diff --git a/test/CodeGen/X86/limited-prec.ll b/test/CodeGen/X86/limited-prec.ll
index ef9ddb78968..6afaea429b8 100644
--- a/test/CodeGen/X86/limited-prec.ll
+++ b/test/CodeGen/X86/limited-prec.ll
@@ -1,5 +1,9 @@
-; ModuleID = '<stdin>'
-target triple = "i386-apple-darwin9.5"
+; RUN: llvm-as < %s | llc -limit-float-precision=6 -march=x86 | \
+; RUN:    not grep exp | not grep log | not grep pow
+; RUN: llvm-as < %s | llc -limit-float-precision=12 -march=x86 | \
+; RUN:    not grep exp | not grep log | not grep pow
+; RUN: llvm-as < %s | llc -limit-float-precision=18 -march=x86 | \
+; RUN:    not grep exp | not grep log | not grep pow
 
 define float @f1(float %x) nounwind noinline {
 entry: