1 files changed, 58 insertions, 0 deletions
diff --git a/test/Analysis/LoopAccessAnalysis/number-of-memchecks.ll b/test/Analysis/LoopAccessAnalysis/number-of-memchecks.ll
new file mode 100644
index 0000000..f9871c6
--- /dev/null
+++ b/test/Analysis/LoopAccessAnalysis/number-of-memchecks.ll
@@ -0,0 +1,58 @@
+; RUN: opt -loop-accesses -analyze < %s | FileCheck %s
+
+; 3 reads and 3 writes should need 12 memchecks
+
+target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
+target triple = "aarch64--linux-gnueabi"
+
+; CHECK: Memory dependences are safe with run-time checks
+; Memory dependecies have labels starting from 0, so in
+; order to verify that we have n checks, we look for
+; (n-1): and not n:.
+
+; CHECK: Run-time memory checks:
+; CHECK-NEXT: 0:
+; CHECK: 11:
+; CHECK-NOT: 12:
+
+define void @testf(i16* %a,
+               i16* %b,
+               i16* %c,
+               i16* %d,
+               i16* %e,
+               i16* %f) {
+entry:
+  br label %for.body
+
+for.body:                                         ; preds = %for.body, %entry
+  %ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
+
+  %add = add nuw nsw i64 %ind, 1
+
+  %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %ind
+  %loadA = load i16, i16* %arrayidxA, align 2
+
+  %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %ind
+  %loadB = load i16, i16* %arrayidxB, align 2
+
+  %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %ind
+  %loadC = load i16, i16* %arrayidxC, align 2
+
+  %mul = mul i16 %loadB, %loadA
+  %mul1 = mul i16 %mul, %loadC
+
+  %arrayidxD = getelementptr inbounds i16, i16* %d, i64 %ind
+  store i16 %mul1, i16* %arrayidxD, align 2
+
+  %arrayidxE = getelementptr inbounds i16, i16* %e, i64 %ind
+  store i16 %mul, i16* %arrayidxE, align 2
+
+  %arrayidxF = getelementptr inbounds i16, i16* %f, i64 %ind
+  store i16 %mul1, i16* %arrayidxF, align 2
+
+  %exitcond = icmp eq i64 %add, 20
+  br i1 %exitcond, label %for.end, label %for.body
+
+for.end:                                          ; preds = %for.body
+  ret void
+}