1 files changed, 20 insertions, 0 deletions
diff --git a/llvm/test/Transforms/SimplifyLibCalls/IsDigit.ll b/llvm/test/Transforms/SimplifyLibCalls/IsDigit.ll
new file mode 100644
index 00000000000..1386c14eadb
--- /dev/null
+++ b/llvm/test/Transforms/SimplifyLibCalls/IsDigit.ll
@@ -0,0 +1,20 @@
+; Test that the IsDigitOptimizer works correctly
+; RUN: llvm-upgrade < %s | llvm-as | opt -simplify-libcalls | llvm-dis | not grep 'call' 
+
+declare int %isdigit(int)
+declare int %isascii(int)
+
+implementation   ; Functions:
+
+int %main () {
+  %val1 = call int %isdigit(int 47)
+  %val2 = call int %isdigit(int 48)
+  %val3 = call int %isdigit(int 57)
+  %val4 = call int %isdigit(int 58)
+  %rslt1 = add int %val1, %val2
+  %rslt2 = add int %val3, %val4
+  %sum = add int %rslt1, %rslt2
+  %rslt = call int %isdigit(int %sum)
+  %tmp = call int %isascii(int %rslt)
+  ret int %tmp
+}