Canonicalize bitcasts between types like <1 x i64> and i64 to
insertelement/extractelement.
I'm not entirely sure this is precisely what we want to do: should we
prefer bitcast(insertelement) or insertelement(bitcast)? Similarly. should we
prefer extractelement(bitcast) or bitcast(extractelement)?
llvm-svn: 76345
diff --git a/llvm/test/Transforms/InstCombine/bitcast-vec-canon.ll b/llvm/test/Transforms/InstCombine/bitcast-vec-canon.ll
new file mode 100644
index 0000000..6bb986a
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/bitcast-vec-canon.ll
@@ -0,0 +1,22 @@
+; RUN: llvm-as < %s | opt -instcombine | llvm-dis | grep element | count 4
+
+define double @a(<1 x i64> %y) {
+ %c = bitcast <1 x i64> %y to double
+ ret double %c
+}
+
+define i64 @b(<1 x i64> %y) {
+ %c = bitcast <1 x i64> %y to i64
+ ret i64 %c
+}
+
+define <1 x i64> @c(double %y) {
+ %c = bitcast double %y to <1 x i64>
+ ret <1 x i64> %c
+}
+
+define <1 x i64> @d(i64 %y) {
+ %c = bitcast i64 %y to <1 x i64>
+ ret <1 x i64> %c
+}
+