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port 69e3b4e to self-hosted compiler

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See #1249
This commit is contained in:
Andrew Kelley 2018-07-17 10:42:44 -04:00
parent 3cbf59b4c1
commit 1a7cf4cbce
1 changed files with 15 additions and 2 deletions
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17
src-self-hosted/ir.zig
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@ -53,6 +53,7 @@ pub const Instruction = struct {
val: IrVal,
ref_count: usize,
span: Span,
owner_bb: *BasicBlock,
/// true if this instruction was generated by zig and not from user code
is_generated: bool,
@ -132,6 +133,13 @@ pub const Instruction = struct {
}
}
fn ref(base: *Instruction, builder: *Builder) void {
base.ref_count += 1;
if (base.owner_bb != builder.current_basic_block and !base.isCompTime()) {
base.owner_bb.ref();
}
}
fn getAsParam(param: *Instruction) !*Instruction {
const child = param.child orelse return error.SemanticAnalysisFailed;
switch (child.val) {
@ -161,6 +169,10 @@ pub const Instruction = struct {
}
}
pub fn isCompTime(base: *const Instruction) bool {
return base.val == IrVal.KnownValue;
}
pub fn linkToParent(self: *Instruction, parent: *Instruction) void {
assert(self.parent == null);
assert(parent.child == null);
@ -816,6 +828,7 @@ pub const Builder = struct {
.child = null,
.parent = null,
.llvm_value = undefined,
.owner_bb = self.current_basic_block,
},
.params = params,
});
@ -825,8 +838,8 @@ pub const Builder = struct {
inline while (i < @memberCount(I.Params)) : (i += 1) {
const FieldType = comptime @typeOf(@field(I.Params(undefined), @memberName(I.Params, i)));
switch (FieldType) {
*Instruction => @field(inst.params, @memberName(I.Params, i)).ref_count += 1,
?*Instruction => if (@field(inst.params, @memberName(I.Params, i))) |other| other.ref_count += 1,
*Instruction => @field(inst.params, @memberName(I.Params, i)).ref(self),
?*Instruction => if (@field(inst.params, @memberName(I.Params, i))) |other| other.ref(self),
else => {},
}
}