[llvm-commits] [llvm] r50180 - in /llvm/trunk: lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp test/CodeGen/Generic/getresult-undef.ll

[Dan Gohman]

Author: djg
Date: Wed Apr 23 15:21:29 2008
New Revision: 50180

URL: http://llvm.org/viewvc/llvm-project?rev=50180&view=rev
Log:
Add support to codegen for getresult instructions with undef operands.

Added:
    llvm/trunk/test/CodeGen/Generic/getresult-undef.ll
Modified:
    llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp

Modified: llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp?rev=50180&r1=50179&r2=50180&view=diff

==============================================================================
--- llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp (original)
+++ llvm/trunk/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp Wed Apr 23 15:21:29 2008
@@ -3311,8 +3311,13 @@
 
 
 void SelectionDAGLowering::visitGetResult(GetResultInst &I) {
-  SDOperand Call = getValue(I.getOperand(0));
-  setValue(&I, SDOperand(Call.Val, I.getIndex()));
+  if (UndefValue *UV = dyn_cast<UndefValue>(I.getOperand(0))) {
+    SDOperand Undef = DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()));
+    setValue(&I, Undef);
+  } else {
+    SDOperand Call = getValue(I.getOperand(0));
+    setValue(&I, SDOperand(Call.Val, I.getIndex()));
+  }
 }
 
 

Added: llvm/trunk/test/CodeGen/Generic/getresult-undef.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Generic/getresult-undef.ll?rev=50180&view=auto

==============================================================================
--- llvm/trunk/test/CodeGen/Generic/getresult-undef.ll (added)
+++ llvm/trunk/test/CodeGen/Generic/getresult-undef.ll Wed Apr 23 15:21:29 2008
@@ -0,0 +1,6 @@
+; RUN: llvm-as < %s | llc
+
+define double @foo() {
+  %t = getresult {double, double} undef, 1
+  ret double %t
+}