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ir: parse ptrtoint

master
Andrew Kelley 2020-04-19 00:38:56 -04:00
parent 49e2f3ca36
commit bd37c8d8ed
1 changed files with 23 additions and 3 deletions
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26
src-self-hosted/ir.zig
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@ -150,7 +150,7 @@ pub fn parseRoot(ctx: *ParseContext) !void {
while (ctx.i < ctx.source.len) : (ctx.i += 1) switch (ctx.source[ctx.i]) {
';' => _ = try skipToAndOver(ctx, '\n'),
'@' => {
const at_start = ctx.i;
ctx.i += 1;
const ident = try skipToAndOver(ctx, ' ');
const opt_type = try parseOptionalType(ctx);
const inst = try parseInstruction(ctx, opt_type);
@ -298,7 +298,24 @@ fn parseParameterGeneric(ctx: *ParseContext, comptime T: type) !T {
switch (T) {
Inst.Fn.Body => return parseBody(ctx),
Inst.OtherInst => {
return parseError(ctx, "TODO implement parseParameterGeneric for OtherInst", .{});
const map = switch (ctx.source[ctx.i]) {
'@' => ctx.global_name_map,
'%' => return parseError(ctx, "TODO implement OtherInst for %", .{}),
else => |byte| return parseError(ctx, "unexpected byte: '{c}'", .{byte}),
};
ctx.i += 1;
const name_start = ctx.i;
while (ctx.i < ctx.source.len) : (ctx.i += 1) switch (ctx.source[ctx.i]) {
';', ' ', '\n', ',', ')' => break,
else => continue,
};
const ident = ctx.source[name_start..ctx.i];
const kv = map.get(ident) orelse {
const bad_name = ctx.source[name_start - 1 .. ctx.i];
ctx.i = name_start - 1;
return parseError(ctx, "unrecognized identifier: {}", .{bad_name});
};
return Inst.OtherInst{ .index = kv.value };
},
Value => return parseError(ctx, "TODO implement parseParameterGeneric for type Value", .{}),
else => @compileError("Unimplemented: ir parseParameterGeneric for type " ++ @typeName(T)),
@ -319,7 +336,7 @@ fn parseBody(ctx: *ParseContext) !Inst.Fn.Body {
while (ctx.i < ctx.source.len) : (ctx.i += 1) switch (ctx.source[ctx.i]) {
';' => _ = try skipToAndOver(ctx, '\n'),
'%' => {
const at_start = ctx.i;
ctx.i += 1;
const ident = try skipToAndOver(ctx, ' ');
const opt_type = try parseOptionalType(ctx);
const inst = try parseInstruction(ctx, opt_type);
@ -452,3 +469,6 @@ fn findLineColumn(source: []const u8, byte_offset: usize) struct { line: usize,
}
return .{ .line = line, .column = column };
}
// Performance optimization ideas:
// * make the source code sentinel-terminated, so that all the checks against the length can be skipped