New testcase for the deadreturnvalue deletion extension to -deadargelim

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9389 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 55 insertions, 0 deletions

diff --git a/test/Transforms/DeadArgElim/deadretval.ll b/test/Transforms/DeadArgElim/deadretval.ll
new file mode 100644
index 0000000000..33b4bd7cb6
--- /dev/null
+++ b/test/Transforms/DeadArgElim/deadretval.ll
@@ -0,0 +1,19 @@
+; RUN: llvm-as < %s | opt -deadargelim | llvm-dis | not grep DEAD
+
+implementation
+
+internal int %test(int %DEADARG) {  ; Dead arg only used by dead retval
+	ret int %DEADARG
+}
+
+int %test2(int %A) {
+	%DEAD = call int %test(int %A)
+	ret int 123
+}
+
+int %test3() {
+	%X = call int %test2(int 3232)
+	%Y = add int %X, -123
+	ret int %Y
+}
+
diff --git a/test/Transforms/DeadArgElim/deadretval2.ll b/test/Transforms/DeadArgElim/deadretval2.ll
new file mode 100644
index 0000000000..2596fa66fa
--- /dev/null
+++ b/test/Transforms/DeadArgElim/deadretval2.ll
@@ -0,0 +1,36 @@
+; RUN: llvm-as < %s | opt -deadargelim -die | llvm-dis | not grep DEAD
+
+%P = external global int 
+
+implementation
+
+
+internal int %test(int %DEADARG) {  ; Dead arg only used by dead retval
+        ret int %DEADARG
+}
+
+internal int %test2(int %DEADARG) {
+	%DEADRETVAL = call int %test(int %DEADARG)
+	ret int %DEADRETVAL
+}
+
+void %test3(int %X) {
+	%DEADRETVAL = call int %test2(int %X)
+	ret void
+}
+
+internal int %foo() {
+	%DEAD = load int* %P
+	ret int %DEAD
+}
+
+internal int %id(int %X) {
+	ret int %X
+}
+
+void %test4() {
+	%DEAD = call int %foo()
+	%DEAD2 = call int %id(int %DEAD)
+	ret void
+}
+