From 821164875706dd28e48c6cc3cea5c8ffa6e658d1 Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Wed, 10 Sep 2008 21:01:08 +0000
Subject: [PATCH] FastISel support for i1 constants.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56068 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/SelectionDAG/FastISel.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp
index 8a70b061873..13b1793e05c 100644
--- a/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -33,8 +33,16 @@ unsigned FastISel::getRegForValue(Value *V) {
     return Reg;
 
   MVT::SimpleValueType VT = TLI.getValueType(V->getType()).getSimpleVT();
-  if (!TLI.isTypeLegal(VT))
-    return 0;
+
+  // Ignore illegal types.
+  if (!TLI.isTypeLegal(VT)) {
+    // Promote MVT::i1 to a legal type though, because it's common and easy.
+    if (VT == MVT::i1)
+      VT = TLI.getTypeToTransformTo(VT).getSimpleVT();
+    else
+      return 0;
+  }
+
   if (ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
     if (CI->getValue().getActiveBits() > 64)
       return TargetMaterializeConstant(CI);