1 files changed, 25 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/bfx.ll b/test/CodeGen/ARM/bfx.ll
index 519c1353a387..394da9e157ff 100644
--- a/test/CodeGen/ARM/bfx.ll
+++ b/test/CodeGen/ARM/bfx.ll
@@ -26,3 +26,28 @@ define i32 @ubfx2(i32 %a) {
 	ret i32 %t2
 }
 
+; rdar://12870177
+define i32 @ubfx_opt(i32* nocapture %ctx, i32 %x) nounwind readonly ssp {
+entry:
+; CHECK: ubfx_opt
+; CHECK: lsr [[REG1:(lr|r[0-9]+)]], r1, #24
+; CHECK: ldr {{lr|r[0-9]+}}, [r0, [[REG1]], lsl #2]
+; CHECK: ubfx [[REG2:(lr|r[0-9]+)]], r1, #16, #8
+; CHECK: ldr {{lr|r[0-9]+}}, [r0, [[REG2]], lsl #2]
+; CHECK: ubfx [[REG3:(lr|r[0-9]+)]], r1, #8, #8
+; CHECK: ldr {{lr|r[0-9]+}}, [r0, [[REG3]], lsl #2]
+  %and = lshr i32 %x, 8
+  %shr = and i32 %and, 255
+  %and1 = lshr i32 %x, 16
+  %shr2 = and i32 %and1, 255
+  %shr4 = lshr i32 %x, 24
+  %arrayidx = getelementptr inbounds i32* %ctx, i32 %shr4
+  %0 = load i32* %arrayidx, align 4
+  %arrayidx5 = getelementptr inbounds i32* %ctx, i32 %shr2
+  %1 = load i32* %arrayidx5, align 4
+  %add = add i32 %1, %0
+  %arrayidx6 = getelementptr inbounds i32* %ctx, i32 %shr
+  %2 = load i32* %arrayidx6, align 4
+  %add7 = add i32 %add, %2
+  ret i32 %add7
+}