Test case for r140670: indvars should hoist sext.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140671 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/IndVarSimplify/2011-09-27-hoistsext.ll b/test/Transforms/IndVarSimplify/2011-09-27-hoistsext.ll
new file mode 100644
index 0000000..0737489
--- /dev/null
+++ b/test/Transforms/IndVarSimplify/2011-09-27-hoistsext.ll
@@ -0,0 +1,28 @@
+; RUN: opt < %s -indvars -S | FileCheck %s
+; Test indvars' ability to hoist new sext created by WidenIV.
+; From ffbench.
+
+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-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
+define internal double @fourn(double* %data, i32 %x, i32 %y, i32 %n) nounwind {
+; CHECK: entry:
+; CHECK: sext
+; CHECK: sext
+entry:
+ br label %for.body
+
+; CHECK: for.body:
+; CHECK-NOT: sext
+; CHECK: br
+for.body:
+ %i2.115 = phi i32 [ 0, %entry ], [ %add249, %for.body ]
+ %add174 = add nsw i32 %i2.115, %x
+ %idxprom177 = sext i32 %add174 to i64
+ %arrayidx179 = getelementptr inbounds double* %data, i64 %idxprom177
+ %tmp180 = load double* %arrayidx179, align 8
+ %add249 = add nsw i32 %i2.115, %y
+ %cmp168 = icmp sgt i32 %add249, %n
+ br i1 %cmp168, label %exit, label %for.body
+
+exit:
+ ret double %tmp180
+}
