New testcase

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12920 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 24 insertions, 0 deletions

diff --git a/test/Transforms/SCCP/calltest.ll b/test/Transforms/SCCP/calltest.ll
new file mode 100644
index 0000000000..e88914d8dc
--- /dev/null
+++ b/test/Transforms/SCCP/calltest.ll
@@ -0,0 +1,24 @@
+; RUN: llvm-as < %s | opt -sccp -adce -simplifycfg | llvm-dis | 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)
+
+double %test(uint %param) {
+entry:
+	br label %Loop
+
+Loop:
+	%I2 = phi uint [ 0, %entry ], [ %I3, %Loop ]
+	%V  = phi double [ 1.0, %entry], [ %V2, %Loop ]
+
+	%V2 = call double %sqrt(double %V)
+
+	%I3 = add uint %I2, 1
+	%tmp.7 = setne uint %I3, %param
+	br bool %tmp.7, label %Loop, label %Exit
+
+Exit:
+	ret double %V
+}