1 files changed, 21 insertions, 0 deletions
diff --git a/test/Transforms/SCCP/calltest.ll b/test/Transforms/SCCP/calltest.ll
new file mode 100644
index 0000000..9dec22f
--- /dev/null
+++ b/test/Transforms/SCCP/calltest.ll
@@ -0,0 +1,21 @@
+; RUN: opt < %s -sccp -loop-deletion -simplifycfg -S | not grep br
+
+; No matter how hard you try, sqrt(1.0) is always 1.0.  This allows the
+; optimizer to delete this loop.
+
+declare double @sqrt(double)
+
+define double @test(i32 %param) {
+entry:
+	br label %Loop
+Loop:		; preds = %Loop, %entry
+	%I2 = phi i32 [ 0, %entry ], [ %I3, %Loop ]		; <i32> [#uses=1]
+	%V = phi double [ 1.000000e+00, %entry ], [ %V2, %Loop ]		; <double> [#uses=2]
+	%V2 = call double @sqrt( double %V )		; <double> [#uses=1]
+	%I3 = add i32 %I2, 1		; <i32> [#uses=2]
+	%tmp.7 = icmp ne i32 %I3, %param		; <i1> [#uses=1]
+	br i1 %tmp.7, label %Loop, label %Exit
+Exit:		; preds = %Loop
+	ret double %V
+}
+