1 files changed, 24 insertions, 0 deletions
diff --git a/test/CodeGen/X86/bswap.ll b/test/CodeGen/X86/bswap.ll
new file mode 100644
index 0000000..4749ea8
--- /dev/null
+++ b/test/CodeGen/X86/bswap.ll
@@ -0,0 +1,24 @@
+; bswap should be constant folded when it is passed a constant argument
+
+; RUN: llvm-upgrade < %s | llvm-as | llc -march=x86 | \
+; RUN:   grep bswapl | wc -l | grep 3
+; RUN: llvm-upgrade < %s | llvm-as | llc -march=x86 | grep rolw | wc -l | grep 1
+
+declare ushort %llvm.bswap.i16(ushort)
+declare uint %llvm.bswap.i32(uint)
+declare ulong %llvm.bswap.i64(ulong)
+
+ushort %W(ushort %A) {
+	%Z = call ushort %llvm.bswap.i16(ushort %A)
+	ret ushort %Z
+}
+
+uint %X(uint %A) {
+	%Z = call uint %llvm.bswap.i32(uint %A)
+	ret uint %Z
+}
+
+ulong %Y(ulong %A) {
+	%Z = call ulong %llvm.bswap.i64(ulong %A)
+	ret ulong %Z
+}