authorgravatar for david@vortan.devDavid Rubin <david@vortan.dev> 2024-11-28 17:51:51-08:00
committergravatar for david@vortan.devDavid Rubin <david@vortan.dev> 2024-11-28 18:05:36-08:00
log1d78d4f8c159f5997f6dcbb2d4104923c7c656a6
tree3500f62cb06bacb1a391d769d52502f97354af0c
parentbc3094b278ebdce5f7f86224081a228495bc0dd6
signaturelock-open Commit is signed but in an unrecognized format.

sema: hotpath `++` and `**` for array-pointers


1 files changed, 70 insertions(+), 0 deletions(-)

src/Sema.zig+70
...@@ -15237,6 +15237,76 @@ fn zirArrayCat(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Ai...@@ -15237,6 +15237,76 @@ fn zirArrayCat(sema: *Sema, block: *Block, inst: Zir.Inst.Index) CompileError!Ai
15237 .flags = .{ .address_space = ptr_as },15237 .flags = .{ .address_space = ptr_as },
15238 });15238 });
1523915239
15240 // if both the source and destination are arrays
15241 // we can hot path via a memcpy.
15242 if (lhs_ty.zigTypeTag(zcu) == .pointer and
15243 rhs_ty.zigTypeTag(zcu) == .pointer)
15244 {
15245 const slice_ty = try pt.ptrTypeSema(.{
15246 .child = resolved_elem_ty.toIntern(),
15247 .flags = .{
15248 .size = .Slice,
15249 .address_space = ptr_as,
15250 },
15251 });
15252 const many_ty = try pt.ptrTypeSema(.{
15253 .child = resolved_elem_ty.toIntern(),
15254 .flags = .{
15255 .size = .Many,
15256 .address_space = ptr_as,
15257 },
15258 });
15259 const slice_ty_ref = Air.internedToRef(slice_ty.toIntern());
15260
15261 // lhs_dest_slice = dest[0..lhs.len]
15262 const lhs_len_ref = try pt.intRef(Type.usize, lhs_len);
15263 const lhs_dest_slice = try block.addInst(.{
15264 .tag = .slice,
15265 .data = .{ .ty_pl = .{
15266 .ty = slice_ty_ref,
15267 .payload = try sema.addExtra(Air.Bin{
15268 .lhs = alloc,
15269 .rhs = lhs_len_ref,
15270 }),
15271 } },
15272 });
15273 _ = try block.addBinOp(.memcpy, lhs_dest_slice, lhs);
15274
15275 // rhs_dest_slice = dest[lhs.len..][0..rhs.len]
15276 const rhs_len_ref = try pt.intRef(Type.usize, rhs_len);
15277 const rhs_dest_offset = try block.addInst(.{
15278 .tag = .ptr_add,
15279 .data = .{ .ty_pl = .{
15280 .ty = Air.internedToRef(many_ty.toIntern()),
15281 .payload = try sema.addExtra(Air.Bin{
15282 .lhs = alloc,
15283 .rhs = lhs_len_ref,
15284 }),
15285 } },
15286 });
15287 const rhs_dest_slice = try block.addInst(.{
15288 .tag = .slice,
15289 .data = .{ .ty_pl = .{
15290 .ty = slice_ty_ref,
15291 .payload = try sema.addExtra(Air.Bin{
15292 .lhs = rhs_dest_offset,
15293 .rhs = rhs_len_ref,
15294 }),
15295 } },
15296 });
15297
15298 _ = try block.addBinOp(.memcpy, rhs_dest_slice, rhs);
15299
15300 if (res_sent_val) |sent_val| {
15301 const elem_index = try pt.intRef(Type.usize, result_len);
15302 const elem_ptr = try block.addPtrElemPtr(alloc, elem_index, elem_ptr_ty);
15303 const init = Air.internedToRef((try pt.getCoerced(sent_val, lhs_info.elem_type)).toIntern());
15304 try sema.storePtr2(block, src, elem_ptr, src, init, lhs_src, .store);
15305 }
15306
15307 return alloc;
15308 }
15309
15240 var elem_i: u32 = 0;15310 var elem_i: u32 = 0;
15241 while (elem_i < lhs_len) : (elem_i += 1) {15311 while (elem_i < lhs_len) : (elem_i += 1) {
15242 const elem_index = try pt.intRef(Type.usize, elem_i);15312 const elem_index = try pt.intRef(Type.usize, elem_i);