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Add support for global constants, and for initializers for constants

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@598 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2001-09-18 04:01:05 +00:00
parent 1781acab34
commit d70684f758
7 changed files with 96 additions and 21 deletions
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lib/Bytecode/Reader/Reader.cpp
+17 -2
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@@ -323,14 +323,29 @@ bool BytecodeParser::ParseModuleGlobalInfo(const uchar *&Buf, const uchar *End,
unsigned VarType;
if (read_vbr(Buf, End, VarType)) return failure(true);
while (VarType != Type::VoidTyID) { // List is terminated by Void
const Type *Ty = getType(VarType);
// VarType Fields: bit0 = isConstant, bit1 = hasInitializer, bit2+ = slot#
const Type *Ty = getType(VarType >> 2);
if (!Ty || !Ty->isPointerType()) {
cerr << "Global not pointer type! Ty = " << Ty << endl;
return failure(true);
}
ConstPoolVal *Initializer = 0;
if (VarType & 2) { // Does it have an initalizer?
// Do not improvise... values must have been stored in the constant pool,
// which should have been read before now.
//
unsigned InitSlot;
if (read_vbr(Buf, End, InitSlot)) return failure(true);
Value *V = getValue(Ty->castPointerType()->getValueType(),
InitSlot, false);
if (V == 0) return failure(true);
Initializer = V->castConstantAsserting();
}
// Create the global variable...
GlobalVariable *GV = new GlobalVariable(Ty);
GlobalVariable *GV = new GlobalVariable(Ty, VarType & 1, Initializer);
insertValue(GV, ModuleValues);
C->getGlobalList().push_back(GV);