New testcase for PHI folding

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2495 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/phi.ll b/test/Transforms/InstCombine/phi.ll
new file mode 100644 (file)
index 0000000..f56fbe2
--- /dev/null
+++ b/test/Transforms/InstCombine/phi.ll
@@ -0,0 +1,17 @@
+; This test makes sure that these instructions are properly eliminated.
+;
+
+; RUN: if as < %s | opt -instcombine -dce | dis | grep phi
+; RUN: then exit 1
+; RUN: else exit 0
+; RUN: fi
+
+implementation
+
+int "test1"(int %A) {
+BB0:   br label %BB1
+BB1:
+       %B = phi int [%A, %BB0]     ; Combine away one argument PHI nodes
+       ret int %B
+}
+