enable -use-ir option when executing compute test cases.

Author: csyonghe

tools/slang-test/main.cpp

@@ -1137,6 +1137,7 @@ TestResult runComputeComparisonImpl(TestInput& input, const char * langOption, S
 	spawner.pushArgument("-o");
     auto actualOutputFile = outputStem + ".actual.txt";
 	spawner.pushArgument(actualOutputFile);
+    spawner.pushArgument("-xslang -use-ir");
 
     // clear the stale actual output file first. This will allow us to detect error if render-test fails and outputs nothing.
     File::WriteAllText(actualOutputFile, "");
@@ -1183,8 +1184,8 @@ TestResult runComputeComparisonImpl(TestInput& input, const char * langOption, S
     }
 	for (int i = 0; i < (int)referenceProgramOutput.Count(); i++)
 	{
-		auto reference = referenceProgramOutput[i];
-		auto actual = actualProgramOutput[i];
+		auto reference = String(referenceProgramOutput[i].Trim());
+		auto actual = String(actualProgramOutput[i].Trim());
         if (actual != reference)
         {
             // try to parse reference as float, and compare again