[llvm] [SDPatternMatch] revert SExt changes in #90762 (PR #95415)

[via llvm-commits]

https://github.com/c8ef created https://github.com/llvm/llvm-project/pull/95415

Context: https://github.com/llvm/llvm-project/pull/95365#discussion_r1638236603

>From 79e6d5dc27581414f061f489a95190eb39f06548 Mon Sep 17 00:00:00 2001
From: c8ef <c8ef at outlook.com>
Date: Thu, 13 Jun 2024 14:18:38 +0000
Subject: [PATCH] revert m_SExt

---
 llvm/include/llvm/CodeGen/SDPatternMatch.h              | 3 +--
 llvm/unittests/CodeGen/SelectionDAGPatternMatchTest.cpp | 4 ----
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/llvm/include/llvm/CodeGen/SDPatternMatch.h b/llvm/include/llvm/CodeGen/SDPatternMatch.h
index 071a27a795064..f39fbd95b3beb 100644
--- a/llvm/include/llvm/CodeGen/SDPatternMatch.h
+++ b/llvm/include/llvm/CodeGen/SDPatternMatch.h
@@ -642,8 +642,7 @@ template <typename Opnd> inline UnaryOpc_match<Opnd> m_ZExt(const Opnd &Op) {
 }
 
 template <typename Opnd> inline auto m_SExt(const Opnd &Op) {
-  return m_AnyOf(UnaryOpc_match<Opnd>(ISD::SIGN_EXTEND, Op),
-                 m_Node(ISD::SIGN_EXTEND_INREG, Op, m_Value()));
+  return UnaryOpc_match<Opnd>(ISD::SIGN_EXTEND, Op);
 }
 
 template <typename Opnd> inline UnaryOpc_match<Opnd> m_AnyExt(const Opnd &Op) {
diff --git a/llvm/unittests/CodeGen/SelectionDAGPatternMatchTest.cpp b/llvm/unittests/CodeGen/SelectionDAGPatternMatchTest.cpp
index 24930b965f1de..18d6ebeb9076a 100644
--- a/llvm/unittests/CodeGen/SelectionDAGPatternMatchTest.cpp
+++ b/llvm/unittests/CodeGen/SelectionDAGPatternMatchTest.cpp
@@ -269,8 +269,6 @@ TEST_F(SelectionDAGPatternMatchTest, optionalResizing) {
   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 SExtInReg = DAG->getNode(ISD::SIGN_EXTEND_INREG, DL, Int64VT, Op64,
-                                   DAG->getValueType(Int32VT));
   SDValue AExt = DAG->getNode(ISD::ANY_EXTEND, DL, Int64VT, Op32);
   SDValue Trunc = DAG->getNode(ISD::TRUNCATE, DL, Int32VT, Op64);
 
@@ -284,8 +282,6 @@ TEST_F(SelectionDAGPatternMatchTest, optionalResizing) {
   EXPECT_TRUE(A == Op64);
   EXPECT_TRUE(sd_match(SExt, m_SExtOrSelf(m_Value(A))));
   EXPECT_TRUE(A == Op32);
-  EXPECT_TRUE(sd_match(SExtInReg, m_SExtOrSelf(m_Value(A))));
-  EXPECT_TRUE(A == Op64);
   EXPECT_TRUE(sd_match(Op32, m_AExtOrSelf(m_Value(A))));
   EXPECT_TRUE(A == Op32);
   EXPECT_TRUE(sd_match(AExt, m_AExtOrSelf(m_Value(A))));