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Add code for emitting the attribute groups.

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This is some initial code for emitting the attribute groups into the bitcode.

NOTE: This format *may* change! Do not rely upon the attribute groups' bitcode
not changing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@174845 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2013-02-10 23:09:32 +00:00
parent 8c2e77f895
commit 0f715c26bd
2 changed files with 61 additions and 8 deletions
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16
include/llvm/Bitcode/LLVMBitCodes.h
View File

@ -29,13 +29,12 @@ namespace bitc {
// Module sub-block id's.
PARAMATTR_BLOCK_ID,
UNUSED_ID1,
PARAMATTR_GROUP_BLOCK_ID,
CONSTANTS_BLOCK_ID,
FUNCTION_BLOCK_ID,
UNUSED_ID2,
UNUSED_ID1,
VALUE_SYMTAB_BLOCK_ID,
METADATA_BLOCK_ID,
@ -69,7 +68,7 @@ namespace bitc {
// ALIAS: [alias type, aliasee val#, linkage, visibility]
MODULE_CODE_ALIAS = 9,
/// MODULE_CODE_PURGEVALS: [numvals]
// MODULE_CODE_PURGEVALS: [numvals]
MODULE_CODE_PURGEVALS = 10,
MODULE_CODE_GCNAME = 11 // GCNAME: [strchr x N]
@ -78,10 +77,11 @@ namespace bitc {
/// PARAMATTR blocks have code for defining a parameter attribute set.
enum AttributeCodes {
// FIXME: Remove `PARAMATTR_CODE_ENTRY_OLD' in 4.0
PARAMATTR_CODE_ENTRY_OLD = 1, // ENTRY: [paramidx0, attr0,
// paramidx1, attr1...]
PARAMATTR_CODE_ENTRY = 2 // ENTRY: [paramidx0, attrgrp0,
// paramidx1, attrgrp1...]
PARAMATTR_CODE_ENTRY_OLD = 1, // ENTRY: [paramidx0, attr0,
// paramidx1, attr1...]
PARAMATTR_CODE_ENTRY = 2, // ENTRY: [paramidx0, attrgrp0,
// paramidx1, attrgrp1, ...]
PARAMATTR_GRP_CODE_ENTRY = 3 // ENTRY: [id, attr0, att1, ...]
};
/// TYPE blocks have codes for each type primitive they use.

53
lib/Bitcode/Writer/BitcodeWriter.cpp
View File

@ -185,6 +185,54 @@ static uint64_t encodeLLVMAttributesForBitcode(AttributeSet Attrs,
return EncodedAttrs;
}
static void WriteAttributeGroupTable(const ValueEnumerator &VE,
BitstreamWriter &Stream) {
const std::vector<AttributeSet> &Attrs = VE.getAttributeSets();
if (Attrs.empty()) return;
Stream.EnterSubblock(bitc::PARAMATTR_GROUP_BLOCK_ID, 3);
SmallVector<uint64_t, 64> Record;
for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
AttributeSet AS = Attrs[i];
for (unsigned i = 0, e = AS.getNumSlots(); i != e; ++i) {
AttributeSet A = AS.getSlotAttributes(i);
Record.push_back(VE.getAttributeSetID(A));
Record.push_back(AS.getSlotIndex(i));
for (AttributeSet::iterator I = AS.begin(0), E = AS.end(0);
I != E; ++I) {
Attribute Attr = *I;
if (Attr.isEnumAttribute()) {
Record.push_back(0);
Record.push_back(Attr.getKindAsEnum());
} else if (Attr.isAlignAttribute()) {
Record.push_back(1);
Record.push_back(Attr.getKindAsEnum());
Record.push_back(Attr.getValueAsInt());
} else {
StringRef Kind = Attr.getKindAsString();
StringRef Val = Attr.getValueAsString();
Record.push_back(Val.empty() ? 3 : 4);
Record.append(Kind.begin(), Kind.end());
Record.push_back(0);
if (!Val.empty()) {
Record.append(Val.begin(), Val.end());
Record.push_back(0);
}
}
}
Stream.EmitRecord(bitc::PARAMATTR_GRP_CODE_ENTRY, Record);
Record.clear();
}
}
Stream.ExitBlock();
}
static void WriteAttributeTable(const ValueEnumerator &VE,
BitstreamWriter &Stream) {
const std::vector<AttributeSet> &Attrs = VE.getAttributes();
@ -192,6 +240,8 @@ static void WriteAttributeTable(const ValueEnumerator &VE,
Stream.EnterSubblock(bitc::PARAMATTR_BLOCK_ID, 3);
// FIXME: Remove this! It no longer works with the current attributes classes.
SmallVector<uint64_t, 64> Record;
for (unsigned i = 0, e = Attrs.size(); i != e; ++i) {
const AttributeSet &A = Attrs[i];
@ -1854,6 +1904,9 @@ static void WriteModule(const Module *M, BitstreamWriter &Stream) {
// Emit blockinfo, which defines the standard abbreviations etc.
WriteBlockInfo(VE, Stream);
// Emit information about attribute groups.
WriteAttributeGroupTable(VE, Stream);
// Emit information about parameter attributes.
WriteAttributeTable(VE, Stream);