1 files changed, 30 insertions, 0 deletions
diff --git a/test/Transforms/LoopVectorize/duplicated-metadata.ll b/test/Transforms/LoopVectorize/duplicated-metadata.ll
new file mode 100644
index 0000000..8353dca
--- /dev/null
+++ b/test/Transforms/LoopVectorize/duplicated-metadata.ll
@@ -0,0 +1,30 @@
+; RUN: opt < %s -loop-vectorize -S 2>&1 | FileCheck %s
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+; This test makes sure we don't duplicate the loop vectorizer's metadata
+; while marking them as already vectorized (by setting width = 1), even
+; at lower optimization levels, where no extra cleanup is done
+
+define void @_Z3fooPf(float* %a) {
+entry:
+  br label %for.body
+
+for.body:                                         ; preds = %for.body, %entry
+  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
+  %arrayidx = getelementptr inbounds float* %a, i64 %indvars.iv
+  %p = load float* %arrayidx, align 4
+  %mul = fmul float %p, 2.000000e+00
+  store float %mul, float* %arrayidx, align 4
+  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
+  %exitcond = icmp eq i64 %indvars.iv.next, 1024
+  br i1 %exitcond, label %for.end, label %for.body, !llvm.loop !0
+
+for.end:                                          ; preds = %for.body
+  ret void
+}
+
+!0 = metadata !{metadata !0, metadata !1}
+!1 = metadata !{metadata !"llvm.loop.vectorize.width", i32 4}
+; CHECK-NOT: !{metadata !"llvm.loop.vectorize.width", i32 4}
+; CHECK: !{metadata !"llvm.loop.interleave.count", i32 1}