Add Om1 lowering with no optimizations

crosstest/test_arith_frem.ll

Index: crosstest/test_arith_frem.ll
diff --git a/crosstest/test_arith_frem.ll b/crosstest/test_arith_frem.ll
new file mode 100644
index 0000000000000000000000000000000000000000..34b715677168186fbdbb6b3cd1d5666f1cc2ac48
--- /dev/null
+++ b/crosstest/test_arith_frem.ll
@@ -0,0 +1,11 @@
+target triple = "i686-pc-linux-gnu"
+
+define float @_Z6myFremff(float %a, float %b) {
+  %rem = frem float %a, %b
+  ret float %rem
+}
+
+define double @_Z6myFremdd(double %a, double %b) {
+  %rem = frem double %a, %b
+  ret double %rem
+}