[libc] Fix asin_test smoke test for DAZ modes due to mis-optimization on newer clang. (#141996)

Author: lntue

libc/test/src/math/smoke/asin_test.cpp

@@ -31,22 +31,26 @@ TEST_F(LlvmLibcAsinTest, SpecialNumbers) {
 
 using namespace LIBC_NAMESPACE::testing;
 
+// With FTZ/DAZ flags are set, when the inputs are denormal, the output bit
+// pattern might not be exactly 0, but they should all be equal to 0 as floating
+// points.
+
 TEST_F(LlvmLibcAsinTest, FTZMode) {
   ModifyMXCSR mxcsr(FTZ);
 
-  EXPECT_FP_EQ(zero, LIBC_NAMESPACE::asin(min_denormal));
+  EXPECT_TRUE(zero == LIBC_NAMESPACE::asin(min_denormal));
 }
 
 TEST_F(LlvmLibcAsinTest, DAZMode) {
   ModifyMXCSR mxcsr(DAZ);
 
-  EXPECT_FP_EQ(zero, LIBC_NAMESPACE::asin(min_denormal));
+  EXPECT_TRUE(zero == LIBC_NAMESPACE::asin(min_denormal));
 }
 
 TEST_F(LlvmLibcAsinTest, FTZDAZMode) {
   ModifyMXCSR mxcsr(FTZ | DAZ);
 
-  EXPECT_FP_EQ(zero, LIBC_NAMESPACE::asin(min_denormal));
+  EXPECT_TRUE(zero == LIBC_NAMESPACE::asin(min_denormal));
 }
 
 #endif