Tweak the expansion code for BIT_CONVERT to generate better code
converting from an MMX vector to an i64.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@73024 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/X86/2009-06-07-ExpandMMXBitcast.ll b/test/CodeGen/X86/2009-06-07-ExpandMMXBitcast.ll
new file mode 100644
index 0000000..56015c6
--- /dev/null
+++ b/test/CodeGen/X86/2009-06-07-ExpandMMXBitcast.ll
@@ -0,0 +1,10 @@
+; RUN: llvm-as < %s | llc | grep movl | count 2
+
+define i64 @a(i32 %a, i32 %b) nounwind readnone {
+entry:
+ %0 = insertelement <2 x i32> undef, i32 %a, i32 0 ; <<2 x i32>> [#uses=1]
+ %1 = insertelement <2 x i32> %0, i32 %b, i32 1 ; <<2 x i32>> [#uses=1]
+ %conv = bitcast <2 x i32> %1 to i64 ; <i64> [#uses=1]
+ ret i64 %conv
+}
+