From 9ae4dec7b8ce79587bde200fa8fadefe7f81d2bf Mon Sep 17 00:00:00 2001 From: Richard-Qin-X Date: Wed, 12 Aug 2026 00:06:12 +0800 Subject: [MIR] Accept empty optional register fields --- backend/lib/MIR/MIRFunctionParser.cpp | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) (limited to 'backend/lib/MIR/MIRFunctionParser.cpp') diff --git a/backend/lib/MIR/MIRFunctionParser.cpp b/backend/lib/MIR/MIRFunctionParser.cpp index a59e4bd..68bc0aa 100644 --- a/backend/lib/MIR/MIRFunctionParser.cpp +++ b/backend/lib/MIR/MIRFunctionParser.cpp @@ -285,12 +285,17 @@ bool MIRDocumentParser::parseRegisters(const yaml::Node &Root, MachineFunction & } if (const yaml::Node *Preferred = mappingValue(*Element, "preferred-register")) { + std::string_view PreferredName; PhysicalRegister Reg; - if (physicalRegister(*Preferred, Reg)) + if (scalar(*Preferred, PreferredName, "physical register")) return true; - auto AddResult = Function.registerInfo().addAllocationHint(*Created, Reg); - if (!AddResult) - return importError(Preferred->range(), AddResult.error()); + if (!trim(PreferredName).empty()) { + if (physicalRegister(PreferredName, Preferred->range(), Reg)) + return true; + auto AddResult = Function.registerInfo().addAllocationHint(*Created, Reg); + if (!AddResult) + return importError(Preferred->range(), AddResult.error()); + } } if (const yaml::Node *Flags = mappingValue(*Element, "flags")) { if (requireKind(*Flags, yaml::NodeKind::Sequence, "virtual-register flags")) -- cgit v1.2.3