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x86_64: canonicalise loops

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This commit is contained in:
Jacob Young 2023-04-03 01:34:05 -04:00 committed by Jakub Konka
parent fde1ec5d0e
commit cd24ab7f6e
1 changed files with 22 additions and 1 deletions
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23
src/arch/x86_64/CodeGen.zig
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@ -6132,7 +6132,28 @@ fn airLoop(self: *Self, inst: Air.Inst.Index) !void {
const loop = self.air.extraData(Air.Block, ty_pl.payload);
const body = self.air.extra[loop.end..][0..loop.data.body_len];
const jmp_target = @intCast(u32, self.mir_instructions.len);
try self.genBody(body);
{
try self.branch_stack.append(.{});
errdefer _ = self.branch_stack.pop();
try self.genBody(body);
}
var branch = self.branch_stack.pop();
defer branch.deinit(self.gpa);
log.debug("airLoop: %{d}", .{inst});
log.debug("Upper branches:", .{});
for (self.branch_stack.items) |bs| {
log.debug("{}", .{bs.fmtDebug()});
}
log.debug("Loop branch: {}", .{branch.fmtDebug()});
var dummy_branch = Branch{};
defer dummy_branch.deinit(self.gpa);
try self.canonicaliseBranches(true, &dummy_branch, &branch, true, false);
_ = try self.asmJmpReloc(jmp_target);
return self.finishAirBookkeeping();
}