From 173a4f43a911175643bda81ee675e8d9269056ea Mon Sep 17 00:00:00 2001 From: dim Date: Mon, 24 Nov 2014 09:15:30 +0000 Subject: Vendor import of clang RELEASE_350/final tag r216957 (effectively, 3.5.0 release): https://llvm.org/svn/llvm-project/cfe/tags/RELEASE_350/final@216957 --- test/CodeGenCXX/arm64-empty-struct.cpp | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 test/CodeGenCXX/arm64-empty-struct.cpp (limited to 'test/CodeGenCXX/arm64-empty-struct.cpp') diff --git a/test/CodeGenCXX/arm64-empty-struct.cpp b/test/CodeGenCXX/arm64-empty-struct.cpp new file mode 100644 index 0000000..6fa4e95 --- /dev/null +++ b/test/CodeGenCXX/arm64-empty-struct.cpp @@ -0,0 +1,27 @@ +// RUN: %clang_cc1 -triple arm64-apple-ios -target-abi darwinpcs -emit-llvm -o - %s | FileCheck %s +struct Empty {}; + +Empty emptyvar; + +int take_args(int a, ...) { + __builtin_va_list l; + __builtin_va_start(l, a); +// CHECK: call void @llvm.va_start + + emptyvar = __builtin_va_arg(l, Empty); +// CHECK: load i8** +// CHECK-NOT: getelementptr +// CHECK: [[EMPTY_PTR:%[a-zA-Z0-9._]+]] = bitcast i8* {{%[a-zA-Z0-9._]+}} to %struct.Empty* + + // It's conceivable that EMPTY_PTR may not actually be a valid pointer + // (e.g. it's at the very bottom of the stack and the next page is + // invalid). This doesn't matter provided it's never loaded (there's no + // well-defined way to tell), but it becomes a problem if we do try to use it. +// CHECK-NOT: load %struct.Empty* [[EMPTY_PTR]] + + int i = __builtin_va_arg(l, int); +// CHECK: va_arg i8** {{%[a-zA-Z0-9._]+}}, i32 + + __builtin_va_end(l); + return i; +} -- cgit v1.1