diff options
Diffstat (limited to 'test/Transforms/GVN/rle.ll')
-rw-r--r-- | test/Transforms/GVN/rle.ll | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/test/Transforms/GVN/rle.ll b/test/Transforms/GVN/rle.ll index 2f0d2eb..9e08004 100644 --- a/test/Transforms/GVN/rle.ll +++ b/test/Transforms/GVN/rle.ll @@ -26,6 +26,15 @@ define i8 @crash0({i32, i32} %A, {i32, i32}* %P) { ret i8 %Y } +;; No PR filed, crashed in CaptureTracker. +declare void @helper() +define void @crash1() { + tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* undef, i8* undef, i64 undef, i32 1, i1 false) nounwind + %tmp = load i8* bitcast (void ()* @helper to i8*) + %x = icmp eq i8 %tmp, 15 + ret void +} + ;;===----------------------------------------------------------------------===;; ;; Store -> Load and Load -> Load forwarding where src and dst are different @@ -642,3 +651,28 @@ declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) nounwind declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind +;;===----------------------------------------------------------------------===;; +;; Load -> Store dependency which isn't interfered with by a call that happens +;; before the pointer was captured. +;;===----------------------------------------------------------------------===;; + +%class.X = type { [8 x i8] } + +@_ZTV1X = weak_odr constant [5 x i8*] zeroinitializer +@_ZTV1Y = weak_odr constant [5 x i8*] zeroinitializer + +declare void @use() +declare void @use3(i8***, i8**) + +; PR8908 +define void @test_escape1() nounwind { + %x = alloca i8**, align 8 + store i8** getelementptr inbounds ([5 x i8*]* @_ZTV1X, i64 0, i64 2), i8*** %x, align 8 + call void @use() nounwind + %DEAD = load i8*** %x, align 8 + call void @use3(i8*** %x, i8** %DEAD) nounwind + ret void +; CHECK: test_escape1 +; CHECK-NOT: DEAD +; CHECK: ret +} |