[llvm-commits] [llvm] r81195 - /llvm/trunk/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp

[Chris Lattner]

Author: lattner
Date: Tue Sep  8 00:49:25 2009
New Revision: 81195

URL: http://llvm.org/viewvc/llvm-project?rev=81195&view=rev
Log:
add a hack to lower MOV16r0 to MOV32r0 in MCInstLower, eliminating
the problem with subreg32 modifiers.  This gets all of Olden working
with the new asmprinter.

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=81195&r1=81194&r2=81195&view=diff

==============================================================================
--- llvm/trunk/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp (original)
+++ llvm/trunk/lib/Target/X86/AsmPrinter/X86MCInstLower.cpp Tue Sep  8 00:49:25 2009
@@ -39,6 +39,13 @@
 }
 
 
+static void lower_subreg32(MCInst *MI, unsigned OpNo) {
+  // Convert registers in the addr mode according to subreg32.
+  unsigned Reg = MI->getOperand(OpNo).getReg();
+  if (Reg != 0)
+    MI->getOperand(OpNo).setReg(getX86SubSuperRegister(Reg, MVT::i32));
+}
+
 
 static void lower_lea64_32mem(MCInst *MI, unsigned OpNo) {
   // Convert registers in the addr mode according to subreg64.
@@ -302,6 +309,11 @@
     // Handle the 'subreg rewriting' for the lea64_32mem operand.
     lower_lea64_32mem(&TmpInst, 1);
     break;
+      
+  case X86::MOV16r0:
+    TmpInst.setOpcode(X86::MOV32r0);
+    lower_subreg32(&TmpInst, 0);
+    break;
   }
   
   printInstruction(&TmpInst);