1 files changed, 36 insertions, 0 deletions
diff --git a/test/Transforms/SimplifyLibCalls/FFS.ll b/test/Transforms/SimplifyLibCalls/FFS.ll
new file mode 100644
index 000000000000..d6a504af867d
--- /dev/null
+++ b/test/Transforms/SimplifyLibCalls/FFS.ll
@@ -0,0 +1,36 @@
+; Test that the ToAsciiOptimizer works correctly
+; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \
+; RUN:   not grep {call.*@ffs}
+
+@non_const = external global i32		; <i32*> [#uses=1]
+
+declare i32 @ffs(i32)
+
+declare i32 @ffsl(i32)
+
+declare i32 @ffsll(i64)
+
+define i32 @main() {
+	%arg = load i32* @non_const		; <i32> [#uses=1]
+	%val0 = call i32 @ffs( i32 %arg )		; <i32> [#uses=1]
+	%val1 = call i32 @ffs( i32 1 )		; <i32> [#uses=1]
+	%val2 = call i32 @ffs( i32 2048 )		; <i32> [#uses=1]
+	%val3 = call i32 @ffsl( i32 65536 )		; <i32> [#uses=1]
+	%val4 = call i32 @ffsll( i64 1024 )		; <i32> [#uses=1]
+	%val5 = call i32 @ffsll( i64 17179869184 )		; <i32> [#uses=1]
+	%val6 = call i32 @ffsll( i64 1152921504606846976 )		; <i32> [#uses=1]
+	%rslt1 = add i32 %val1, %val2		; <i32> [#uses=1]
+	%rslt2 = add i32 %val3, %val4		; <i32> [#uses=1]
+	%rslt3 = add i32 %val5, %val6		; <i32> [#uses=1]
+	%rslt4 = add i32 %rslt1, %rslt2		; <i32> [#uses=1]
+	%rslt5 = add i32 %rslt4, %rslt3		; <i32> [#uses=2]
+	%rslt6 = add i32 %rslt5, %val0		; <i32> [#uses=0]
+	ret i32 %rslt5
+}
+
+
+; PR4206
+define i32 @a(i64) nounwind {
+        %2 = call i32 @ffsll(i64 %0)            ; <i32> [#uses=1]
+        ret i32 %2
+}