[llvm-commits] [llvm] r162214 - in /llvm/trunk: lib/Target/X86/X86ISelLowering.cpp test/CodeGen/X86/pr11334.ll

[Michael Liao]

Author: hliao
Date: Mon Aug 20 12:59:18 2012
New Revision: 162214

URL: http://llvm.org/viewvc/llvm-project?rev=162214&view=rev
Log:
fix a case where all operands of BUILD_VECTOR are undefined


Modified:
    llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
    llvm/trunk/test/CodeGen/X86/pr11334.ll

Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=162214&r1=162213&r2=162214&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Mon Aug 20 12:59:18 2012
@@ -5180,6 +5180,10 @@
     Mask.push_back(cast<ConstantSDNode>(L2In.getOperand(1))->getZExtValue());
   }
 
+  // Quit if all operands of BUILD_VECTOR are undefined.
+  if (!VecIn.getNode())
+    return SDValue();
+
   // Fill the remaining mask as undef.
   for (unsigned i = NumElts; i < VecInVT.getVectorNumElements(); ++i)
     Mask.push_back(-1);

Modified: llvm/trunk/test/CodeGen/X86/pr11334.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/pr11334.ll?rev=162214&r1=162213&r2=162214&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/pr11334.ll (original)
+++ llvm/trunk/test/CodeGen/X86/pr11334.ll Mon Aug 20 12:59:18 2012
@@ -54,3 +54,11 @@
   %f1 = fpext <8 x float> %v1 to <8 x double>
   ret <8 x double> %f1
 }
+
+define void @test_vector_creation() nounwind {
+  %1 = insertelement <4 x double> undef, double 0.000000e+00, i32 2
+  %2 = load double addrspace(1)* null
+  %3 = insertelement <4 x double> %1, double %2, i32 3
+  store <4 x double> %3, <4 x double>* undef
+  ret void
+}