auto merge of rust-lang#9832 : luqmana/rust/sps, r=alexcrichton

Fixes rust-lang#9830.

Author: bors

src/librustc/middle/trans/adt.rs

@@ -505,26 +505,27 @@ pub fn trans_const(ccx: &mut CrateContext, r: &Repr, discr: Disr,
         }
         Univariant(ref st, _dro) => {
             assert_eq!(discr, 0);
-            C_struct(build_const_struct(ccx, st, vals))
+            let contents = build_const_struct(ccx, st, vals);
+            C_struct(contents, st.packed)
         }
         General(ref cases) => {
             let case = &cases[discr];
             let max_sz = cases.iter().map(|x| x.size).max().unwrap();
             let discr_ty = C_disr(ccx, discr);
             let contents = build_const_struct(ccx, case,
                                               ~[discr_ty] + vals);
-            C_struct(contents + &[padding(max_sz - case.size)])
+            C_struct(contents + &[padding(max_sz - case.size)], false)
         }
         NullablePointer{ nonnull: ref nonnull, nndiscr, ptrfield, _ } => {
             if discr == nndiscr {
-                C_struct(build_const_struct(ccx, nonnull, vals))
+                C_struct(build_const_struct(ccx, nonnull, vals), false)
             } else {
                 assert_eq!(vals.len(), 0);
                 let vals = do nonnull.fields.iter().enumerate().map |(i, &ty)| {
                     let llty = type_of::sizing_type_of(ccx, ty);
                     if i == ptrfield { C_null(llty) } else { C_undef(llty) }
                 }.collect::<~[ValueRef]>();
-                C_struct(build_const_struct(ccx, nonnull, vals))
+                C_struct(build_const_struct(ccx, nonnull, vals), false)
             }
         }
     }
@@ -559,7 +560,7 @@ fn build_const_struct(ccx: &mut CrateContext, st: &Struct, vals: &[ValueRef])
             offset = target_offset;
         }
         let val = if is_undef(vals[i]) {
-            let wrapped = C_struct([vals[i]]);
+            let wrapped = C_struct([vals[i]], false);
             assert!(!is_undef(wrapped));
             wrapped
         } else {

src/librustc/middle/trans/base.rs

@@ -2936,7 +2936,7 @@ pub fn create_module_map(ccx: &mut CrateContext) -> (ValueRef, uint, uint) {
             let elt = C_struct([
                 C_estr_slice(ccx, *key),
                 v_ptr
-            ]);
+            ], false);
             elts.push(elt);
     }
     unsafe {
@@ -3012,13 +3012,13 @@ pub fn fill_crate_map(ccx: &mut CrateContext, map: ValueRef) {
                 p2i(ccx, mod_map),
                 // byte size of the module map array, an entry consists of two integers
                 C_int(ccx, ((mod_count * mod_struct_size) as int))
-             ]),
+             ], false),
              C_struct([
                 p2i(ccx, vec_elements),
                 // byte size of the subcrates array, an entry consists of an integer
                 C_int(ccx, (subcrates.len() * llsize_of_alloc(ccx, ccx.int_type)) as int)
-             ])
-        ]));
+             ], false)
+        ], false));
     }
 }
 
@@ -3052,7 +3052,7 @@ pub fn write_metadata(cx: &CrateContext, crate: &ast::Crate) {
 
     let encode_parms = crate_ctxt_to_encode_parms(cx, encode_inlined_item);
     let llmeta = C_bytes(encoder::encode_metadata(encode_parms, crate));
-    let llconst = C_struct([llmeta]);
+    let llconst = C_struct([llmeta], false);
     let mut llglobal = do "rust_metadata".with_c_str |buf| {
         unsafe {
             llvm::LLVMAddGlobal(cx.llmod, val_ty(llconst).to_ref(), buf)

src/librustc/middle/trans/common.rs

@@ -848,7 +848,7 @@ pub fn C_floating(s: &str, t: Type) -> ValueRef {
 }
 
 pub fn C_nil() -> ValueRef {
-    return C_struct([]);
+    C_struct([], false)
 }
 
 pub fn C_bool(val: bool) -> ValueRef {
@@ -913,7 +913,7 @@ pub fn C_estr_slice(cx: &mut CrateContext, s: @str) -> ValueRef {
     unsafe {
         let len = s.len();
         let cs = llvm::LLVMConstPointerCast(C_cstr(cx, s), Type::i8p().to_ref());
-        C_struct([cs, C_uint(cx, len)])
+        C_struct([cs, C_uint(cx, len)], false)
     }
 }
 
