diff --git a/test/CodeGen/X86/fp_constant_op.llx b/test/CodeGen/X86/fp_constant_op.llx
new file mode 100644
index 00000000000..2b645e0256b
--- /dev/null
+++ b/test/CodeGen/X86/fp_constant_op.llx
@@ -0,0 +1,34 @@
+; RUN: llvm-as < %s | llc -march=x86 | grep ST | not grep 'fadd\|fsub\|fdiv\|fmul'
+
+; Test that the load of the constant is folded into the operation.
+
+double %test_add(double %P) {
+        %tmp.1 = add double %P, 0x405EC00000000000
+        ret double %tmp.1
+}
+
+double %test_mul(double %P) {
+        %tmp.1 = mul double %P, 0x405EC00000000000
+        ret double %tmp.1
+}
+
+double %test_sub(double %P) {
+        %tmp.1 = sub double %P, 0x405EC00000000000
+        ret double %tmp.1
+}
+
+double %test_subr(double %P) {
+        %tmp.1 = sub double 0x405EC00000000000, %P
+        ret double %tmp.1
+}
+
+double %test_div(double %P) {
+        %tmp.1 = div double %P, 0x405EC00000000000
+        ret double %tmp.1
+}
+
+double %test_divr(double %P) {
+        %tmp.1 = div double 0x405EC00000000000, %P
+        ret double %tmp.1
+}
+