Address review comments

Author: david-arm

llvm/test/Transforms/LoopVectorize/X86/fp32_to_uint32-cost-model.ll

@@ -8,7 +8,7 @@ target triple = "x86_64-apple-macosx"
 
 ; If we need to scalarize the fptoui and then use inserts to build up the
 ; vector again, then there is certainly no value in going 256-bit wide.
-; CHECK: fptoui <8 x float>
+; CHECK-NOT: fptoui <4 x float>
 
 define void @convert(i32 %N) {
 entry:

llvm/test/Transforms/LoopVectorize/X86/fp64_to_uint32-cost-model.ll

@@ -9,7 +9,7 @@ target triple = "x86_64-apple-macosx"
 
 ; If we need to scalarize the fptoui and then use inserts to build up the
 ; vector again, then there is certainly no value in going 256-bit wide.
-; CHECK: fptoui <4 x double>
+; CHECK-NOT: fptoui <2 x double>
 
 define void @convert() {
 entry: