diff options
Diffstat (limited to 'lib/Target/X86/InstSelectSimple.cpp')
| -rw-r--r-- | lib/Target/X86/InstSelectSimple.cpp | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/lib/Target/X86/InstSelectSimple.cpp b/lib/Target/X86/InstSelectSimple.cpp index f8be684500..40d757b645 100644 --- a/lib/Target/X86/InstSelectSimple.cpp +++ b/lib/Target/X86/InstSelectSimple.cpp @@ -114,9 +114,10 @@ namespace { abort(); } - void promote32(unsigned targetReg, Value *V); - - // emitGEPOperation - Common code shared between visitGetElemenPtrInst and + /// promote32 - Make a value 32-bits wide, and put it somewhere. + void promote32 (const unsigned targetReg, Value *v); + + // emitGEPOperation - Common code shared between visitGetElementPtrInst and // constant expression GEP support. // void emitGEPOperation(Value *Src, User::op_iterator IdxBegin, @@ -156,7 +157,25 @@ namespace { // Move the address of the global into the register BuildMI(BB, X86::MOVir32, 1, Reg).addReg(GV); } else if (Argument *A = dyn_cast<Argument>(V)) { - std::cerr << "ERROR: Arguments not implemented in SimpleInstSel\n"; + // Find the position of the argument in the argument list. + const Function *f = F->getFunction (); + int counter = 0, argPosition = -1; + for (Function::const_aiterator ai = f->abegin (), ae = f->aend (); + ai != ae; ++ai) { + ++counter; + if (&(*ai) == A) { + argPosition = counter; + } + } + assert (argPosition != -1 + && "Argument not found in current function's argument list"); + // Load it out of the stack frame at EBP + 4*argPosition. + // (First, load Reg with argPosition, then load Reg with DWORD + // PTR [EBP + 4*Reg].) + BuildMI (BB, X86::MOVir32, 1, Reg).addZImm (argPosition); + BuildMI (BB, X86::MOVmr32, 4, + Reg).addReg (X86::EBP).addZImm (4).addReg (Reg).addSImm (0); + // std::cerr << "ERROR: Arguments not implemented in SimpleInstSel\n"; } return Reg; |