[libc] Remove RandUtils.(h|cpp). (#88044)

Author: lntue

libc/test/src/CMakeLists.txt

@@ -24,7 +24,7 @@ function(add_fp_unittest name)
       message(FATAL_ERROR "Hermetic math test cannot require MPFR.")
     endif()
     set(test_type UNIT_TEST_ONLY)
-    list(APPEND MATH_UNITTEST_LINK_LIBRARIES libcMPFRWrapper libc_math_test_utils -lmpfr -lgmp)
+    list(APPEND MATH_UNITTEST_LINK_LIBRARIES libcMPFRWrapper -lmpfr -lgmp)
   endif()
   list(APPEND MATH_UNITTEST_LINK_LIBRARIES LibcFPTestHelpers)
 

libc/test/src/math/CMakeLists.txt

@@ -1,15 +1,5 @@
 add_custom_target(libc-math-unittests)
 
-# FIXME: We shouldn't have regular libraries created because we could be
-#        cross-compiling the tests and running through an emulator.
-if(NOT LIBC_TARGET_OS_IS_GPU)
-  add_library(
-    libc_math_test_utils
-    RandUtils.cpp
-    RandUtils.h
-  )
-endif()
-
 add_fp_unittest(
   cosf_test
   NEED_MPFR
@@ -1280,6 +1270,7 @@ add_fp_unittest(
     fmaf_test.cpp
   DEPENDS
     libc.src.math.fmaf
+    libc.src.stdlib.rand
     libc.src.__support.FPUtil.fp_bits
   FLAGS
     FMA_OPT__ONLY
@@ -1294,6 +1285,7 @@ add_fp_unittest(
     fma_test.cpp
   DEPENDS
     libc.src.math.fma
+    libc.src.stdlib.rand
     libc.src.__support.FPUtil.fp_bits
 )
 

libc/test/src/math/FmaTest.h

@@ -10,9 +10,9 @@
 #define LLVM_LIBC_TEST_SRC_MATH_FMATEST_H
 
 #include "src/__support/FPUtil/FPBits.h"
+#include "src/stdlib/rand.h"
 #include "test/UnitTest/FPMatcher.h"
 #include "test/UnitTest/Test.h"
-#include "test/src/math/RandUtils.h"
 #include "utils/MPFRWrapper/MPFRUtils.h"
 
 namespace mpfr = LIBC_NAMESPACE::testing::mpfr;
@@ -43,8 +43,7 @@ class FmaTestTemplate : public LIBC_NAMESPACE::testing::Test {
   StorageType get_random_bit_pattern() {
     StorageType bits{0};
     for (StorageType i = 0; i < sizeof(StorageType) / 2; ++i) {
-      bits = (bits << 2) +
-             static_cast<uint16_t>(LIBC_NAMESPACE::testutils::rand());
+      bits = (bits << 2) + static_cast<uint16_t>(LIBC_NAMESPACE::rand());
     }
     return bits;
   }