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x86_64: simplify genUnOpMir() when modifying value in memory

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This commit is contained in:
Jakub Konka 2023-04-11 23:07:49 +02:00
parent dbdf8086bd
commit 38d46a6764
1 changed files with 19 additions and 1 deletions
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20
src/arch/x86_64/CodeGen.zig
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@ -4228,7 +4228,25 @@ fn genUnOpMir(self: *Self, mir_tag: Mir.Inst.Tag, dst_ty: Type, dst_mcv: MCValue
const addr_reg_lock = self.register_manager.lockRegAssumeUnused(addr_reg); const addr_reg_lock = self.register_manager.lockRegAssumeUnused(addr_reg);
defer self.register_manager.unlockReg(addr_reg_lock); defer self.register_manager.unlockReg(addr_reg_lock);
try self.loadMemPtrIntoRegister(addr_reg, Type.usize, dst_mcv); switch (dst_mcv) {
.memory => |addr| try self.genSetReg(Type.usize, addr_reg, .{ .immediate = addr }),
.linker_load => |load_struct| {
const atom_index = if (self.bin_file.cast(link.File.MachO)) |macho_file| blk: {
const atom = try macho_file.getOrCreateAtomForDecl(self.mod_fn.owner_decl);
break :blk macho_file.getAtom(atom).getSymbolIndex().?;
} else if (self.bin_file.cast(link.File.Coff)) |coff_file| blk: {
const atom = try coff_file.getOrCreateAtomForDecl(self.mod_fn.owner_decl);
break :blk coff_file.getAtom(atom).getSymbolIndex().?;
} else unreachable;
switch (load_struct.type) {
.import => unreachable,
.got => try self.asmMovLinker(addr_reg, atom_index, load_struct),
.direct => try self.asmLeaLinker(addr_reg, atom_index, load_struct),
}
},
else => unreachable,
}
try self.asmMemory( try self.asmMemory(
mir_tag, mir_tag,
Memory.sib(Memory.PtrSize.fromSize(abi_size), .{ .base = addr_reg }), Memory.sib(Memory.PtrSize.fromSize(abi_size), .{ .base = addr_reg }),