Revert "Reland [EquivClasses] Introduce members iterator-helper (#130319)"

This reverts commit 21d973d.

Author: vitalybuka

llvm/include/llvm/ADT/EquivalenceClasses.h

@@ -15,7 +15,6 @@
 #ifndef LLVM_ADT_EQUIVALENCECLASSES_H
 #define LLVM_ADT_EQUIVALENCECLASSES_H
 
-#include "llvm/ADT/iterator_range.h"
 #include <cassert>
 #include <cstddef>
 #include <cstdint>
@@ -179,9 +178,6 @@ class EquivalenceClasses {
   member_iterator member_end() const {
     return member_iterator(nullptr);
   }
-  iterator_range<member_iterator> members(iterator I) const {
-    return make_range(member_begin(I), member_end());
-  }
 
   /// findValue - Return an iterator to the specified value.  If it does not
   /// exist, end() is returned.

llvm/lib/Analysis/LoopAccessAnalysis.cpp

@@ -527,8 +527,9 @@ void RuntimePointerChecking::groupChecks(
     // iteration order within an equivalence class member is only dependent on
     // the order in which unions and insertions are performed on the
     // equivalence class, the iteration order is deterministic.
-    for (const auto &MI : DepCands.members(LeaderI)) {
-      auto PointerI = PositionMap.find(MI.getPointer());
+    for (auto MI = DepCands.member_begin(LeaderI), ME = DepCands.member_end();
+         MI != ME; ++MI) {
+      auto PointerI = PositionMap.find(MI->getPointer());
       assert(PointerI != PositionMap.end() &&
              "pointer in equivalence class not found in PositionMap");
       for (unsigned Pointer : PointerI->second) {

llvm/lib/Analysis/VectorUtils.cpp

@@ -845,7 +845,7 @@ llvm::computeMinimumValueSizes(ArrayRef<BasicBlock *> Blocks, DemandedBits &DB,
 
   for (auto I = ECs.begin(), E = ECs.end(); I != E; ++I) {
     uint64_t LeaderDemandedBits = 0;
-    for (Value *M : ECs.members(I))
+    for (Value *M : llvm::make_range(ECs.member_begin(I), ECs.member_end()))
       LeaderDemandedBits |= DBits[M];
 
     uint64_t MinBW = llvm::bit_width(LeaderDemandedBits);
@@ -857,15 +857,15 @@ llvm::computeMinimumValueSizes(ArrayRef<BasicBlock *> Blocks, DemandedBits &DB,
     // indvars.
     // If we are required to shrink a PHI, abandon this entire equivalence class.
     bool Abort = false;
-    for (Value *M : ECs.members(I))
+    for (Value *M : llvm::make_range(ECs.member_begin(I), ECs.member_end()))
       if (isa<PHINode>(M) && MinBW < M->getType()->getScalarSizeInBits()) {
         Abort = true;
         break;
       }
     if (Abort)
       continue;
 
-    for (Value *M : ECs.members(I)) {
+    for (Value *M : llvm::make_range(ECs.member_begin(I), ECs.member_end())) {
       auto *MI = dyn_cast<Instruction>(M);
       if (!MI)
         continue;

llvm/unittests/ADT/EquivalenceClassesTest.cpp

@@ -7,7 +7,6 @@
 //===----------------------------------------------------------------------===//
 
 #include "llvm/ADT/EquivalenceClasses.h"
-#include "gmock/gmock.h"
 #include "gtest/gtest.h"
 
 using namespace llvm;
@@ -67,19 +66,6 @@ TEST(EquivalenceClassesTest, TwoSets) {
         EXPECT_FALSE(EqClasses.isEquivalent(i, j));
 }
 
-TEST(EquivalenceClassesTest, MembersIterator) {
-  EquivalenceClasses<int> EC;
-  EC.unionSets(1, 2);
-  EC.insert(4);
-  EC.insert(5);
-  EC.unionSets(5, 1);
-  EXPECT_EQ(EC.getNumClasses(), 2u);
-
-  EquivalenceClasses<int>::iterator I = EC.findValue(EC.getLeaderValue(1));
-  EXPECT_THAT(EC.members(I), testing::ElementsAre(5, 1, 2));
-  EXPECT_EQ(EC.members(EC.end()).begin(), EC.member_end());
-}
-
 // Type-parameterized tests: Run the same test cases with different element
 // types.
 template <typename T> class ParameterizedTest : public testing::Test {};