[compiler-rt] Revert "[nsan] More unit tests for `float128`. (#165248)" (PR #165391)

[Clement Courbet via llvm-commits]

https://github.com/legrosbuffle created https://github.com/llvm/llvm-project/pull/165391

This reverts commit 2f869c427b6c800f37147458ac03d1fa6f9ad9d3.

Breaks build on some configurations

>From 06df5cfc6514b2de623f79680459725552f63910 Mon Sep 17 00:00:00 2001
From: Clement Courbet <clement.courbet at gmail.com>
Date: Tue, 28 Oct 2025 14:37:35 +0100
Subject: [PATCH] Revert "[nsan] More unit tests for `float128`. (#165248)"

This reverts commit 2f869c427b6c800f37147458ac03d1fa6f9ad9d3.
---
 compiler-rt/lib/nsan/tests/NSanUnitTest.cpp | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/compiler-rt/lib/nsan/tests/NSanUnitTest.cpp b/compiler-rt/lib/nsan/tests/NSanUnitTest.cpp
index 73b59671fe07a..d121292c36682 100644
--- a/compiler-rt/lib/nsan/tests/NSanUnitTest.cpp
+++ b/compiler-rt/lib/nsan/tests/NSanUnitTest.cpp
@@ -43,8 +43,8 @@ template <typename FT, auto next> void TestFT() {
   ASSERT_EQ(GetULPDiff<FT>(-X, -Y), 3);
 
   // Values with larger differences.
-  static constexpr const __uint128_t MantissaSize =
-      __uint128_t{1} << FTInfo<FT>::kMantissaBits;
+  static constexpr const __sanitizer::u64 MantissaSize =
+      __sanitizer::u64{1} << FTInfo<FT>::kMantissaBits;
   ASSERT_EQ(GetULPDiff<FT>(1.0, next(2.0, 1.0)), MantissaSize - 1);
   ASSERT_EQ(GetULPDiff<FT>(1.0, 2.0), MantissaSize);
   ASSERT_EQ(GetULPDiff<FT>(1.0, next(2.0, 3.0)), MantissaSize + 1);
@@ -57,6 +57,11 @@ TEST(NSanTest, Double) {
   TestFT<double, static_cast<double (*)(double, double)>(nextafter)>();
 }
 
-TEST(NSanTest, Float128) { TestFT<__float128, nextafterf128>(); }
+TEST(NSanTest, Float128) {
+  // Very basic tests. FIXME: improve when we have nextafter<__float128>.
+  ASSERT_EQ(GetULPDiff<__float128>(0.0, 0.0), 0);
+  ASSERT_EQ(GetULPDiff<__float128>(-0.0, 0.0), 0);
+  ASSERT_NE(GetULPDiff<__float128>(-0.01, 0.01), kMaxULPDiff);
+}
 
 } // end namespace __nsan