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x86_64: implement store to immediate address

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This commit is contained in:
Jacob Young 2023-04-02 22:25:35 -04:00 committed by Jakub Konka
parent 272acb7ee5
commit 1980f5479b
2 changed files with 12 additions and 21 deletions
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32
src/arch/x86_64/CodeGen.zig
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@ -3651,10 +3651,7 @@ fn store(self: *Self, ptr: MCValue, value: MCValue, ptr_ty: Type, value_ty: Type
.dead => unreachable,
.eflags => unreachable,
.register_overflow => unreachable,
.immediate => |imm| {
try self.setRegOrMem(value_ty, .{ .memory = imm }, value);
},
.stack_offset => {
.immediate, .stack_offset => {
const reg = try self.copyToTmpRegister(ptr_ty, ptr);
try self.store(.{ .register = reg }, value, ptr_ty, value_ty);
},
@ -3748,23 +3745,18 @@ fn store(self: *Self, ptr: MCValue, value: MCValue, ptr_ty: Type, value_ty: Type
-@intCast(i32, overflow_bit_offset),
);
},
.linker_load,
.memory,
.stack_offset,
=> {
if (abi_size <= 8) {
const tmp_reg = try self.copyToTmpRegister(value_ty, value);
return self.store(ptr, .{ .register = tmp_reg }, ptr_ty, value_ty);
}
try self.genInlineMemcpy(.{ .stack_offset = 0 }, value, .{ .immediate = abi_size }, .{
.source_stack_base = .rbp,
.dest_stack_base = reg.to64(),
});
},
.linker_load, .memory, .stack_offset => if (abi_size <= 8) {
const tmp_reg = try self.copyToTmpRegister(value_ty, value);
try self.store(ptr, .{ .register = tmp_reg }, ptr_ty, value_ty);
} else try self.genInlineMemcpy(
.{ .stack_offset = 0 },
value,
.{ .immediate = abi_size },
.{ .source_stack_base = .rbp, .dest_stack_base = reg.to64() },
),
.ptr_stack_offset => {
const tmp_reg = try self.copyToTmpRegister(value_ty, value);
return self.store(ptr, .{ .register = tmp_reg }, ptr_ty, value_ty);
try self.store(ptr, .{ .register = tmp_reg }, ptr_ty, value_ty);
},
}
},
@ -3788,7 +3780,7 @@ fn store(self: *Self, ptr: MCValue, value: MCValue, ptr_ty: Type, value_ty: Type
);
const new_ptr = MCValue{ .register = addr_reg.to64() };
return self.store(new_ptr, value, ptr_ty, value_ty);
try self.store(new_ptr, value, ptr_ty, value_ty);
},
}
}

1
test/behavior/inttoptr.zig
View File

@ -11,7 +11,6 @@ fn addressToFunction() void {
}
test "mutate through ptr initialized with constant intToPtr value" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest;
if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO