Add comment re byval args. Doesn't actually work this way yet.
xs
llvm-svn: 102316
diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
index c40eaf6..8aa37a0 100644
--- a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -340,6 +340,8 @@
return true;
const AllocaInst *AI = dyn_cast<AllocaInst>(Address);
// Don't handle byval struct arguments or VLAs, for example.
+ // Note that if we have a byval struct argument, fast ISel is turned off;
+ // those are handled in SelectionDAGBuilder.
if (!AI) break;
DenseMap<const AllocaInst*, int>::iterator SI =
StaticAllocaMap.find(AI);
@@ -347,7 +349,7 @@
int FI = SI->second;
if (!DI->getDebugLoc().isUnknown())
MF.getMMI().setVariableDbgInfo(DI->getVariable(), FI, DI->getDebugLoc());
-
+
// Building the map above is target independent. Generating DBG_VALUE
// inline is target dependent; do this now.
(void)TargetSelectInstruction(cast<Instruction>(I));