Don't send PHI nodes down to SelectionDAGBuilder of FastISel, since
they end up doing nothing.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@101904 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index cd72fe7..8f53c5c 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/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 @@
// 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 @@
return true;
}
+ case Instruction::PHI:
+ llvm_unreachable("FastISel shouldn't visit PHI nodes!");
+
default:
// Unhandled instruction. Halt "fast" selection and bail.
return false;