Revert "Add missing extendhfxf2 in compiler rt" (#110662)

Reverts llvm/llvm-project#109090

compiler-rt/lib/builtins/CMakeLists.txt

@@ -104,7 +104,6 @@ set(GENERIC_SOURCES
   divti3.c
   extendsfdf2.c
   extendhfsf2.c
-  extendhfxf2.c
   ffsdi2.c
   ffssi2.c
   ffsti2.c

compiler-rt/lib/builtins/extendhfxf2.c

@@ -1,18 +0,0 @@
-//===-- lib/extendhfxf2.c - half -> long double conversion --------*- 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
-//
-//===----------------------------------------------------------------------===//
-
-#define SRC_HALF
-#define DST_DOUBLE
-#include "fp_extend_impl.inc"
-
-// Use a forwarding definition and noinline to implement a poor man's alias,
-// as there isn't a good cross-platform way of defining one.
-// Long double are expected to be as precise as double.
-COMPILER_RT_ABI NOINLINE long double __extendhfxf2(src_t a) {
-  return (long double)__extendXfYf2__(a);
-}

compiler-rt/lib/builtins/macho_embedded/common.txt

@@ -60,7 +60,6 @@ divsf3
 divsi3
 extendsfdf2
 extendhfsf2
-extendhfxf2
 ffssi2
 fixdfsi
 fixsfsi

compiler-rt/test/builtins/Unit/extendhfxf2_test.c

@@ -1,61 +0,0 @@
-// RUN: %clang_builtins %s %librt -o %t && %run %t
-// REQUIRES: librt_has_extendhfxf2
-
-#include <limits.h>
-#include <math.h> // for isnan, isinf
-#include <stdio.h>
-
-long double __extendhfxf2(_Float16 f);
-
-int test_extendhfxf2(_Float16 a, long double expected) {
-  long double x = __extendhfxf2(a);
-  __uint16_t *b = (void *)&a;
-  int ret = !(x == expected || (isnan(x) && isnan(expected)) ||
-              (isinf(x) && isinf(expected) && x == expected));
-  if (ret) {
-    printf("error in test__extendhfsf2(%#.4x) = %.20Lf, "
-           "expected %.20Lf\n",
-           *b, x, expected);
-  }
-  return ret;
-}
-
-char assumption_1[sizeof(_Float16) * CHAR_BIT == 16] = {0};
-
-int main() {
-  // Small positive value
-  if (test_extendhfxf2(0.09997558593750000000f, 0.09997558593750000000L))
-    return 1;
-
-  // Small negative value
-  if (test_extendhfxf2(-0.09997558593750000000f, -0.09997558593750000000L))
-    return 1;
-
-  // Zero
-  if (test_extendhfxf2(0.0f, 0.0L))
-    return 1;
-
-  // Smallest positive non-zero value
-  if (test_extendhfxf2(0x1p-16f, 0x1p-16L))
-    return 1;
-
-  // Smallest negative non-zero value
-  if (test_extendhfxf2(-0x1p-16f, -0x1p-16L))
-    return 1;
-
-  // Positive infinity
-  if (test_extendhfxf2(__builtin_huge_valf16(), __builtin_huge_valf64x()))
-    return 1;
-
-  // Negative infinity
-  if (test_extendhfxf2(-__builtin_huge_valf16(),
-                       (long double)-__builtin_huge_valf64x()))
-    return 1;
-
-  // NaN
-  if (test_extendhfxf2(__builtin_nanf16(""),
-                       (long double)__builtin_nanf64x("")))
-    return 1;
-
-  return 0;
-}

llvm/utils/gn/secondary/compiler-rt/lib/builtins/BUILD.gn

@@ -126,7 +126,6 @@ static_library("builtins") {
     "divsi3.c",
     "divti3.c",
     "extendhfsf2.c",
-    "extendhfxf2.c"
     "extendsfdf2.c",
     "ffsdi2.c",
     "ffssi2.c",