1 files changed, 28 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SimplifyLibCalls/FFS.ll b/llvm/test/Transforms/SimplifyLibCalls/FFS.ll
new file mode 100644
index 00000000000..335274ac45d
--- /dev/null
+++ b/llvm/test/Transforms/SimplifyLibCalls/FFS.ll
@@ -0,0 +1,28 @@
+; Test that the ToAsciiOptimizer works correctly
+; RUN: llvm-upgrade < %s | llvm-as | opt -simplify-libcalls | llvm-dis | not grep 'call.*%ffs'
+
+declare int %ffs(int)
+declare int %ffsl(int)
+declare int %ffsll(long)
+
+%non_const = external global int
+
+implementation   ; Functions:
+
+int %main () {
+  %arg  = load int* %non_const
+  %val0 = call int %ffs(int %arg)
+  %val1 = call int %ffs(int 1)
+  %val2 = call int %ffs(int 2048)
+  %val3 = call int %ffsl(int 65536)
+  %val4 = call int %ffsll(long 1024)
+  %val5 = call int %ffsll(long 17179869184)
+  %val6 = call int %ffsll(long 1152921504606846976)
+  %rslt1 = add int %val1, %val2
+  %rslt2 = add int %val3, %val4
+  %rslt3 = add int %val5, %val6
+  %rslt4 = add int %rslt1, %rslt2
+  %rslt5 = add int %rslt4, %rslt3
+  %rslt6 = add int %rslt5, %val0
+  ret int %rslt5
+}