I don't see any point in having both eh.selector.i32 and eh.selector.i64,

so get rid of eh.selector.i64 and rename eh.selector.i32 to eh.selector.
Likewise for eh.typeid.for.  This aligns us with gcc, which always uses a
32 bit value for the selector on all platforms.  My understanding is that
the register allocator used to assert if the selector intrinsic size didn't
match the pointer size, and this was the reason for introducing the two
variants.  However my testing shows that this is no longer the case (I
fixed some bugs in selector lowering yesterday, and some more today in the
fastisel path; these might have caused the original problems).

llvm-svn: 84106

2 files changed, 22 insertions, 19 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
index ee408dcb268..8e955aff98f 100644
--- a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -442,15 +442,11 @@ bool FastISel::SelectCall(User *I) {
     }
     break;
   }
-  case Intrinsic::eh_selector_i32:
-  case Intrinsic::eh_selector_i64: {
+  case Intrinsic::eh_selector: {
     EVT VT = TLI.getValueType(I->getType());
     switch (TLI.getOperationAction(ISD::EHSELECTION, VT)) {
     default: break;
     case TargetLowering::Expand: {
-      EVT VT = (IID == Intrinsic::eh_selector_i32 ?
-                           MVT::i32 : MVT::i64);
-
       if (MMI) {
         if (MBB->isLandingPad())
           AddCatchInfo(*cast<CallInst>(I), MMI, MBB);
@@ -464,12 +460,25 @@ bool FastISel::SelectCall(User *I) {
         }
 
         unsigned Reg = TLI.getExceptionSelectorRegister();
-        const TargetRegisterClass *RC = TLI.getRegClassFor(VT);
+        EVT SrcVT = TLI.getPointerTy();
+        const TargetRegisterClass *RC = TLI.getRegClassFor(SrcVT);
         unsigned ResultReg = createResultReg(RC);
-        bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg,
-                                             Reg, RC, RC);
+        bool InsertedCopy = TII.copyRegToReg(*MBB, MBB->end(), ResultReg, Reg,
+                                             RC, RC);
         assert(InsertedCopy && "Can't copy address registers!");
         InsertedCopy = InsertedCopy;
+
+        // Cast the register to the type of the selector.
+        if (SrcVT.bitsGT(MVT::i32))
+          ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32, ISD::TRUNCATE,
+                                 ResultReg);
+        else if (SrcVT.bitsLT(MVT::i32))
+          ResultReg = FastEmit_r(SrcVT.getSimpleVT(), MVT::i32,
+                                 ISD::SIGN_EXTEND, ResultReg);
+        if (ResultReg == 0)
+          // Unhandled operand. Halt "fast" selection and bail.
+          return false;
+
         UpdateValueMap(I, ResultReg);
       } else {
         unsigned ResultReg =
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
index 6df3fe6996c..9017e435962 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuild.cpp
@@ -3973,8 +3973,7 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
     return 0;
   }
 
-  case Intrinsic::eh_selector_i32:
-  case Intrinsic::eh_selector_i64: {
+  case Intrinsic::eh_selector: {
     MachineModuleInfo *MMI = DAG.getMachineModuleInfo();
 
     if (CurMBB->isLandingPad())
@@ -3997,27 +3996,22 @@ SelectionDAGLowering::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
 
     DAG.setRoot(Op.getValue(1));
 
-    MVT::SimpleValueType VT =
-      (Intrinsic == Intrinsic::eh_selector_i32 ? MVT::i32 : MVT::i64);
-    setValue(&I, DAG.getSExtOrTrunc(Op, dl, VT));
+    setValue(&I, DAG.getSExtOrTrunc(Op, dl, MVT::i32));
     return 0;
   }
 
-  case Intrinsic::eh_typeid_for_i32:
-  case Intrinsic::eh_typeid_for_i64: {
+  case Intrinsic::eh_typeid_for: {
     MachineModuleInfo *MMI = DAG.getMachineModuleInfo();
-    EVT VT = (Intrinsic == Intrinsic::eh_typeid_for_i32 ?
-                         MVT::i32 : MVT::i64);
 
     if (MMI) {
       // Find the type id for the given typeinfo.
       GlobalVariable *GV = ExtractTypeInfo(I.getOperand(1));
 
       unsigned TypeID = MMI->getTypeIDFor(GV);
-      setValue(&I, DAG.getConstant(TypeID, VT));
+      setValue(&I, DAG.getConstant(TypeID, MVT::i32));
     } else {
       // Return something different to eh_selector.
-      setValue(&I, DAG.getConstant(1, VT));
+      setValue(&I, DAG.getConstant(1, MVT::i32));
     }
 
     return 0;