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Add PPC AsmPrinter handling for target-specific form of 

DBG_VALUE, and a cautionary comment.

llvm-svn: 102371
This commit is contained in:
Dale Johannesen 2010-04-26 20:05:01 +00:00
parent 954daf9aa5
commit bc41cfa78f
2 changed files with 21 additions and 0 deletions
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3
llvm/include/llvm/Target/TargetInstrInfo.h
View File

@ -367,6 +367,9 @@ public:
/// normally be lowered the same way as other addresses on the target,
/// e.g. in load instructions. For targets that do not support this
/// the debug info is simply lost.
/// If you add this for a target you should handle this DBG_VALUE in the
/// target-specific AsmPrinter code as well; you will probably get invalid
/// assembly output if you don't.
virtual MachineInstr *emitFrameIndexDebugValue(MachineFunction &MF,
unsigned FrameIx,
uint64_t Offset,

18
llvm/lib/Target/PowerPC/AsmPrinter/PPCAsmPrinter.cpp
View File

@ -21,6 +21,7 @@
#include "PPCPredicates.h"
#include "PPCTargetMachine.h"
#include "PPCSubtarget.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
@ -535,6 +536,23 @@ void PPCAsmPrinter::EmitInstruction(const MachineInstr *MI) {
SmallString<128> Str;
raw_svector_ostream O(Str);
if (MI->getOpcode() == TargetOpcode::DBG_VALUE) {
unsigned NOps = MI->getNumOperands();
assert(NOps==4);
O << '\t' << MAI->getCommentString() << "DEBUG_VALUE: ";
// cast away const; DIetc do not take const operands for some reason.
DIVariable V(const_cast<MDNode *>(MI->getOperand(NOps-1).getMetadata()));
O << V.getName();
O << " <- ";
// Frame address. Currently handles register +- offset only.
assert(MI->getOperand(0).isReg() && MI->getOperand(1).isImm());
O << '['; printOperand(MI, 0, O); O << '+'; printOperand(MI, 1, O);
O << ']';
O << "+";
printOperand(MI, NOps-2, O);
OutStreamer.EmitRawText(O.str());
return;
}
// Check for slwi/srwi mnemonics.
if (MI->getOpcode() == PPC::RLWINM) {
unsigned char SH = MI->getOperand(2).getImm();