[DAG] Add SDPatternMatch m_SMin/m_SMax/m_UMin/m_UMax matchers

Author: RKSimon

llvm/include/llvm/CodeGen/SDPatternMatch.h

@@ -510,6 +510,26 @@ inline BinaryOpc_match<LHS, RHS, true> m_Xor(const LHS &L, const RHS &R) {
   return BinaryOpc_match<LHS, RHS, true>(ISD::XOR, L, R);
 }
 
+template <typename LHS, typename RHS>
+inline BinaryOpc_match<LHS, RHS, true> m_SMin(const LHS &L, const RHS &R) {
+  return BinaryOpc_match<LHS, RHS, true>(ISD::SMIN, L, R);
+}
+
+template <typename LHS, typename RHS>
+inline BinaryOpc_match<LHS, RHS, true> m_SMax(const LHS &L, const RHS &R) {
+  return BinaryOpc_match<LHS, RHS, true>(ISD::SMAX, L, R);
+}
+
+template <typename LHS, typename RHS>
+inline BinaryOpc_match<LHS, RHS, true> m_UMin(const LHS &L, const RHS &R) {
+  return BinaryOpc_match<LHS, RHS, true>(ISD::UMIN, L, R);
+}
+
+template <typename LHS, typename RHS>
+inline BinaryOpc_match<LHS, RHS, true> m_UMax(const LHS &L, const RHS &R) {
+  return BinaryOpc_match<LHS, RHS, true>(ISD::UMAX, L, R);
+}
+
 template <typename LHS, typename RHS>
 inline BinaryOpc_match<LHS, RHS, false> m_UDiv(const LHS &L, const RHS &R) {
   return BinaryOpc_match<LHS, RHS, false>(ISD::UDIV, L, R);

llvm/unittests/CodeGen/SelectionDAGPatternMatchTest.cpp

@@ -133,6 +133,10 @@ TEST_F(SelectionDAGPatternMatchTest, matchBinaryOp) {
   SDValue And = DAG->getNode(ISD::AND, DL, Int32VT, Op0, Op1);
   SDValue Xor = DAG->getNode(ISD::XOR, DL, Int32VT, Op1, Op0);
   SDValue Or  = DAG->getNode(ISD::OR, DL, Int32VT, Op0, Op1);
+  SDValue SMax = DAG->getNode(ISD::SMAX, DL, Int32VT, Op0, Op1);
+  SDValue SMin = DAG->getNode(ISD::SMIN, DL, Int32VT, Op1, Op0);
+  SDValue UMax = DAG->getNode(ISD::UMAX, DL, Int32VT, Op0, Op1);
+  SDValue UMin = DAG->getNode(ISD::UMIN, DL, Int32VT, Op1, Op0);
 
   SDValue SFAdd = DAG->getNode(ISD::STRICT_FADD, DL, {Float32VT, MVT::Other},
                                {DAG->getEntryNode(), Op2, Op2});
@@ -155,6 +159,15 @@ TEST_F(SelectionDAGPatternMatchTest, matchBinaryOp) {
   EXPECT_TRUE(sd_match(Or, m_c_BinOp(ISD::OR, m_Value(), m_Value())));
   EXPECT_TRUE(sd_match(Or, m_Or(m_Value(), m_Value())));
 
+  EXPECT_TRUE(sd_match(SMax, m_c_BinOp(ISD::SMAX, m_Value(), m_Value())));
+  EXPECT_TRUE(sd_match(SMax, m_SMax(m_Value(), m_Value())));
+  EXPECT_TRUE(sd_match(SMin, m_c_BinOp(ISD::SMIN, m_Value(), m_Value())));
+  EXPECT_TRUE(sd_match(SMin, m_SMin(m_Value(), m_Value())));
+  EXPECT_TRUE(sd_match(UMax, m_c_BinOp(ISD::UMAX, m_Value(), m_Value())));
+  EXPECT_TRUE(sd_match(UMax, m_UMax(m_Value(), m_Value())));
+  EXPECT_TRUE(sd_match(UMin, m_c_BinOp(ISD::UMIN, m_Value(), m_Value())));
+  EXPECT_TRUE(sd_match(UMin, m_UMin(m_Value(), m_Value())));
+
   SDValue BindVal;
   EXPECT_TRUE(sd_match(SFAdd, m_ChainedBinOp(ISD::STRICT_FADD, m_Value(BindVal),
                                              m_Deferred(BindVal))));