update lerp builtin test

Author: farzonl

clang/test/CodeGenHLSL/builtins/lerp-builtin.hlsl

@@ -1,15 +1,15 @@
 // RUN: %clang_cc1 -finclude-default-header -x hlsl -triple dxil-pc-shadermodel6.3-library %s -fnative-half-type -emit-llvm -disable-llvm-passes -o - | FileCheck %s
 
 // CHECK-LABEL: builtin_lerp_half_vector
-// CHECK: %dx.lerp = call <3 x half> @llvm.dx.lerp.v3f16(<3 x half> %0, <3 x half> %1, <3 x half> %2)
-// CHECK: ret <3 x half> %dx.lerp
+// CHECK: %hlsl.lerp = call <3 x half> @llvm.dx.lerp.v3f16(<3 x half> %0, <3 x half> %1, <3 x half> %2)
+// CHECK: ret <3 x half> %hlsl.lerp
 half3 builtin_lerp_half_vector (half3 p0) {
   return __builtin_hlsl_lerp ( p0, p0, p0 );
 }
 
 // CHECK-LABEL: builtin_lerp_floar_vector
-// CHECK: %dx.lerp = call <2 x float> @llvm.dx.lerp.v2f32(<2 x float> %0, <2 x float> %1, <2 x float> %2)
-// CHECK: ret <2 x float> %dx.lerp
+// CHECK: %hlsl.lerp = call <2 x float> @llvm.dx.lerp.v2f32(<2 x float> %0, <2 x float> %1, <2 x float> %2)
+// CHECK: ret <2 x float> %hlsl.lerp
 float2 builtin_lerp_floar_vector ( float2 p0) {
   return __builtin_hlsl_lerp ( p0, p0, p0 );
 }