+ // Collect llvm.dbg.declare information. This is done now instead of
+ // during the initial isel pass through the IR so that it is done
+ // in a predictable order.
+ if (const DbgDeclareInst *DI = dyn_cast<DbgDeclareInst>(I)) {
+ MachineModuleInfo &MMI = MF->getMMI();
+ if (MMI.hasDebugInfo() &&
+ DIVariable(DI->getVariable()).Verify() &&
+ !DI->getDebugLoc().isUnknown()) {
+ // Don't handle byval struct arguments or VLAs, for example.
+ // Non-byval arguments are handled here (they refer to the stack
+ // temporary alloca at this point).
+ const Value *Address = DI->getAddress();
+ if (Address) {
+ if (const BitCastInst *BCI = dyn_cast<BitCastInst>(Address))
+ Address = BCI->getOperand(0);
+ if (const AllocaInst *AI = dyn_cast<AllocaInst>(Address)) {
+ DenseMap<const AllocaInst *, int>::iterator SI =
+ StaticAllocaMap.find(AI);
+ if (SI != StaticAllocaMap.end()) { // Check for VLAs.
+ int FI = SI->second;
+ MMI.setVariableDbgInfo(DI->getVariable(),
+ FI, DI->getDebugLoc());
+ }
+ }
+ }
+ }
+ }
+ }
+