1 files changed, 36 insertions, 0 deletions
diff --git a/test/Analysis/ScalarEvolution/2008-07-12-UnneededSelect1.ll b/test/Analysis/ScalarEvolution/2008-07-12-UnneededSelect1.ll
new file mode 100644
index 0000000..9db9b71
--- /dev/null
+++ b/test/Analysis/ScalarEvolution/2008-07-12-UnneededSelect1.ll
@@ -0,0 +1,36 @@
+; RUN: opt < %s -analyze -scalar-evolution |& not grep smax
+; PR2261
+
+@lut = common global [256 x i8] zeroinitializer, align 32		; <[256 x i8]*> [#uses=1]
+
+define void @foo(i32 %count, i32* %srcptr, i32* %dstptr) nounwind  {
+entry:
+	icmp sgt i32 %count, 0		; <i1>:0 [#uses=1]
+	br i1 %0, label %bb.nph, label %return
+
+bb.nph:		; preds = %entry
+	br label %bb
+
+bb:		; preds = %bb1, %bb.nph
+	%j.01 = phi i32 [ %8, %bb1 ], [ 0, %bb.nph ]		; <i32> [#uses=1]
+	load i32* %srcptr, align 4		; <i32>:1 [#uses=2]
+	and i32 %1, 255		; <i32>:2 [#uses=1]
+	and i32 %1, -256		; <i32>:3 [#uses=1]
+	getelementptr [256 x i8]* @lut, i32 0, i32 %2		; <i8*>:4 [#uses=1]
+	load i8* %4, align 1		; <i8>:5 [#uses=1]
+	zext i8 %5 to i32		; <i32>:6 [#uses=1]
+	or i32 %6, %3		; <i32>:7 [#uses=1]
+	store i32 %7, i32* %dstptr, align 4
+	add i32 %j.01, 1		; <i32>:8 [#uses=2]
+	br label %bb1
+
+bb1:		; preds = %bb
+	icmp slt i32 %8, %count		; <i1>:9 [#uses=1]
+	br i1 %9, label %bb, label %bb1.return_crit_edge
+
+bb1.return_crit_edge:		; preds = %bb1
+	br label %return
+
+return:		; preds = %bb1.return_crit_edge, %entry
+	ret void
+}