New testcase, corresponding to phi_promote.ll

llvm-svn: 12778

1 files changed, 17 insertions, 0 deletions

diff --git a/llvm/test/Regression/Transforms/ScalarRepl/select_promote.ll b/llvm/test/Regression/Transforms/ScalarRepl/select_promote.ll
new file mode 100644
index 00000000000..18b55a8528b
--- /dev/null
+++ b/llvm/test/Regression/Transforms/ScalarRepl/select_promote.ll
@@ -0,0 +1,17 @@
+; Test promotion of loads that use the result of a select instruction.
+
+; RUN: llvm-as < %s | opt -mem2reg | llvm-dis | not grep alloca
+
+int %main() {
+        %mem_tmp.0 = alloca int         ; <int*> [#uses=3]
+        %mem_tmp.1 = alloca int         ; <int*> [#uses=3]
+        store int 0, int* %mem_tmp.0
+        store int 1, int* %mem_tmp.1
+        %tmp.1.i = load int* %mem_tmp.1         ; <int> [#uses=1]
+        %tmp.3.i = load int* %mem_tmp.0         ; <int> [#uses=1]
+        %tmp.4.i = setle int %tmp.1.i, %tmp.3.i         ; <bool> [#uses=1]
+        %mem_tmp.i.0 = select bool %tmp.4.i, int* %mem_tmp.1, int* %mem_tmp.0           ; <int*> [#uses=1]
+        %tmp.3 = load int* %mem_tmp.i.0         ; <int> [#uses=1]
+        ret int %tmp.3
+}
+