From 714eb731b2df6b4eb5221e76297d4c691ab91b3e Mon Sep 17 00:00:00 2001 From: Dale Johannesen Date: Wed, 27 Jan 2010 22:11:16 +0000 Subject: [PATCH] Treat MO_REG 0 location as undefined in DEBUG_VALUE, per document. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94693 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/X86/AsmPrinter/X86MCInstLower.cpp | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp b/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp index b6a358133bb..9fb6ca4c460 100644 --- a/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp +++ b/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp @@ -428,10 +428,16 @@ void X86AsmPrinter::printInstructionThroughMCStreamer(const MachineInstr *MI) { O << V.getName(); O << " <- "; if (NOps==3) { - // Register or immediate value + // Register or immediate value. Register 0 means undef. assert(MI->getOperand(0).getType()==MachineOperand::MO_Register || MI->getOperand(0).getType()==MachineOperand::MO_Immediate); - printOperand(MI, 0); + if (MI->getOperand(0).getType()==MachineOperand::MO_Register && + MI->getOperand(0).getReg()==0) { + // Suppress offset in this case, it is not meaningful. + O << "undef"; + return; + } else + printOperand(MI, 0); } else { // Frame address. Currently handles register +- offset only. assert(MI->getOperand(0).getType()==MachineOperand::MO_Register);