Don't send PHI nodes down to SelectionDAGBuilder of FastISel, since

they end up doing nothing.

llvm-svn: 101904

1 files changed, 4 insertions, 4 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
index cd72fe7003d..8f53c5caaeb 100644
--- a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -52,6 +52,7 @@
 #include "llvm/Target/TargetInstrInfo.h"
 #include "llvm/Target/TargetLowering.h"
 #include "llvm/Target/TargetMachine.h"
+#include "llvm/Support/ErrorHandling.h"
 #include "FunctionLoweringInfo.h"
 using namespace llvm;
 
@@ -692,10 +693,6 @@ FastISel::SelectOperator(const User *I, unsigned Opcode) {
     // Nothing to emit.
     return true;
 
-  case Instruction::PHI:
-    // PHI nodes are already emitted.
-    return true;
-
   case Instruction::Alloca:
     // FunctionLowering has the static-sized case covered.
     if (StaticAllocaMap.count(cast<AllocaInst>(I)))
@@ -735,6 +732,9 @@ FastISel::SelectOperator(const User *I, unsigned Opcode) {
     return true;
   }
 
+  case Instruction::PHI:
+    llvm_unreachable("FastISel shouldn't visit PHI nodes!");
+
   default:
     // Unhandled instruction. Halt "fast" selection and bail.
     return false;