[DirectX] fix fail test (#108468)

Fix fails in floor.ll.
1. Need to enable scalarizer.
2. Need to use 27 for floor.

Author: python3kgae

llvm/test/CodeGen/DirectX/floor.ll

@@ -1,4 +1,4 @@
-; RUN: opt -S -passes=dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-library %s | FileCheck %s
+; RUN: opt -S -scalarizer -dxil-op-lower -mtriple=dxil-pc-shadermodel6.3-library %s | FileCheck %s
 
 ; Make sure dxil operation function calls for floor are generated for float and half.
 
@@ -19,13 +19,13 @@ entry:
 define noundef <4 x float> @floor_float4(<4 x float> noundef %a) {
 entry:
   ; CHECK: [[ee0:%.*]] = extractelement <4 x float> %a, i64 0
-  ; CHECK: [[ie0:%.*]] = call float @dx.op.unary.f32(i32 19, float [[ee0]])
+  ; CHECK: [[ie0:%.*]] = call float @dx.op.unary.f32(i32 27, float [[ee0]])
   ; CHECK: [[ee1:%.*]] = extractelement <4 x float> %a, i64 1
-  ; CHECK: [[ie1:%.*]] = call float @dx.op.unary.f32(i32 19, float [[ee1]])
+  ; CHECK: [[ie1:%.*]] = call float @dx.op.unary.f32(i32 27, float [[ee1]])
   ; CHECK: [[ee2:%.*]] = extractelement <4 x float> %a, i64 2
-  ; CHECK: [[ie2:%.*]] = call float @dx.op.unary.f32(i32 19, float [[ee2]])
+  ; CHECK: [[ie2:%.*]] = call float @dx.op.unary.f32(i32 27, float [[ee2]])
   ; CHECK: [[ee3:%.*]] = extractelement <4 x float> %a, i64 3
-  ; CHECK: [[ie3:%.*]] = call float @dx.op.unary.f32(i32 19, float [[ee3]])
+  ; CHECK: [[ie3:%.*]] = call float @dx.op.unary.f32(i32 27, float [[ee3]])
   ; CHECK: insertelement <4 x float> poison, float [[ie0]], i64 0
   ; CHECK: insertelement <4 x float> %{{.*}}, float [[ie1]], i64 1
   ; CHECK: insertelement <4 x float> %{{.*}}, float [[ie2]], i64 2