1 files changed, 36 insertions, 0 deletions
diff --git a/llvm/test/Transforms/IndVarSimplify/signed-trip-count.ll b/llvm/test/Transforms/IndVarSimplify/signed-trip-count.ll
new file mode 100644
index 00000000000..41968ac0518
--- /dev/null
+++ b/llvm/test/Transforms/IndVarSimplify/signed-trip-count.ll
@@ -0,0 +1,36 @@
+; RUN: opt < %s -indvars -S | FileCheck %s
+
+; Provide legal integer types.
+target datalayout = "n8:16:32:64"
+
+
+define void @foo(i64* nocapture %x, i32 %n) nounwind {
+; CHECK-LABEL: @foo(
+; CHECK-NOT: sext
+; CHECK: phi
+; CHECK-NOT: phi
+entry:
+	%tmp102 = icmp sgt i32 %n, 0		; <i1> [#uses=1]
+	br i1 %tmp102, label %bb.nph, label %return
+
+bb.nph:		; preds = %entry
+	br label %bb
+
+bb:		; preds = %bb7, %bb.nph
+	%i.01 = phi i32 [ %tmp6, %bb7 ], [ 0, %bb.nph ]		; <i32> [#uses=3]
+	%tmp1 = sext i32 %i.01 to i64		; <i64> [#uses=1]
+	%tmp4 = getelementptr i64, i64* %x, i32 %i.01		; <i64*> [#uses=1]
+	store i64 %tmp1, i64* %tmp4, align 8
+	%tmp6 = add i32 %i.01, 1		; <i32> [#uses=2]
+	br label %bb7
+
+bb7:		; preds = %bb
+	%tmp10 = icmp slt i32 %tmp6, %n		; <i1> [#uses=1]
+	br i1 %tmp10, label %bb, label %bb7.return_crit_edge
+
+bb7.return_crit_edge:		; preds = %bb7
+	br label %return
+
+return:		; preds = %bb7.return_crit_edge, %entry
+	ret void
+}