[llvm-commits] [llvm] r94693 - /llvm/trunk/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp

[Dale Johannesen]

Author: johannes
Date: Wed Jan 27 16:11:16 2010
New Revision: 94693

URL: http://llvm.org/viewvc/llvm-project?rev=94693&view=rev
Log:
Treat MO_REG 0 location as undefined in DEBUG_VALUE,
per document.


Modified:
    llvm/trunk/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp

Modified: llvm/trunk/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp?rev=94693&r1=94692&r2=94693&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp (original)
+++ llvm/trunk/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp Wed Jan 27 16:11:16 2010
@@ -428,10 +428,16 @@
     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);