommutativeDeferredValue) {