add testcase for r208237: do not collect undef terms

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208347 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Analysis/Delinearization/undef.ll b/test/Analysis/Delinearization/undef.ll
new file mode 100644 (file)
index 0000000..8ee64e3
--- /dev/null
+++ b/test/Analysis/Delinearization/undef.ll
@@ -0,0 +1,38 @@
+; RUN: opt < %s -analyze -delinearize
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+define void @foo(double* %Ey) {
+entry:
+  br i1 undef, label %for.cond55.preheader, label %for.end324
+
+for.cond55.preheader:
+  %iz.069 = phi i64 [ %inc323, %for.inc322 ], [ 0, %entry ]
+  br i1 undef, label %for.cond58.preheader, label %for.inc322
+
+for.cond58.preheader:
+  %iy.067 = phi i64 [ %inc320, %for.end ], [ 0, %for.cond55.preheader ]
+  br i1 undef, label %for.body60, label %for.end
+
+for.body60:
+  %ix.062 = phi i64 [ %inc, %for.body60 ], [ 0, %for.cond58.preheader ]
+  %0 = mul i64 %iz.069, undef
+  %tmp5 = add i64 %iy.067, %0
+  %tmp6 = mul i64 %tmp5, undef
+  %arrayidx69.sum = add i64 undef, %tmp6
+  %arrayidx70 = getelementptr inbounds double* %Ey, i64 %arrayidx69.sum
+  %1 = load double* %arrayidx70, align 8
+  %inc = add nsw i64 %ix.062, 1
+  br i1 false, label %for.body60, label %for.end
+
+for.end:
+  %inc320 = add nsw i64 %iy.067, 1
+  br i1 undef, label %for.cond58.preheader, label %for.inc322
+
+for.inc322:
+  %inc323 = add nsw i64 %iz.069, 1
+  br i1 undef, label %for.cond55.preheader, label %for.end324
+
+for.end324:
+  ret void
+}