Disable Subzero IR generation for performance testing.

tests_lit/reader_tests/call.ll

Index: tests_lit/reader_tests/call.ll
diff --git a/tests_lit/reader_tests/call.ll b/tests_lit/reader_tests/call.ll
index ffe5e0456369738672ab7b141b6118f223636b73..952cab6a1611dada29c6dfb363addbdfc919f33f 100644
--- a/tests_lit/reader_tests/call.ll
+++ b/tests_lit/reader_tests/call.ll
@@ -1,6 +1,9 @@
 ; Test handling of call instructions.
 
 ; RUN: %p2i -i %s --insts | FileCheck %s
+; RUN: %p2i -i %s --args -notranslate -timing -noIRgen \
+; RUN:    | %if --need=allow_disable_ir_gen \
+; RUN:      --command FileCheck --check-prefix=NOIR %s
 
 define i32 @fib(i32 %n) {
 entry:
@@ -106,3 +109,4 @@ if.end:                                           ; preds = %if.then, %entry
 ; CHECK-NEXT:   ret void
 ; CHECK-NEXT: }
 
+; NOIR: Total across all functions