[llvm] Constant Fold Logf128 calls (PR #84501)

[Eli Friedman via llvm-commits]

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@@ -0,0 +1,18 @@
+//===-- llvm/Support/float128.h - Compiler abstraction support --*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_FLOAT128
+#define LLVM_FLOAT128
+
+#if defined(__clang__) && defined(__FLOAT128__)
+typedef __float128 float128;
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efriedma-quic wrote:

`namespace llvm`?

https://github.com/llvm/llvm-project/pull/84501