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-rw-r--r--test/Transforms/ObjCARC/tail-call-invariant-enforcement.ll74
1 files changed, 74 insertions, 0 deletions
diff --git a/test/Transforms/ObjCARC/tail-call-invariant-enforcement.ll b/test/Transforms/ObjCARC/tail-call-invariant-enforcement.ll
new file mode 100644
index 0000000000000..26cd67727e6a6
--- /dev/null
+++ b/test/Transforms/ObjCARC/tail-call-invariant-enforcement.ll
@@ -0,0 +1,74 @@
+; RUN: opt -objc-arc -S < %s | FileCheck %s
+
+declare i8* @objc_release(i8* %x)
+declare i8* @objc_retain(i8* %x)
+declare i8* @objc_autorelease(i8* %x)
+declare i8* @objc_autoreleaseReturnValue(i8* %x)
+declare i8* @objc_retainAutoreleasedReturnValue(i8* %x)
+
+; Never tail call objc_autorelease.
+define i8* @test0(i8* %x) {
+entry:
+ ; CHECK: %tmp0 = call i8* @objc_autorelease(i8* %x)
+ %tmp0 = call i8* @objc_autorelease(i8* %x)
+ ; CHECK: %tmp1 = call i8* @objc_autorelease(i8* %x)
+ %tmp1 = tail call i8* @objc_autorelease(i8* %x)
+
+ ret i8* %x
+}
+
+; Always tail call autoreleaseReturnValue.
+define i8* @test1(i8* %x) {
+entry:
+ ; CHECK: %tmp0 = tail call i8* @objc_autoreleaseReturnValue(i8* %x)
+ %tmp0 = call i8* @objc_autoreleaseReturnValue(i8* %x)
+ ; CHECK: %tmp1 = tail call i8* @objc_autoreleaseReturnValue(i8* %x)
+ %tmp1 = tail call i8* @objc_autoreleaseReturnValue(i8* %x)
+ ret i8* %x
+}
+
+; Always tail call objc_retain.
+define i8* @test2(i8* %x) {
+entry:
+ ; CHECK: %tmp0 = tail call i8* @objc_retain(i8* %x)
+ %tmp0 = call i8* @objc_retain(i8* %x)
+ ; CHECK: %tmp1 = tail call i8* @objc_retain(i8* %x)
+ %tmp1 = tail call i8* @objc_retain(i8* %x)
+ ret i8* %x
+}
+
+define i8* @tmp(i8* %x) {
+ ret i8* %x
+}
+
+; Always tail call objc_retainAutoreleasedReturnValue.
+define i8* @test3(i8* %x) {
+entry:
+ %y = call i8* @tmp(i8* %x)
+ ; CHECK: %tmp0 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %y)
+ %tmp0 = call i8* @objc_retainAutoreleasedReturnValue(i8* %y)
+ %z = call i8* @tmp(i8* %x)
+ ; CHECK: %tmp1 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %z)
+ %tmp1 = tail call i8* @objc_retainAutoreleasedReturnValue(i8* %z)
+ ret i8* %x
+}
+
+; By itself, we should never change whether or not objc_release is tail called.
+define i8* @test4(i8* %x) {
+entry:
+ ; CHECK: %tmp0 = call i8* @objc_release(i8* %x)
+ %tmp0 = call i8* @objc_release(i8* %x)
+ ; CHECK: %tmp1 = tail call i8* @objc_release(i8* %x)
+ %tmp1 = tail call i8* @objc_release(i8* %x)
+ ret i8* %x
+}
+
+; If we convert a tail called @objc_autoreleaseReturnValue to an
+; @objc_autorelease, ensure that the tail call is removed.
+define i8* @test5(i8* %x) {
+entry:
+ ; CHECK: %tmp0 = call i8* @objc_autorelease(i8* %x)
+ %tmp0 = tail call i8* @objc_autoreleaseReturnValue(i8* %x)
+ ret i8* %tmp0
+}
+