new testcase, where we should use a negative stride

llvm-svn: 35608

1 files changed, 20 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/ARM/arm-negative-stride.ll b/llvm/test/CodeGen/ARM/arm-negative-stride.ll
new file mode 100644
index 00000000000..272f2a597a2
--- /dev/null
+++ b/llvm/test/CodeGen/ARM/arm-negative-stride.ll
@@ -0,0 +1,20 @@
+; RUN: llvm-as < %s | llc -march=arm | grep -F 'str r1, [r3, -r0, lsl #2]'
+
+define void @test(i32* %P, i32 %A, i32 %i) {
+entry:
+        icmp eq i32 %i, 0               ; <i1>:0 [#uses=1]
+        br i1 %0, label %return, label %bb
+
+bb:             ; preds = %bb, %entry
+        %indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb ]          ; <i32> [#uses=2]
+        %i_addr.09.0 = sub i32 %i, %indvar              ; <i32> [#uses=1]
+        %tmp2 = getelementptr i32* %P, i32 %i_addr.09.0         ; <i32*> [#uses=1]
+        store i32 %A, i32* %tmp2
+        %indvar.next = add i32 %indvar, 1               ; <i32> [#uses=2]
+        icmp eq i32 %indvar.next, %i            ; <i1>:1 [#uses=1]
+        br i1 %1, label %return, label %bb
+
+return:         ; preds = %bb, %entry
+        ret void
+}
+