Continue transition to an ivec-only main
Only generate a single main function. Rename rust_start_ivec to rust_start, leaving a transitional rust_start_ivec in place.
This commit is contained in:
Brian Anderson
parent
53eb4a3025
commit
c2d8a4df35
3 changed files with 41 additions and 123 deletions
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@ -6385,84 +6385,20 @@ fn create_main_wrapper(ccx: &@crate_ctxt, sp: &span,
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ccx.sess.span_fatal(sp, "multiple 'main' functions");
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}
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tag main_mode {
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mm_nil;
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mm_vec;
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mm_ivec;
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};
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let main_mode = alt ty::struct(ccx.tcx, main_node_type) {
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let main_takes_ivec = alt ty::struct(ccx.tcx, main_node_type) {
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ty::ty_fn(_, args, _ ,_ ,_) {
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if std::vec::len(args) == 0u {
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mm_nil
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} else {
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alt ty::struct(ccx.tcx, args.(0).ty) {
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ty::ty_ivec(_) { mm_ivec }
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ty::ty_vec(_) { mm_vec }
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}
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}
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std::vec::len(args) != 0u
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}
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};
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// Have to create two different main functions depending on whether
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// main was declared to take vec or ivec
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let llfn_vec = create_main_wrapper_vec(ccx, sp, main_llfn, main_mode);
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let llfn_ivec = create_main_wrapper_ivec(ccx, sp, main_llfn, main_mode);
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let takes_ivec = main_mode == mm_ivec;
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// Create a global to tell main.ll which main we want to use
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create_main_type_indicator(ccx, takes_ivec);
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ccx.main_fn = takes_ivec ? some(llfn_ivec) : some(llfn_vec);
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let llfn = create_main(ccx, sp, main_llfn, main_takes_ivec);
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create_main_type_indicator(ccx, main_takes_ivec);
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ccx.main_fn = some(llfn);
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fn create_main_wrapper_vec(ccx: &@crate_ctxt,
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fn create_main(ccx: &@crate_ctxt,
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sp: &span,
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main_llfn: ValueRef,
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main_mode: main_mode) -> ValueRef {
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let vecarg = {
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mode: ty::mo_val,
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ty: ty::mk_vec(ccx.tcx, {
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ty: ty::mk_str(ccx.tcx),
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mut: ast::imm
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})
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};
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let llfty = type_of_fn(ccx, sp,
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ast::proto_fn,
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~[vecarg],
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ty::mk_nil(ccx.tcx),
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0u);
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let llfdecl = decl_fastcall_fn(ccx.llmod, "_rust_main", llfty);
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let fcx = new_fn_ctxt(new_local_ctxt(ccx), sp, llfdecl);
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let bcx = new_top_block_ctxt(fcx);
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if main_mode != mm_ivec {
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let lloutputarg = llvm::LLVMGetParam(llfdecl, 0u);
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let lltaskarg = llvm::LLVMGetParam(llfdecl, 1u);
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let llenvarg = llvm::LLVMGetParam(llfdecl, 2u);
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let llargvarg = llvm::LLVMGetParam(llfdecl, 3u);
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let args = alt main_mode {
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mm_nil. { ~[lloutputarg,
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lltaskarg,
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llenvarg] }
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mm_vec. { ~[lloutputarg,
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lltaskarg,
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llenvarg,
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llargvarg] }
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};
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bcx.build.FastCall(main_llfn, args);
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}
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build_return(bcx);
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let lltop = bcx.llbb;
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finish_fn(fcx, lltop);
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ret llfdecl;
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}
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fn create_main_wrapper_ivec(ccx: &@crate_ctxt,
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sp: &span,
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main_llfn: ValueRef,
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main_mode: main_mode) -> ValueRef {
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takes_ivec: bool) -> ValueRef {
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let ivecarg = {
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mode: ty::mo_val,
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ty: ty::mk_ivec(ccx.tcx, {
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@ -6475,12 +6411,12 @@ fn create_main_wrapper(ccx: &@crate_ctxt, sp: &span,
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~[ivecarg],
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ty::mk_nil(ccx.tcx),
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0u);
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let llfdecl = decl_fastcall_fn(ccx.llmod, "_rust_main_ivec", llfty);
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let llfdecl = decl_fastcall_fn(ccx.llmod, "_rust_main", llfty);
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let fcx = new_fn_ctxt(new_local_ctxt(ccx), sp, llfdecl);
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let bcx = new_top_block_ctxt(fcx);
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if main_mode == mm_ivec {
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if takes_ivec {
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let lloutputarg = llvm::LLVMGetParam(llfdecl, 0u);
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let lltaskarg = llvm::LLVMGetParam(llfdecl, 1u);
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let llenvarg = llvm::LLVMGetParam(llfdecl, 2u);
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@ -6490,6 +6426,14 @@ fn create_main_wrapper(ccx: &@crate_ctxt, sp: &span,
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llenvarg,
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llargvarg];
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bcx.build.FastCall(main_llfn, args);
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} else {
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let lloutputarg = llvm::LLVMGetParam(llfdecl, 0u);
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let lltaskarg = llvm::LLVMGetParam(llfdecl, 1u);
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let llenvarg = llvm::LLVMGetParam(llfdecl, 2u);
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let args = ~[lloutputarg,
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lltaskarg,
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llenvarg];
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bcx.build.FastCall(main_llfn, args);
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}
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build_return(bcx);
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@ -17,37 +17,20 @@
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; FIXME: Remove after main takes only ivec
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@_rust_main_is_ivec = external global i32
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declare i32 @rust_start(i32, i32, i32, i32)
