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Add IR support, ELF section and user documentation for partitioning feature.

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The partitioning feature was proposed here:
http://lists.llvm.org/pipermail/llvm-dev/2019-February/130583.html

This is mostly just documentation. The feature itself will be contributed
in subsequent patches.

Differential Revision: https://reviews.llvm.org/D60242

llvm-svn: 361923
This commit is contained in:
Peter Collingbourne
2019-05-29 03:29:01 +00:00
parent 10c548cdfa
commit 31fda09b2d
23 changed files with 470 additions and 8 deletions
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11
llvm/lib/Bitcode/Writer/BitcodeWriter.cpp
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@@ -1262,7 +1262,8 @@ void ModuleBitcodeWriter::writeModuleInfo() {
GV.getDLLStorageClass() != GlobalValue::DefaultStorageClass ||
GV.hasComdat() ||
GV.hasAttributes() ||
GV.isDSOLocal()) {
GV.isDSOLocal() ||
GV.hasPartition()) {
Vals.push_back(getEncodedVisibility(GV));
Vals.push_back(getEncodedThreadLocalMode(GV));
Vals.push_back(getEncodedUnnamedAddr(GV));
@@ -1274,6 +1275,8 @@ void ModuleBitcodeWriter::writeModuleInfo() {
Vals.push_back(VE.getAttributeListID(AL));
Vals.push_back(GV.isDSOLocal());
Vals.push_back(addToStrtab(GV.getPartition()));
Vals.push_back(GV.getPartition().size());
} else {
AbbrevToUse = SimpleGVarAbbrev;
}
@@ -1311,6 +1314,8 @@ void ModuleBitcodeWriter::writeModuleInfo() {
Vals.push_back(F.isDSOLocal());
Vals.push_back(F.getAddressSpace());
Vals.push_back(addToStrtab(F.getPartition()));
Vals.push_back(F.getPartition().size());
unsigned AbbrevToUse = 0;
Stream.EmitRecord(bitc::MODULE_CODE_FUNCTION, Vals, AbbrevToUse);
@@ -1333,6 +1338,8 @@ void ModuleBitcodeWriter::writeModuleInfo() {
Vals.push_back(getEncodedThreadLocalMode(A));
Vals.push_back(getEncodedUnnamedAddr(A));
Vals.push_back(A.isDSOLocal());
Vals.push_back(addToStrtab(A.getPartition()));
Vals.push_back(A.getPartition().size());
unsigned AbbrevToUse = 0;
Stream.EmitRecord(bitc::MODULE_CODE_ALIAS, Vals, AbbrevToUse);
@@ -1351,6 +1358,8 @@ void ModuleBitcodeWriter::writeModuleInfo() {
Vals.push_back(getEncodedLinkage(I));
Vals.push_back(getEncodedVisibility(I));
Vals.push_back(I.isDSOLocal());
Vals.push_back(addToStrtab(I.getPartition()));
Vals.push_back(I.getPartition().size());
Stream.EmitRecord(bitc::MODULE_CODE_IFUNC, Vals);
Vals.clear();
}