@@ -927,18 +927,10 @@ pub fn C_zero_byte_arr(size: uint) -> ValueRef {
     }
 }
 
-pub fn C_struct(elts: &[ValueRef]) -> ValueRef {
+pub fn C_struct(elts: &[ValueRef], packed: bool) -> ValueRef {
     unsafe {
         do elts.as_imm_buf |ptr, len| {
-            llvm::LLVMConstStructInContext(base::task_llcx(), ptr, len as c_uint, False)
-        }
-    }
-}
-
-pub fn C_packed_struct(elts: &[ValueRef]) -> ValueRef {
-    unsafe {
-        do elts.as_imm_buf |ptr, len| {
-            llvm::LLVMConstStructInContext(base::task_llcx(), ptr, len as c_uint, True)
+            llvm::LLVMConstStructInContext(base::task_llcx(), ptr, len as c_uint, packed as Bool)
         }
     }
 }

src/librustc/middle/trans/consts.rs

@@ -94,7 +94,7 @@ pub fn const_vec(cx: @mut CrateContext, e: &ast::Expr, es: &[@ast::Expr])
         let (vs, inlineable) = vec::unzip(es.iter().map(|e| const_expr(cx, *e)));
         // If the vector contains enums, an LLVM array won't work.
         let v = if vs.iter().any(|vi| val_ty(*vi) != llunitty) {
-            C_struct(vs)
+            C_struct(vs, false)
         } else {
             C_array(llunitty, vs)
         };
@@ -186,7 +186,7 @@ pub fn const_expr(cx: @mut CrateContext, e: &ast::Expr) -> (ValueRef, bool) {
     match adjustment {
         None => { }
         Some(@ty::AutoAddEnv(ty::re_static, ast::BorrowedSigil)) => {
-            llconst = C_struct([llconst, C_null(Type::opaque_box(cx).ptr_to())])
+            llconst = C_struct([llconst, C_null(Type::opaque_box(cx).ptr_to())], false)
         }
         Some(@ty::AutoAddEnv(ref r, ref s)) => {
             cx.sess.span_bug(e.span, format!("unexpected static function: \
@@ -227,7 +227,7 @@ pub fn const_expr(cx: @mut CrateContext, e: &ast::Expr) -> (ValueRef, bool) {
                             match ty::get(ty).sty {
                                 ty::ty_evec(_, ty::vstore_fixed(*)) => {
                                     let size = machine::llsize_of(cx, val_ty(llconst));
-                                    llconst = C_struct([llptr, size]);
+                                    llconst = C_struct([llptr, size], false);
                                 }
                                 _ => {}
                             }
@@ -559,7 +559,7 @@ fn const_expr_unadjusted(cx: @mut CrateContext,
                 llvm::LLVMSetGlobalConstant(gv, True);
                 SetLinkage(gv, PrivateLinkage);
                 let p = const_ptrcast(cx, gv, llunitty);
-                (C_struct([p, sz]), false)
+                (C_struct([p, sz], false), false)
               }
               _ => cx.sess.span_bug(e.span, "bad const-slice expr")
             }
@@ -575,7 +575,7 @@ fn const_expr_unadjusted(cx: @mut CrateContext,
             };
             let vs = vec::from_elem(n, const_expr(cx, elem).first());
             let v = if vs.iter().any(|vi| val_ty(*vi) != llunitty) {
-                C_struct(vs)
+                C_struct(vs, false)
             } else {
                 C_array(llunitty, vs)
             };

src/librustc/middle/trans/meth.rs

@@ -576,7 +576,7 @@ pub fn make_vtable(ccx: &mut CrateContext,
             components.push(ptr)
         }
 
-        let tbl = C_struct(components);
+        let tbl = C_struct(components, false);
         let sym = token::gensym("vtable");
         let vt_gvar = do format!("vtable{}", sym).with_c_str |buf| {
             llvm::LLVMAddGlobal(ccx.llmod, val_ty(tbl).to_ref(), buf)

src/test/run-pass/packed-struct-size.rs

@@ -50,6 +50,11 @@ struct S7_Option {
     d: Option<@mut f64>
 }
 
+// Placing packed structs in statics should work
+static TEST_S4: S4 = S4 { a: 1, b: [2, 3, 4] };
+static TEST_S5: S5 = S5 { a: 3, b: 67 };
+static TEST_S3_Foo: S3_Foo = S3_Foo { a: 1, b: 2, c: Baz };
+
 
 pub fn main() {
     assert_eq!(sys::size_of::<S4>(), 4);