mirror/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2025-12-31 02:23:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

Sema: balance dbg_block_begins in case of early return

Browse Source
This commit is contained in:
Veikka Tuominen 2022-03-18 22:21:51 +02:00
parent 739734170e
commit f19731948e
1 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
src/Sema.zig
View File

@ -614,6 +614,8 @@ fn analyzeBodyInner(
crash_info.push();
defer crash_info.pop();
var dbg_block_begins: u32 = 0;
// We use a while(true) loop here to avoid a redundant way of breaking out of
// the loop. The only way to break out of the loop is with a `noreturn`
// instruction.
@ -884,11 +886,13 @@ fn analyzeBodyInner(
.prefetch => try sema.zirPrefetch( block, extended),
// zig fmt: on
.dbg_block_begin => {
dbg_block_begins += 1;
try sema.zirDbgBlockBegin(block);
i += 1;
continue;
},
.dbg_block_end => {
dbg_block_begins -= 1;
try sema.zirDbgBlockEnd(block);
i += 1;
continue;
@ -1221,6 +1225,19 @@ fn analyzeBodyInner(
i += 1;
} else unreachable;
// balance out dbg_block_begins in case of early noreturn
const noreturn_inst = block.instructions.popOrNull();
while (dbg_block_begins > 0) {
dbg_block_begins -= 1;
if (block.is_comptime or sema.mod.comp.bin_file.options.strip) continue;
_ = try block.addInst(.{
.tag = .dbg_block_end,
.data = undefined,
});
}
if (noreturn_inst) |some| try block.instructions.append(sema.gpa, some);
if (!wip_captures.finalized) {
try wip_captures.finalize();
block.wip_capture_scope = parent_capture_scope;