Do not issue identity copies.
llvm-svn: 52373
diff --git a/llvm/test/CodeGen/X86/2008-06-16-SubregsBug.ll b/llvm/test/CodeGen/X86/2008-06-16-SubregsBug.ll
new file mode 100644
index 0000000..75513b6
--- /dev/null
+++ b/llvm/test/CodeGen/X86/2008-06-16-SubregsBug.ll
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | llc -mtriple=i386-apple-darwin | grep mov | count 4
+
+define i16 @test(i16* %tmp179) nounwind {
+ %tmp180 = load i16* %tmp179, align 2 ; <i16> [#uses=2]
+ %tmp184 = and i16 %tmp180, -1024 ; <i16> [#uses=1]
+ %tmp186 = icmp eq i16 %tmp184, -32768 ; <i1> [#uses=1]
+ br i1 %tmp186, label %bb189, label %bb288
+
+bb189: ; preds = %0
+ ret i16 %tmp180
+
+bb288: ; preds = %0
+ ret i16 32
+}