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declare i32 @rust_start(i32, i32, i32, i32, i32)
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declare external fastcc void @_rust_main(i1* nocapture, %task*, %2* nocapture, %5*);
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declare external fastcc void @_rust_main(i1* nocapture, %task*, %2* nocapture, %ivec)
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define void @_rust_main_wrap(i1* nocapture, %task *, %2* nocapture, %5 *)
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{
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tail call fastcc void @_rust_main(i1* %0, %task *%1, %2* nocapture %2, %5 *%3)
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ret void
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}
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declare i32 @rust_start_ivec(i32, i32, i32, i32, i32)
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declare external fastcc void @_rust_main_ivec(i1* nocapture, %task*, %2* nocapture, %ivec)
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define void @_rust_main_wrap_ivec(i1* nocapture, %task *, %2* nocapture, %ivec *)
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define void @_rust_main_wrap(i1* nocapture, %task *, %2* nocapture, %ivec *)
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{
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%ivec = load %ivec *%3
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tail call fastcc void @_rust_main_ivec(i1* %0, %task *%1, %2* nocapture %2, %ivec %ivec)
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tail call fastcc void @_rust_main(i1* %0, %task *%1, %2* nocapture %2, %ivec %ivec)
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ret void
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}
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define i32 @"MAIN"(i32, i32) {
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%is_ivec = load i32 *@_rust_main_is_ivec
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%is_ivec1 = trunc i32 %is_ivec to i1
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br i1 %is_ivec1, label %ivec, label %evec
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evec:
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%3 = tail call i32 @rust_start(i32 ptrtoint (void (i1*, %task*, %2*, %5*)* @_rust_main_wrap to i32), i32 %0, i32 %1, i32 ptrtoint (%0* @_rust_crate_map_toplevel to i32))
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%3 = tail call i32 @rust_start(i32 ptrtoint (void (i1*, %task*, %2*, %ivec*)* @_rust_main_wrap to i32), i32 %0, i32 %1, i32 ptrtoint (%0* @_rust_crate_map_toplevel to i32), i32 %is_ivec)
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ret i32 %3
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ivec:
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%4 = tail call i32 @rust_start_ivec(i32 ptrtoint (void (i1*, %task*, %2*, %ivec*)* @_rust_main_wrap_ivec to i32), i32 %0, i32 %1, i32 ptrtoint (%0* @_rust_crate_map_toplevel to i32), i32 %is_ivec)
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ret i32 %4
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}
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@ -59,7 +59,6 @@ command_line_args : public kernel_owned<command_line_args>
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// array here to ensure it survives to program-shutdown.
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args->ref();
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if (main_is_ivec) {
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size_t ivec_interior_sz =
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sizeof(size_t) * 2 + sizeof(rust_str *) * 4;
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args_ivec = (rust_ivec *)
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@ -68,6 +67,7 @@ command_line_args : public kernel_owned<command_line_args>
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args_ivec->fill = 0;
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size_t ivec_exterior_sz = sizeof(rust_str *) * argc;
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args_ivec->alloc = ivec_exterior_sz;
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if (main_is_ivec) {
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// NB: This is freed by some ivec machinery, probably the drop
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// glue in main, so we don't free it ourselves
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args_ivec->payload.ptr = (rust_ivec_heap *)
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@ -75,15 +75,11 @@ command_line_args : public kernel_owned<command_line_args>
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"command line arg exterior");
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args_ivec->payload.ptr->fill = ivec_exterior_sz;
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memcpy(&args_ivec->payload.ptr->data, strs, ivec_exterior_sz);
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} else {
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args_ivec = NULL;
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}
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}
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~command_line_args() {
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if (args_ivec) {
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kernel->free(args_ivec);
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}
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if (args) {
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// Drop the args we've had pinned here.
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rust_str **strs = (rust_str**) &args->data[0];
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@ -110,8 +106,8 @@ command_line_args : public kernel_owned<command_line_args>
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int check_claims = 0;
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extern "C" CDECL int
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rust_start_ivec(uintptr_t main_fn, int argc, char **argv,
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void* crate_map, int main_is_ivec) {
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rust_start(uintptr_t main_fn, int argc, char **argv,
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void* crate_map, int main_takes_ivec) {
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rust_env *env = load_env();
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@ -126,7 +122,7 @@ rust_start_ivec(uintptr_t main_fn, int argc, char **argv,
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rust_scheduler *sched = root_task->sched;
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command_line_args *args
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= new (kernel, "main command line args")
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command_line_args(root_task, argc, argv, main_is_ivec);
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command_line_args(root_task, argc, argv, main_takes_ivec);
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DLOG(sched, dom, "startup: %d args in 0x%" PRIxPTR,
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args->argc, (uintptr_t)args->args);
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@ -134,13 +130,7 @@ rust_start_ivec(uintptr_t main_fn, int argc, char **argv,
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DLOG(sched, dom, "startup: arg[%d] = '%s'", i, args->argv[i]);
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}
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if (main_is_ivec) {
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DLOG(sched, dom, "main takes ivec");
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root_task->start(main_fn, (uintptr_t)args->args_ivec);
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} else {
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DLOG(sched, dom, "main takes vec");
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root_task->start(main_fn, (uintptr_t)args->args);
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}
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root_task->deref();
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root_task = NULL;
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@ -160,10 +150,11 @@ rust_start_ivec(uintptr_t main_fn, int argc, char **argv,
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return ret;
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}
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// FIXME: Transitional. Please remove.
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extern "C" CDECL int
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rust_start(uintptr_t main_fn, int argc, char **argv,
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void* crate_map) {
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return rust_start_ivec(main_fn, argc, argv, crate_map, 0);
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rust_start_ivec(uintptr_t main_fn, int argc, char **argv,
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void* crate_map, int main_takes_ivec) {
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return rust_start(main_fn, argc, argv, crate_map, main_takes_ivec);
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}
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