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riscv64: use common implementation of genTypedValue

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This commit is contained in:
Jakub Konka 2023-03-03 18:53:13 +01:00
parent 0d2c25ca9d
commit 5b3ea49806
1 changed files with 20 additions and 138 deletions
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158
src/arch/riscv64/CodeGen.zig
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@ -23,6 +23,7 @@ const log = std.log.scoped(.codegen);
const build_options = @import("build_options");
const codegen = @import("../../codegen.zig");
const CodeGenError = codegen.CodeGenError;
const Result = codegen.Result;
const DebugInfoOutput = codegen.DebugInfoOutput;
@ -35,7 +36,7 @@ const Instruction = abi.Instruction;
const callee_preserved_regs = abi.callee_preserved_regs;
const gp = abi.RegisterClass.gp;
const InnerError = codegen.CodeGenError || error{OutOfRegisters};
const InnerError = CodeGenError || error{OutOfRegisters};
gpa: Allocator,
air: Air,
@ -221,7 +222,7 @@ pub fn generate(
liveness: Liveness,
code: *std.ArrayList(u8),
debug_output: DebugInfoOutput,
) codegen.CodeGenError!Result {
) CodeGenError!Result {
if (build_options.skip_non_native and builtin.cpu.arch != bin_file.options.target.cpu.arch) {
@panic("Attempted to compile for architecture that was disabled by build configuration");
}
@ -2548,145 +2549,26 @@ fn getResolvedInstValue(self: *Self, inst: Air.Inst.Index) MCValue {
}
}
fn lowerDeclRef(self: *Self, tv: TypedValue, decl_index: Module.Decl.Index) InnerError!MCValue {
const ptr_bits = self.target.cpu.arch.ptrBitWidth();
const ptr_bytes: u64 = @divExact(ptr_bits, 8);
const mod = self.bin_file.options.module.?;
const decl = mod.declPtr(decl_index);
mod.markDeclAlive(decl);
if (self.bin_file.cast(link.File.Elf)) |elf_file| {
const atom_index = try elf_file.getOrCreateAtomForDecl(decl_index);
const atom = elf_file.getAtom(atom_index);
return MCValue{ .memory = atom.getOffsetTableAddress(elf_file) };
} else if (self.bin_file.cast(link.File.MachO)) |_| {
unreachable;
} else if (self.bin_file.cast(link.File.Coff)) |_| {
return self.fail("TODO codegen COFF const Decl pointer", .{});
} else if (self.bin_file.cast(link.File.Plan9)) |p9| {
const decl_block_index = try p9.seeDecl(decl_index);
const decl_block = p9.getDeclBlock(decl_block_index);
const got_addr = p9.bases.data + decl_block.got_index.? * ptr_bytes;
return MCValue{ .memory = got_addr };
} else {
return self.fail("TODO codegen non-ELF const Decl pointer", .{});
}
_ = tv;
}
fn genTypedValue(self: *Self, typed_value: TypedValue) InnerError!MCValue {
if (typed_value.val.isUndef())
return MCValue{ .undef = {} };
if (typed_value.val.castTag(.decl_ref)) |payload| {
return self.lowerDeclRef(typed_value, payload.data);
}
if (typed_value.val.castTag(.decl_ref_mut)) |payload| {
return self.lowerDeclRef(typed_value, payload.data.decl_index);
}
const target = self.target.*;
const ptr_bits = self.target.cpu.arch.ptrBitWidth();
switch (typed_value.ty.zigTypeTag()) {
.Pointer => switch (typed_value.ty.ptrSize()) {
.Slice => {
var buf: Type.SlicePtrFieldTypeBuffer = undefined;
const ptr_type = typed_value.ty.slicePtrFieldType(&buf);
const ptr_mcv = try self.genTypedValue(.{ .ty = ptr_type, .val = typed_value.val });
const mod = self.bin_file.options.module.?;
const slice_len = typed_value.val.sliceLen(mod);
// Codegen can't handle some kinds of indirection. If the wrong union field is accessed here it may mean
// the Sema code needs to use anonymous Decls or alloca instructions to store data.
