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encode/decode function alignment in bc files

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24218 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-11-06 07:43:39 +00:00
parent afedcb36aa
commit e73bd45c1d
2 changed files with 30 additions and 24 deletions
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lib/Bytecode/Writer/Writer.cpp
+14 -10
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@@ -949,9 +949,8 @@ void BytecodeWriter::outputModuleInfoBlock(const Module *M) {
// The extension word has this format: bit 0 = has initializer, bit 1-3 =
// linkage, bit 4-8 = alignment (log2), bits 10+ = future use.
unsigned ExtWord = I->hasInitializer() | (getEncodedLinkage(I) << 1) |
(Log2_32(I->getAlignment())+1) << 4;
((Log2_32(I->getAlignment())+1) << 4);
output_vbr(ExtWord);
}
// If we have an initializer, output it now.
@@ -968,18 +967,23 @@ void BytecodeWriter::outputModuleInfoBlock(const Module *M) {
int Slot = Table.getSlot(I->getType());
assert(Slot != -1 && "Module slot calculator is broken!");
assert(Slot >= Type::FirstDerivedTyID && "Derived type not in range!");
assert(((Slot << 5) >> 5) == Slot && "Slot # too big!");
unsigned ID = (Slot << 5);
if (I->getCallingConv() < 15)
ID += I->getCallingConv()+1;
assert(((Slot << 6) >> 6) == Slot && "Slot # too big!");
unsigned ID = (Slot << 5) | (I->getCallingConv() & 15);
if (I->isExternal()) // If external, we don't have an FunctionInfo block.
ID |= 1 << 4;
if (I->getAlignment() || I->getCallingConv() & ~15)
ID |= 1 << 31; // Do we need an extension word?
output_vbr(ID);
if (I->getCallingConv() >= 15)
output_vbr(I->getCallingConv());
if (ID & (1 << 31)) {
// Extension byte: bits 0-4 = alignment, bits 5-9 = top nibble of calling
// convention.
ID = (Log2_32(I->getAlignment())+1) | ((I->getCallingConv() >> 4) << 5);
output_vbr(ID);
}
}
output_vbr((unsigned)Table.getSlot(Type::VoidTy) << 5);