1 files changed, 17 insertions, 0 deletions
diff --git a/test/CodeGen/X86/sext-subreg.ll b/test/CodeGen/X86/sext-subreg.ll
new file mode 100644
index 0000000..b2b9f81
--- /dev/null
+++ b/test/CodeGen/X86/sext-subreg.ll
@@ -0,0 +1,17 @@
+; RUN: llc < %s -march=x86-64 | FileCheck %s
+; rdar://7529457
+
+define i64 @t(i64 %A, i64 %B, i32* %P, i64 *%P2) nounwind {
+; CHECK: t:
+; CHECK: movslq %e{{.*}}, %rax
+; CHECK: movq %rax
+; CHECK: movl %eax
+  %C = add i64 %A, %B
+  %D = trunc i64 %C to i32
+  volatile store i32 %D, i32* %P
+  %E = shl i64 %C, 32
+  %F = ashr i64 %E, 32  
+  volatile store i64 %F, i64 *%P2
+  volatile store i32 %D, i32* %P
+  ret i64 undef
+}