1 files changed, 47 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/PowerPC/stdux-constuse.ll b/llvm/test/CodeGen/PowerPC/stdux-constuse.ll
new file mode 100644
index 00000000000..e62d438014e
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/stdux-constuse.ll
@@ -0,0 +1,47 @@
+; RUN: llc -mcpu=a2 -disable-lsr < %s | FileCheck %s
+target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+
+define i32 @test1(i64 %add, i64* %ptr) nounwind {
+entry:
+  %p1 = getelementptr i64* %ptr, i64 144115188075855
+  br label %for.cond2.preheader
+
+for.cond2.preheader:
+  %nl.018 = phi i32 [ 0, %entry ], [ %inc9, %for.end ]
+  br label %for.body4
+
+for.body4:
+  %lsr.iv = phi i32 [ %lsr.iv.next, %for.body4 ], [ 16000, %for.cond2.preheader ]
+  %i0 = phi i64* [ %p1, %for.cond2.preheader ], [ %i6, %for.body4 ]
+  %i6 = getelementptr i64* %i0, i64 400000
+  %i7 = getelementptr i64* %i6, i64 300000
+  %i8 = getelementptr i64* %i6, i64 200000
+  %i9 = getelementptr i64* %i6, i64 100000
+  store i64 %add, i64* %i6, align 32
+  store i64 %add, i64* %i7, align 32
+  store i64 %add, i64* %i8, align 32
+  store i64 %add, i64* %i9, align 32
+  %lsr.iv.next = add i32 %lsr.iv, -16
+  %exitcond.15 = icmp eq i32 %lsr.iv.next, 0
+  br i1 %exitcond.15, label %for.end, label %for.body4
+
+; Make sure that we generate the most compact form of this loop with no
+; unnecessary moves
+; CHECK: @test1
+; CHECK: mtctr
+; CHECK: stdux
+; CHECK-NEXT: stdx
+; CHECK-NEXT: stdx
+; CHECK-NEXT: stdx
+; CHECK-NEXT: bdnz
+
+for.end:
+  %inc9 = add nsw i32 %nl.018, 1
+  %exitcond = icmp eq i32 %inc9, 400000
+  br i1 %exitcond, label %for.end10, label %for.cond2.preheader
+
+for.end10:
+  ret i32 0
+}
+