Add suppport for ConstantExprs of shufflevectors whose result type is not equal to the
type of the vectors being shuffled.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64401 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Bitcode/Writer/BitcodeWriter.cpp b/lib/Bitcode/Writer/BitcodeWriter.cpp
index e37c439..5633f0f 100644
--- a/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -643,7 +643,16 @@
Record.push_back(VE.getValueID(C->getOperand(2)));
break;
case Instruction::ShuffleVector:
- Code = bitc::CST_CODE_CE_SHUFFLEVEC;
+ // If the return type and argument types are the same, this is a
+ // standard shufflevector instruction. If the types are different,
+ // then the shuffle is widening or truncating the input vectors, and
+ // the argument type must also be encoded.
+ if (C->getType() == C->getOperand(0)->getType()) {
+ Code = bitc::CST_CODE_CE_SHUFFLEVEC;
+ } else {
+ Code = bitc::CST_CODE_CE_SHUFVEC_EX;
+ Record.push_back(VE.getTypeID(C->getOperand(0)->getType()));
+ }
Record.push_back(VE.getValueID(C->getOperand(0)));
Record.push_back(VE.getValueID(C->getOperand(1)));
Record.push_back(VE.getValueID(C->getOperand(2)));