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stage2 codegen: Remove hacks for discontinued SPU II backend

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joachimschmidt557 2021-06-09 14:03:14 +08:00 committed by Veikka Tuominen
parent f62f35e346
commit 96c60bcca5
1 changed files with 8 additions and 26 deletions
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34
src/codegen.zig
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@ -781,12 +781,8 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
branch.inst_table.putAssumeCapacity(inst, .dead);
switch (prev_value) {
.register => |reg| {
// TODO separate architectures with registers from
// stack-based architectures (spu_2)
if (callee_preserved_regs.len > 0) {
const canon_reg = toCanonicalReg(reg);
self.register_manager.freeReg(canon_reg);
}
const canon_reg = toCanonicalReg(reg);
self.register_manager.freeReg(canon_reg);
},
else => {}, // TODO process stack allocation death
}
@ -926,12 +922,8 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
const ptr_bits = arch.ptrBitWidth();
const ptr_bytes: u64 = @divExact(ptr_bits, 8);
if (abi_size <= ptr_bytes) {
// TODO separate architectures with registers from
// stack-based architectures (spu_2)
if (callee_preserved_regs.len > 0) {
if (self.register_manager.tryAllocReg(inst, &.{})) |reg| {
return MCValue{ .register = registerAlias(reg, abi_size) };
}
if (self.register_manager.tryAllocReg(inst, &.{})) |reg| {
return MCValue{ .register = registerAlias(reg, abi_size) };
}
}
}
@ -1249,16 +1241,12 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
.register => |reg| {
// If it's in the registers table, need to associate the register with the
// new instruction.
// TODO separate architectures with registers from
// stack-based architectures (spu_2)
if (callee_preserved_regs.len > 0) {
if (reg.allocIndex()) |index| {
if (!self.register_manager.isRegFree(reg)) {
self.register_manager.registers[index] = inst;
}
if (reg.allocIndex()) |index| {
if (!self.register_manager.isRegFree(reg)) {
self.register_manager.registers[index] = inst;
}
log.debug("reusing {} => {*}", .{ reg, inst });
}
log.debug("reusing {} => {*}", .{ reg, inst });
},
.stack_offset => |off| {
log.debug("reusing stack offset {} => {*}", .{ off, inst });
@ -2182,12 +2170,6 @@ fn Function(comptime arch: std.Target.Cpu.Arch) type {
const arg_index = self.arg_index;
self.arg_index += 1;
// TODO separate architectures with registers from
// stack-based architectures (spu_2)
if (callee_preserved_regs.len == 0) {
return self.fail(inst.base.src, "TODO implement Register enum for {}", .{self.target.cpu.arch});
}
const result = self.args[arg_index];
const mcv = switch (arch) {
// TODO support stack-only arguments on all target architectures