FastISel support for debug info.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56610 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index 9e12a27..cbb1762 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -718,12 +718,27 @@
BasicBlock::iterator BI = Begin;
// Lower any arguments needed in this block if this is the entry block.
- if (LLVMBB == &Fn.getEntryBlock())
+ bool SuppressFastISel = false;
+ if (LLVMBB == &Fn.getEntryBlock()) {
LowerArguments(LLVMBB);
+ // If any of the arguments has the byval attribute, forgo
+ // fast-isel in the entry block.
+ if (EnableFastISel) {
+ unsigned j = 1;
+ for (Function::arg_iterator I = Fn.arg_begin(), E = Fn.arg_end();
+ I != E; ++I, ++j)
+ if (Fn.paramHasAttr(j, ParamAttr::ByVal)) {
+ cerr << "FastISel skips entry block due to byval argument";
+ SuppressFastISel = true;
+ break;
+ }
+ }
+ }
+
// Before doing SelectionDAG ISel, see if FastISel has been requested.
// FastISel doesn't support EH landing pads, which require special handling.
- if (EnableFastISel && !BB->isLandingPad()) {
+ if (EnableFastISel && !SuppressFastISel && !BB->isLandingPad()) {
if (FastISel *F = TLI.createFastISel(*FuncInfo->MF, MMI,
FuncInfo->ValueMap,
FuncInfo->MBBMap,
@@ -761,6 +776,9 @@
// Then handle certain instructions as single-LLVM-Instruction blocks.
if (isa<CallInst>(BI)) {
+ cerr << "FastISel missed call: ";
+ BI->dump();
+
if (BI->getType() != Type::VoidTy) {
unsigned &R = FuncInfo->ValueMap[BI];
if (!R)