const ptr_imm = ptr_mcv.memory;
_ = slice_len;
_ = ptr_imm;
// We need more general support for const data being stored in memory to make this work.
return self.fail("TODO codegen for const slices", .{});
},
else => {
if (typed_value.val.tag() == .int_u64) {
return MCValue{ .immediate = typed_value.val.toUnsignedInt(target) };
}
return self.fail("TODO codegen more kinds of const pointers", .{});
},
const mcv: MCValue = switch (try codegen.genTypedValue(
self.bin_file,
self.src_loc,
typed_value,
self.mod_fn.owner_decl,
)) {
.mcv => |mcv| switch (mcv) {
.none => .none,
.undef => .undef,
.linker_load => unreachable, // TODO
.immediate => |imm| .{ .immediate = imm },
.memory => |addr| .{ .memory = addr },
},
.Int => {
const info = typed_value.ty.intInfo(self.target.*);
if (info.bits > ptr_bits or info.signedness == .signed) {
return self.fail("TODO const int bigger than ptr and signed int", .{});
}
return MCValue{ .immediate = typed_value.val.toUnsignedInt(target) };
.fail => |msg| {
self.err_msg = msg;
return error.CodegenFail;
},
.Bool => {
return MCValue{ .immediate = @boolToInt(typed_value.val.toBool()) };
},
.ComptimeInt => unreachable, // semantic analysis prevents this
.ComptimeFloat => unreachable, // semantic analysis prevents this
.Optional => {
if (typed_value.ty.isPtrLikeOptional()) {
if (typed_value.val.isNull())
return MCValue{ .immediate = 0 };
var buf: Type.Payload.ElemType = undefined;
return self.genTypedValue(.{
.ty = typed_value.ty.optionalChild(&buf),
.val = typed_value.val,
});
} else if (typed_value.ty.abiSize(self.target.*) == 1) {
return MCValue{ .immediate = @boolToInt(typed_value.val.isNull()) };
}
return self.fail("TODO non pointer optionals", .{});
},
.Enum => {
if (typed_value.val.castTag(.enum_field_index)) |field_index| {
switch (typed_value.ty.tag()) {
.enum_simple => {
return MCValue{ .immediate = field_index.data };
},
.enum_full, .enum_nonexhaustive => {
const enum_full = typed_value.ty.cast(Type.Payload.EnumFull).?.data;
if (enum_full.values.count() != 0) {
const tag_val = enum_full.values.keys()[field_index.data];
return self.genTypedValue(.{ .ty = enum_full.tag_ty, .val = tag_val });
} else {
return MCValue{ .immediate = field_index.data };
}
},
else => unreachable,
}
} else {
var int_tag_buffer: Type.Payload.Bits = undefined;
const int_tag_ty = typed_value.ty.intTagType(&int_tag_buffer);
return self.genTypedValue(.{ .ty = int_tag_ty, .val = typed_value.val });
}
},
.ErrorSet => {
switch (typed_value.val.tag()) {
.@"error" => {
const err_name = typed_value.val.castTag(.@"error").?.data.name;
const module = self.bin_file.options.module.?;
const global_error_set = module.global_error_set;
const error_index = global_error_set.get(err_name).?;
return MCValue{ .immediate = error_index };
},
else => {
// In this case we are rendering an error union which has a 0 bits payload.
return MCValue{ .immediate = 0 };
},
}
},
.ErrorUnion => {
const error_type = typed_value.ty.errorUnionSet();
const payload_type = typed_value.ty.errorUnionPayload();
const sub_val = typed_value.val.castTag(.eu_payload).?.data;
if (!payload_type.hasRuntimeBits()) {
// We use the error type directly as the type.
return self.genTypedValue(.{ .ty = error_type, .val = sub_val });
}
return self.fail("TODO implement error union const of type '{}'", .{typed_value.ty.fmtDebug()});
},
else => return self.fail("TODO implement const of type '{}'", .{typed_value.ty.fmtDebug()}),
}
};
return mcv;
}
const CallMCValues = struct {