Mark a few Thumb instructions commutable; just happened to spot this
while experimenting. I'm reasonably sure this is correct, but please
tell me if these instructions have some strange property which makes this
change unsafe.
llvm-svn: 73746
diff --git a/llvm/test/CodeGen/ARM/2009-06-18-ThumbCommuteMul.ll b/llvm/test/CodeGen/ARM/2009-06-18-ThumbCommuteMul.ll
new file mode 100644
index 0000000..9b2aba9
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/2009-06-18-ThumbCommuteMul.ll
@@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | llc -march=thumb | grep r0 | count 1
+
+define i32 @a(i32 %x, i32 %y) nounwind readnone {
+entry:
+ %mul = mul i32 %y, %x ; <i32> [#uses=1]
+ ret i32 %mul
+}
+