From fd1e739a442b09a3f84eedfffda10b2263d76faa Mon Sep 17 00:00:00 2001 From: David Majnemer Date: Tue, 3 Feb 2015 23:04:06 +0000 Subject: CodeGen: Copy-ctorm must obey the destination's alignment requirement We would synthesize memcpy intrinsics when emitting calls to trivial C++ constructors but we wouldn't take into account the alignment of the destination. llvm-svn: 228061 --- clang/test/CodeGenCXX/copy-constructor-elim.cpp | 14 ++++++++++++++ 1 file changed, 14 insertions(+) (limited to 'clang/test/CodeGenCXX/copy-constructor-elim.cpp') diff --git a/clang/test/CodeGenCXX/copy-constructor-elim.cpp b/clang/test/CodeGenCXX/copy-constructor-elim.cpp index 8e9bee97377..d82af28655c 100644 --- a/clang/test/CodeGenCXX/copy-constructor-elim.cpp +++ b/clang/test/CodeGenCXX/copy-constructor-elim.cpp @@ -43,3 +43,17 @@ int main() { S s; Call(s); } + +struct V { + int x; +}; + +typedef V V_over_aligned __attribute((aligned(8))); +extern const V_over_aligned gv1 = {}; + +extern "C" V f() { return gv1; } + +// Make sure that we obey the destination's alignment requirements when emitting +// the copy. +// CHECK-LABEL: define i32 @f() +// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64({{.*}}, i8* bitcast (%struct.V* @gv1 to i8*), i64 4, i32 4, i1 false) -- cgit v1.2.3