implement the 'string constant' optimization. This shrinks kc.bit from
2878544 to 2815788
llvm-svn: 36818
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
index 7198bc0..a29f23d 100644
--- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
+++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
@@ -484,6 +484,12 @@
assert (CFP->getType() == Type::DoubleTy && "Unknown FP type!");
Record.push_back(DoubleToBits((double)CFP->getValue()));
}
+ } else if (isa<ConstantArray>(C) && cast<ConstantArray>(C)->isString()) {
+ // Emit constant strings specially.
+ Code = bitc::CST_CODE_STRING;
+ for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
+ Record.push_back(cast<ConstantInt>(C->getOperand(i))->getZExtValue());
+
} else if (isa<ConstantArray>(C) || isa<ConstantStruct>(V) ||
isa<ConstantVector>(V)) {
Code = bitc::CST_CODE_AGGREGATE;