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astgen: fix continue expressions

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This commit is contained in:
Andrew Kelley 2021-03-26 18:26:39 -07:00
parent a217ad59c7
commit a72bfd00cf
2 changed files with 97 additions and 99 deletions
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18
src/astgen.zig
View File

@ -766,11 +766,9 @@ fn breakExpr(mod: *Module, parent_scope: *Scope, node: ast.Node.Index) InnerErro
}
fn continueExpr(mod: *Module, parent_scope: *Scope, node: ast.Node.Index) InnerError!zir.Inst.Ref {
if (true) @panic("TODO update for zir-memory-layout");
const tree = parent_scope.tree();
const parent_gz = parent_scope.getGenZir();
const tree = parent_gz.tree();
const node_datas = tree.nodes.items(.data);
const main_tokens = tree.nodes.items(.main_token);
const break_label = node_datas[node].lhs;
// Look for the label in the scope.
@ -779,10 +777,11 @@ fn continueExpr(mod: *Module, parent_scope: *Scope, node: ast.Node.Index) InnerE
switch (scope.tag) {
.gen_zir => {
const gen_zir = scope.cast(Scope.GenZir).?;
const continue_block = gen_zir.continue_block orelse {
const continue_block = gen_zir.continue_block;
if (continue_block == 0) {
scope = gen_zir.parent;
continue;
};
}
if (break_label != 0) blk: {
if (gen_zir.label) |*label| {
if (try tokenIdentEql(mod, parent_scope, label.token, break_label)) {
@ -795,9 +794,8 @@ fn continueExpr(mod: *Module, parent_scope: *Scope, node: ast.Node.Index) InnerE
continue;
}
_ = try addZirInstTag(mod, parent_scope, src, .break_void, .{
.block = continue_block,
});
// TODO emit a break_inline if the loop being continued is inline
_ = try parent_gz.addBreak(.@"break", continue_block, .void_value);
return zir.Inst.Ref.unreachable_value;
},
.local_val => scope = scope.cast(Scope.LocalVal).?.parent,
@ -806,7 +804,7 @@ fn continueExpr(mod: *Module, parent_scope: *Scope, node: ast.Node.Index) InnerE
const label_name = try mod.identifierTokenString(parent_scope, break_label);
return mod.failTok(parent_scope, break_label, "label not found: '{s}'", .{label_name});
} else {
return mod.failTok(parent_scope, src, "continue expression outside loop", .{});
return mod.failNode(parent_scope, node, "continue expression outside loop", .{});
},
}
}

178
test/stage2/test.zig
View File

@ -1128,97 +1128,97 @@ pub fn addCases(ctx: *TestContext) !void {
, &[_][]const u8{":4:8: error: unable to infer variable type"});
}
//{
// var case = ctx.exe("break/continue", linux_x64);
{
var case = ctx.exe("break/continue", linux_x64);
// // Break out of loop
// case.addCompareOutput(
// \\export fn _start() noreturn {
// \\ while (true) {
// \\ break;
// \\ }
// \\
// \\ exit();
// \\}
// \\
// \\fn exit() noreturn {
// \\ asm volatile ("syscall"
// \\ :
// \\ : [number] "{rax}" (231),
// \\ [arg1] "{rdi}" (0)
// \\ : "rcx", "r11", "memory"
// \\ );
// \\ unreachable;
// \\}
// ,
// "",
// );
// case.addCompareOutput(
// \\export fn _start() noreturn {
// \\ foo: while (true) {
// \\ break :foo;
// \\ }
// \\
// \\ exit();
// \\}
// \\
// \\fn exit() noreturn {
// \\ asm volatile ("syscall"
// \\ :
// \\ : [number] "{rax}" (231),
// \\ [arg1] "{rdi}" (0)
// \\ : "rcx", "r11", "memory"
// \\ );
// \\ unreachable;
// \\}
// ,
// "",
// );
// Break out of loop
case.addCompareOutput(
\\export fn _start() noreturn {
\\ while (true) {
\\ break;
\\ }
\\
\\ exit();
\\}
\\
\\fn exit() noreturn {
\\ asm volatile ("syscall"
\\ :
\\ : [number] "{rax}" (231),
\\ [arg1] "{rdi}" (0)
\\ : "rcx", "r11", "memory"
\\ );
\\ unreachable;
\\}
,
"",
);
case.addCompareOutput(
\\export fn _start() noreturn {
\\ foo: while (true) {
\\ break :foo;
\\ }
\\
\\ exit();
\\}
\\
\\fn exit() noreturn {
\\ asm volatile ("syscall"
\\ :
\\ : [number] "{rax}" (231),
\\ [arg1] "{rdi}" (0)
\\ : "rcx", "r11", "memory"
\\ );
\\ unreachable;
\\}
,
"",
);
// // Continue in loop
// case.addCompareOutput(
// \\export fn _start() noreturn {
// \\ var i: u64 = 0;
// \\ while (true) : (i+=1) {
// \\ if (i == 4) exit();
// \\ continue;
// \\ }
// \\}
// \\
// \\fn exit() noreturn {
// \\ asm volatile ("syscall"
// \\ :
// \\ : [number] "{rax}" (231),
// \\ [arg1] "{rdi}" (0)
// \\ : "rcx", "r11", "memory"
// \\ );
// \\ unreachable;
// \\}
// ,
// "",
// );
// case.addCompareOutput(
// \\export fn _start() noreturn {
// \\ var i: u64 = 0;
// \\ foo: while (true) : (i+=1) {
// \\ if (i == 4) exit();
// \\ continue :foo;
// \\ }
// \\}
// \\
// \\fn exit() noreturn {
// \\ asm volatile ("syscall"
// \\ :
// \\ : [number] "{rax}" (231),
// \\ [arg1] "{rdi}" (0)
// \\ : "rcx", "r11", "memory"
// \\ );
// \\ unreachable;
// \\}
// ,
// "",
// );
//}
// Continue in loop
case.addCompareOutput(
\\export fn _start() noreturn {
\\ var i: u64 = 0;
\\ while (true) : (i+=1) {
\\ if (i == 4) exit();
\\ continue;
\\ }
\\}
\\
\\fn exit() noreturn {
\\ asm volatile ("syscall"
\\ :
\\ : [number] "{rax}" (231),
\\ [arg1] "{rdi}" (0)
\\ : "rcx", "r11", "memory"
\\ );
\\ unreachable;
\\}
,
"",
);
case.addCompareOutput(
\\export fn _start() noreturn {
\\ var i: u64 = 0;
\\ foo: while (true) : (i+=1) {
\\ if (i == 4) exit();
\\ continue :foo;
\\ }
\\}
\\
\\fn exit() noreturn {
\\ asm volatile ("syscall"
\\ :
\\ : [number] "{rax}" (231),
\\ [arg1] "{rdi}" (0)
\\ : "rcx", "r11", "memory"
\\ );
\\ unreachable;
\\}
,
"",
);
}
{
var case = ctx.exe("unused labels", linux_x64);