[llvm] [DAG] Add SDPatternMatch m_ZExtOrSelf/m_SExtOrSelf/m_AExtOrSelf/m_TruncOrSelf matchers (PR #85480)

[Marc Auberer via llvm-commits]

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@@ -251,6 +251,29 @@ TEST_F(SelectionDAGPatternMatchTest, patternCombinators) {
   EXPECT_TRUE(sd_match(Add, m_AllOf(m_Opc(ISD::ADD), m_OneUse())));
 }
 
+TEST_F(SelectionDAGPatternMatchTest, optionalResizing) {
+  SDLoc DL;
+  auto Int32VT = EVT::getIntegerVT(Context, 32);
+  auto Int64VT = EVT::getIntegerVT(Context, 64);
+
+  SDValue Op32 = DAG->getCopyFromReg(DAG->getEntryNode(), DL, 1, Int32VT);
+  SDValue Op64 = DAG->getCopyFromReg(DAG->getEntryNode(), DL, 1, Int64VT);
+  SDValue ZExt = DAG->getNode(ISD::ZERO_EXTEND, DL, Int64VT, Op32);
+  SDValue SExt = DAG->getNode(ISD::SIGN_EXTEND, DL, Int64VT, Op32);
+  SDValue AExt = DAG->getNode(ISD::ANY_EXTEND, DL, Int64VT, Op32);
+  SDValue Trunc = DAG->getNode(ISD::TRUNCATE, DL, Int32VT, Op64);
+
+  using namespace SDPatternMatch;
+  EXPECT_TRUE(sd_match(Op32, m_ZExtOrSelf(m_Value())));
+  EXPECT_TRUE(sd_match(ZExt, m_ZExtOrSelf(m_Value())));
+  EXPECT_TRUE(sd_match(Op64, m_SExtOrSelf(m_Value())));
+  EXPECT_TRUE(sd_match(SExt, m_SExtOrSelf(m_Value())));
+  EXPECT_TRUE(sd_match(Op32, m_AExtOrSelf(m_Value())));
+  EXPECT_TRUE(sd_match(AExt, m_AExtOrSelf(m_Value())));
+  EXPECT_TRUE(sd_match(Op64, m_TruncOrSelf(m_Value())));
+  EXPECT_TRUE(sd_match(Trunc, m_TruncOrSelf(m_Value())));
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marcauberer wrote:

Done.

https://github.com/llvm/llvm-project/pull/85480