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rustc: Add a generic struct_elt() function to trans

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This commit is contained in:
Patrick Walton 2011-06-10 13:49:22 -07:00
parent 451fc176d3
commit f1431adb40
1 changed files with 10 additions and 4 deletions
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14
src/comp/middle/trans.rs
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@ -347,6 +347,15 @@ fn val_str(type_names tn, ValueRef v) -> str {
ret ty_str(tn, val_ty(v));
}
// Returns the nth element of the given LLVM structure type.
fn struct_elt(TypeRef llstructty, uint n) -> TypeRef {
auto elt_count = llvm::LLVMCountStructElementTypes(llstructty);
assert (n < elt_count);
auto elt_tys = vec::init_elt(T_nil(), elt_count);
llvm::LLVMGetStructElementTypes(llstructty, vec::buf(elt_tys));
ret llvm::LLVMGetElementType(elt_tys.(n));
}
// LLVM type constructors.
@ -7686,10 +7695,7 @@ fn trans_mod(@local_ctxt cx, &ast::_mod m) {
fn get_pair_fn_ty(TypeRef llpairty) -> TypeRef {
// Bit of a kludge: pick the fn typeref out of the pair.
let vec[TypeRef] pair_tys = [T_nil(), T_nil()];
llvm::LLVMGetStructElementTypes(llpairty,
vec::buf[TypeRef](pair_tys));
ret llvm::LLVMGetElementType(pair_tys.(0));
ret struct_elt(llpairty, 0u);
}
fn decl_fn_and_pair(&@crate_ctxt ccx, &span sp,