diff --git a/clang/lib/Headers/hlsl/hlsl_intrinsics.h b/clang/lib/Headers/hlsl/hlsl_intrinsics.h
--- a/clang/lib/Headers/hlsl/hlsl_intrinsics.h
+++ b/clang/lib/Headers/hlsl/hlsl_intrinsics.h
@@ -15,11 +15,6 @@
 
 
 // abs builtins
-__attribute__((clang_builtin_alias(__builtin_abs))) int abs(int In);
-__attribute__((clang_builtin_alias(__builtin_labs))) int64_t abs(int64_t In);
-__attribute__((clang_builtin_alias(__builtin_fabsf))) float abs(float In);
-__attribute__((clang_builtin_alias(__builtin_fabs))) double abs(double In);
-
 #ifdef __HLSL_ENABLE_16_BIT
 __attribute__((clang_builtin_alias(__builtin_elementwise_abs)))
 int16_t abs(int16_t);
@@ -76,5 +71,12 @@
 __attribute__((clang_builtin_alias(__builtin_sqrtf16))) half sqrt(half In);
 #endif
 
+// ceil builtins
+__attribute__((clang_builtin_alias(__builtin_ceil))) double ceil(double In);
+__attribute__((clang_builtin_alias(__builtin_ceilf))) float ceil(float In);
+
+#ifdef __HLSL_ENABLE_16_BIT
+__attribute__((clang_builtin_alias(__builtin_ceilf16))) half ceil(half In);
+#endif
 
 #endif //_HLSL_HLSL_INTRINSICS_H_
diff --git a/clang/test/CodeGenHLSL/builtins/ceil.hlsl b/clang/test/CodeGenHLSL/builtins/ceil.hlsl
new file mode 100644
--- /dev/null
+++ b/clang/test/CodeGenHLSL/builtins/ceil.hlsl
@@ -0,0 +1,32 @@
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \
+// RUN:   dxil-pc-shadermodel6.2-library %s -fnative-half-type \
+// RUN:   -emit-llvm -disable-llvm-passes -o - | FileCheck %s
+// RUN: %clang_cc1 -std=hlsl2021 -finclude-default-header -x hlsl -triple \
+// RUN:   dxil-pc-shadermodel6.2-library %s -emit-llvm -disable-llvm-passes \
+// RUN:   -o - | FileCheck %s --check-prefix=NO_HALF
+
+double ceil_d(double x)
+{
+  return ceil(x);
+}
+
+// CHECK: define noundef double @"?ceil_d@@YANN@Z"(
+// CHECK: call double @llvm.ceil.f64(double %0)
+
+float ceil_f(float x)
+{
+  return ceil(x);
+}
+
+// CHECK: define noundef float @"?ceil_f@@YAMM@Z"(
+// CHECK: call float @llvm.ceil.f32(float %0)
+
+half ceil_h(half x)
+{
+  return ceil(x);
+}
+
+// CHECK: define noundef half @"?ceil_h@@YA$f16@$f16@@Z"(
+// CHECK: call half @llvm.ceil.f16(half %0)
+// NO_HALF: define noundef float @"?ceil_h@@YA$halff@$halff@@Z"(
+// NO_HALF: call float @llvm.ceil.f32(float %0)