R600: Handle reversed true/false values in selectcc

git-svn-id: https://llvm.org/svn/llvm-project/llvm/branches/R600/@165528 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 6 deletions

diff --git a/lib/Target/AMDGPU/R600ISelLowering.cpp b/lib/Target/AMDGPU/R600ISelLowering.cpp
index 121f49426e..da1de57777 100644
--- a/lib/Target/AMDGPU/R600ISelLowering.cpp
+++ b/lib/Target/AMDGPU/R600ISelLowering.cpp
@@ -603,6 +603,14 @@ SDValue R600TargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const
   // We need all the operands of SELECT_CC to have the same value type, so if
   // necessary we need to change True and False to be the same type as LHS and
   // RHS, and then convert the result of the select_cc back to the correct type.
+
+  // Move hardware True/False values to the correct operand.
+  if (isHWTrueValue(False) && isHWFalseValue(True)) {
+    ISD::CondCode CCOpcode = cast<CondCodeSDNode>(CC)->get();
+    std::swap(False, True);
+    CC = DAG.getCondCode(ISD::getSetCCInverse(CCOpcode, CompareVT == MVT::i32));
+  }
+
   if (isHWTrueValue(True) && isHWFalseValue(False)) {
     if (CompareVT !=  VT) {
       if (VT == MVT::f32 && CompareVT == MVT::i32) {
@@ -636,12 +644,6 @@ SDValue R600TargetLowering::LowerSELECT_CC(SDValue Op, SelectionDAG &DAG) const
     }
   }
 
-  // XXX If True is a hardware TRUE value and False is a hardware FALSE value,
-  // we can handle this with a native instruction, but we need to swap true
-  // and false and change the conditional.
-  if (isHWTrueValue(False) && isHWFalseValue(True)) {
-  }
-
   // If we make it this for it means we have no native instructions to handle
   // this SELECT_CC, so we must lower it.
   SDValue HWTrue, HWFalse;