Revert "[ADT][StringMap] Add ability to precompute and reuse the string hash"

Crash identified internally in lld's use of StringMap in
`compareSections`. Will investigate offline before recommitting.

This reverts commit 67c631d283fc96d652304199cd625be426b98f8e.

1 files changed, 0 insertions, 11 deletions

diff --git a/llvm/unittests/ADT/StringMapTest.cpp b/llvm/unittests/ADT/StringMapTest.cpp
index c9ef3f8a..f9b138e 100644
--- a/llvm/unittests/ADT/StringMapTest.cpp
+++ b/llvm/unittests/ADT/StringMapTest.cpp
@@ -487,17 +487,6 @@ TEST_F(StringMapTest, NotEqualWithDifferentValues) {
   ASSERT_TRUE(B != A);
 }
 
-TEST_F(StringMapTest, PrecomputedHash) {
-  StringMap<int> A;
-  StringRef Key = "foo";
-  int Value = 42;
-  uint64_t Hash = StringMap<int>::hash(Key);
-  A.insert({"foo", Value}, Hash);
-  auto I = A.find(Key, Hash);
-  ASSERT_NE(I, A.end());
-  ASSERT_EQ(I->second, Value);
-}
-
 struct Countable {
   int &InstanceCount;
   int Number;