[llvm] [ConstantFPRange] Remove `ConstantFPRange::toKnownFPClass` (PR #109960)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw created https://github.com/llvm/llvm-project/pull/109960

Addresses comment https://github.com/llvm/llvm-project/pull/86483#pullrequestreview-2327710679.


>From 8df5eac7baf3476f123a7319d2ec3a374f29b0e0 Mon Sep 17 00:00:00 2001
From: Yingwei Zheng <dtcxzyw2333 at gmail.com>
Date: Wed, 25 Sep 2024 18:52:59 +0800
Subject: [PATCH] [ConstantFPRange] Remove `ConstantFPRange::toKnownFPClass`

---
 llvm/include/llvm/IR/ConstantFPRange.h    | 3 ---
 llvm/lib/IR/ConstantFPRange.cpp           | 7 -------
 llvm/unittests/IR/ConstantFPRangeTest.cpp | 3 ---
 3 files changed, 13 deletions(-)

diff --git a/llvm/include/llvm/IR/ConstantFPRange.h b/llvm/include/llvm/IR/ConstantFPRange.h
index 23f0e8b8e0d134..67f9f945d748ba 100644
--- a/llvm/include/llvm/IR/ConstantFPRange.h
+++ b/llvm/include/llvm/IR/ConstantFPRange.h
@@ -175,9 +175,6 @@ class [[nodiscard]] ConstantFPRange {
   /// Return the FPClassTest which will return true for the value.
   FPClassTest classify() const;
 
-  /// Return known floating-point classes for values in this range.
-  KnownFPClass toKnownFPClass() const;
-
   /// Print out the bounds to a stream.
   void print(raw_ostream &OS) const;
 
diff --git a/llvm/lib/IR/ConstantFPRange.cpp b/llvm/lib/IR/ConstantFPRange.cpp
index 58aab353b43939..6b3610f5cdfe8c 100644
--- a/llvm/lib/IR/ConstantFPRange.cpp
+++ b/llvm/lib/IR/ConstantFPRange.cpp
@@ -196,13 +196,6 @@ FPClassTest ConstantFPRange::classify() const {
   return static_cast<FPClassTest>(Mask);
 }
 
-KnownFPClass ConstantFPRange::toKnownFPClass() const {
-  KnownFPClass Result;
-  Result.KnownFPClasses = classify();
-  Result.SignBit = getSignBit();
-  return Result;
-}
-
 void ConstantFPRange::print(raw_ostream &OS) const {
   if (isFullSet())
     OS << "full-set";
diff --git a/llvm/unittests/IR/ConstantFPRangeTest.cpp b/llvm/unittests/IR/ConstantFPRangeTest.cpp
index bf6ea95c00e22e..5a00c6b11d12b5 100644
--- a/llvm/unittests/IR/ConstantFPRangeTest.cpp
+++ b/llvm/unittests/IR/ConstantFPRangeTest.cpp
@@ -363,14 +363,11 @@ TEST_F(ConstantFPRangeTest, FPClassify) {
   EXPECT_EQ(SomeNeg.classify(), fcNegFinite);
   EXPECT_EQ(PosInf.classify(), fcPosInf);
   EXPECT_EQ(NegInf.classify(), fcNegInf);
-  EXPECT_TRUE(SomePos.toKnownFPClass().cannotBeOrderedLessThanZero());
   EXPECT_EQ(Finite.getSignBit(), std::nullopt);
   EXPECT_EQ(PosZero.getSignBit(), false);
   EXPECT_EQ(NegZero.getSignBit(), true);
   EXPECT_EQ(SomePos.getSignBit(), false);
   EXPECT_EQ(SomeNeg.getSignBit(), true);
-  EXPECT_EQ(SomePos.toKnownFPClass().SignBit, false);
-  EXPECT_EQ(SomeNeg.toKnownFPClass().SignBit, true);
 
   EnumerateConstantFPRanges(
       [](const ConstantFPRange &CR) {