From: Chris Lattner <sabre@nondot.org>
Date: Tue, 7 Jul 2009 23:03:54 +0000 (+0000)
Subject: add support for legalizing an icmp where the result is illegal (4xi1) but
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=c2c27b3627cf7a8724f2e1ec6a93b1dceea09c25;p=oota-llvm.git

add support for legalizing an icmp where the result is illegal (4xi1) but
the input is legal (4 x i32)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74964 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp b/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
index f356809fbe1..d9eec27e26a 100644
--- a/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
+++ b/lib/CodeGen/SelectionDAG/LegalizeVectorTypes.cpp
@@ -891,15 +891,38 @@ void DAGTypeLegalizer::SplitVecRes_VECTOR_SHUFFLE(ShuffleVectorSDNode *N,
 
 void DAGTypeLegalizer::SplitVecRes_SETCC(SDNode *N, SDValue &Lo, SDValue &Hi) {
   MVT LoVT, HiVT;
-  DebugLoc dl = N->getDebugLoc();
+  DebugLoc DL = N->getDebugLoc();
   GetSplitDestVTs(N->getValueType(0), LoVT, HiVT);
-
+  
+  // Split the input.
+  MVT InVT = N->getOperand(0).getValueType();
   SDValue LL, LH, RL, RH;
-  GetSplitVector(N->getOperand(0), LL, LH);
-  GetSplitVector(N->getOperand(1), RL, RH);
-
-  Lo = DAG.getNode(N->getOpcode(), dl, LoVT, LL, RL, N->getOperand(2));
-  Hi = DAG.getNode(N->getOpcode(), dl, HiVT, LH, RH, N->getOperand(2));
+  switch (getTypeAction(InVT)) {
+  default: assert(0 && "Unexpected type action!");
+  case WidenVector: assert(0 && "Unimp");
+  case Legal: {
+    assert(LoVT == HiVT && "Legal non-power-of-two vector type?");
+    MVT InNVT = MVT::getVectorVT(InVT.getVectorElementType(),
+                                 LoVT.getVectorNumElements());
+    LL = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, N->getOperand(0),
+                     DAG.getIntPtrConstant(0));
+    LH = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, N->getOperand(0),
+                     DAG.getIntPtrConstant(InNVT.getVectorNumElements()));
+    
+    RL = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, N->getOperand(1),
+                     DAG.getIntPtrConstant(0));
+    RH = DAG.getNode(ISD::EXTRACT_SUBVECTOR, DL, InNVT, N->getOperand(1),
+                     DAG.getIntPtrConstant(InNVT.getVectorNumElements()));
+    break;
+  }
+  case SplitVector:
+    GetSplitVector(N->getOperand(0), LL, LH);
+    GetSplitVector(N->getOperand(1), RL, RH);
+    break;
+  }
+  
+  Lo = DAG.getNode(N->getOpcode(), DL, LoVT, LL, RL, N->getOperand(2));
+  Hi = DAG.getNode(N->getOpcode(), DL, HiVT, LH, RH, N->getOperand(2));
 }
 
 //===----------------------------------------------------------------------===//
diff --git a/test/CodeGen/X86/vec_compare.ll b/test/CodeGen/X86/vec_compare.ll
index 87d530dc1be..7a8dfd68cfd 100644
--- a/test/CodeGen/X86/vec_compare.ll
+++ b/test/CodeGen/X86/vec_compare.ll
@@ -5,3 +5,10 @@ define <4 x i32> @test(<4 x i32> %A, <4 x i32> %B) nounwind {
 	ret <4 x i32> %C
 }
 
+
+define <4 x i32> @test2(<4 x i32> %A, <4 x i32> %B) nounwind {
+	%C = icmp sgt <4 x i32> %A, %B
+        %D = sext <4 x i1> %C to <4 x i32>
+	ret <4 x i32> %D
+}
+