Disable Subzero IR generation for performance testing.

tests_lit/reader_tests/unnamed.ll

Index: tests_lit/reader_tests/unnamed.ll
diff --git a/tests_lit/reader_tests/unnamed.ll b/tests_lit/reader_tests/unnamed.ll
index 87dccd67ad164b1319883b17379d900fcf2dd234..135e8ffb1d5af12526faf021d060333b1e3dcab6 100644
--- a/tests_lit/reader_tests/unnamed.ll
+++ b/tests_lit/reader_tests/unnamed.ll
@@ -12,6 +12,10 @@
 ; RUN:      -default-function-prefix=h -default-global-prefix=g \
 ; RUN:      | FileCheck --check-prefix=BAD %s
 
+; RUN: %p2i -i %s --args -notranslate -timing -noIRgen \
+; RUN:    | %if --need=allow_disable_ir_gen \
+; RUN:      --command FileCheck --check-prefix=NOIR %s
+
 ; TODO(kschimpf) Check global variable declarations, once generated.
 
 @0 = internal global [4 x i8] zeroinitializer, align 4
@@ -57,3 +61,5 @@ define void @h5() {
 
 ; BAD: Warning : Default global prefix 'g' potentially conflicts with name 'g'.
 ; BAD: Warning : Default function prefix 'h' potentially conflicts with name 'h5'.
+
+; NOIR: Total across all functions