1 files changed, 111 insertions, 0 deletions
diff --git a/test/Transforms/SLPVectorizer/AArch64/getelementptr.ll b/test/Transforms/SLPVectorizer/AArch64/getelementptr.ll
new file mode 100644
index 0000000000000..e9b71963530c0
--- /dev/null
+++ b/test/Transforms/SLPVectorizer/AArch64/getelementptr.ll
@@ -0,0 +1,111 @@
+; RUN: opt -S -slp-vectorizer -slp-threshold=-18 -dce -instcombine < %s | FileCheck %s
+
+target datalayout = "e-m:e-i32:64-i128:128-n32:64-S128"
+target triple = "aarch64--linux-gnu"
+
+; These tests check that we remove from consideration pairs of seed
+; getelementptrs when they are known to have a constant difference. Such pairs
+; are likely not good candidates for vectorization since one can be computed
+; from the other. We use an unprofitable threshold to force vectorization.
+;
+; int getelementptr(int *g, int n, int w, int x, int y, int z) {
+;   int sum = 0;
+;   for (int i = 0; i < n ; ++i) {
+;     sum += g[2*i + w]; sum += g[2*i + x];
+;     sum += g[2*i + y]; sum += g[2*i + z];
+;   }
+;   return sum;
+; }
+;
+
+; CHECK-LABEL: @getelementptr_4x32
+;
+; CHECK: [[A:%[a-zA-Z0-9.]+]] = add nsw <4 x i32>
+; CHECK: [[X:%[a-zA-Z0-9.]+]] = extractelement <4 x i32> [[A]]
+; CHECK: sext i32 [[X]] to i64
+;
+define i32 @getelementptr_4x32(i32* nocapture readonly %g, i32 %n, i32 %x, i32 %y, i32 %z) {
+entry:
+  %cmp31 = icmp sgt i32 %n, 0
+  br i1 %cmp31, label %for.body.preheader, label %for.cond.cleanup
+
+for.body.preheader:
+  br label %for.body
+
+for.cond.cleanup.loopexit:
+  br label %for.cond.cleanup
+
+for.cond.cleanup:
+  %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add16, %for.cond.cleanup.loopexit ]
+  ret i32 %sum.0.lcssa
+
+for.body:
+  %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
+  %sum.032 = phi i32 [ 0, %for.body.preheader ], [ %add16, %for.body ]
+  %t4 = shl nsw i32 %indvars.iv, 1
+  %t5 = add nsw i32 %t4, 0
+  %arrayidx = getelementptr inbounds i32, i32* %g, i32 %t5
+  %t6 = load i32, i32* %arrayidx, align 4
+  %add1 = add nsw i32 %t6, %sum.032
+  %t7 = add nsw i32 %t4, %x
+  %arrayidx5 = getelementptr inbounds i32, i32* %g, i32 %t7
+  %t8 = load i32, i32* %arrayidx5, align 4
+  %add6 = add nsw i32 %add1, %t8
+  %t9 = add nsw i32 %t4, %y
+  %arrayidx10 = getelementptr inbounds i32, i32* %g, i32 %t9
+  %t10 = load i32, i32* %arrayidx10, align 4
+  %add11 = add nsw i32 %add6, %t10
+  %t11 = add nsw i32 %t4, %z
+  %arrayidx15 = getelementptr inbounds i32, i32* %g, i32 %t11
+  %t12 = load i32, i32* %arrayidx15, align 4
+  %add16 = add nsw i32 %add11, %t12
+  %indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
+  %exitcond = icmp eq i32 %indvars.iv.next , %n
+  br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
+}
+
+; CHECK-LABEL: @getelementptr_2x32
+;
+; CHECK: [[A:%[a-zA-Z0-9.]+]] = add nsw <2 x i32>
+; CHECK: [[X:%[a-zA-Z0-9.]+]] = extractelement <2 x i32> [[A]]
+; CHECK: sext i32 [[X]] to i64
+;
+define i32 @getelementptr_2x32(i32* nocapture readonly %g, i32 %n, i32 %x, i32 %y, i32 %z) {
+entry:
+  %cmp31 = icmp sgt i32 %n, 0
+  br i1 %cmp31, label %for.body.preheader, label %for.cond.cleanup
+
+for.body.preheader:
+  br label %for.body
+
+for.cond.cleanup.loopexit:
+  br label %for.cond.cleanup
+
+for.cond.cleanup:
+  %sum.0.lcssa = phi i32 [ 0, %entry ], [ %add16, %for.cond.cleanup.loopexit ]
+  ret i32 %sum.0.lcssa
+
+for.body:
+  %indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
+  %sum.032 = phi i32 [ 0, %for.body.preheader ], [ %add16, %for.body ]
+  %t4 = shl nsw i32 %indvars.iv, 1
+  %t5 = add nsw i32 %t4, 0
+  %arrayidx = getelementptr inbounds i32, i32* %g, i32 %t5
+  %t6 = load i32, i32* %arrayidx, align 4
+  %add1 = add nsw i32 %t6, %sum.032
+  %t7 = add nsw i32 %t4, 1
+  %arrayidx5 = getelementptr inbounds i32, i32* %g, i32 %t7
+  %t8 = load i32, i32* %arrayidx5, align 4
+  %add6 = add nsw i32 %add1, %t8
+  %t9 = add nsw i32 %t4, %y
+  %arrayidx10 = getelementptr inbounds i32, i32* %g, i32 %t9
+  %t10 = load i32, i32* %arrayidx10, align 4
+  %add11 = add nsw i32 %add6, %t10
+  %t11 = add nsw i32 %t4, %z
+  %arrayidx15 = getelementptr inbounds i32, i32* %g, i32 %t11
+  %t12 = load i32, i32* %arrayidx15, align 4
+  %add16 = add nsw i32 %add11, %t12
+  %indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
+  %exitcond = icmp eq i32 %indvars.iv.next , %n
+  br i1 %exitcond, label %for.cond.cleanup.loopexit, label %for.body
+}