[llvm-commits] CVS: llvm/lib/Bytecode/Reader/Reader.cpp
Chris Lattner
lattner at cs.uiuc.edu
Fri Nov 11 17:33:52 PST 2005
Changes in directory llvm/lib/Bytecode/Reader:
Reader.cpp updated: 1.173 -> 1.174
---
Log message:
Read and write section info from/to .bc files
---
Diffs of the changes: (+42 -10)
Reader.cpp | 52 ++++++++++++++++++++++++++++++++++++++++++----------
1 files changed, 42 insertions(+), 10 deletions(-)
Index: llvm/lib/Bytecode/Reader/Reader.cpp
diff -u llvm/lib/Bytecode/Reader/Reader.cpp:1.173 llvm/lib/Bytecode/Reader/Reader.cpp:1.174
--- llvm/lib/Bytecode/Reader/Reader.cpp:1.173 Sun Nov 6 02:23:17 2005
+++ llvm/lib/Bytecode/Reader/Reader.cpp Fri Nov 11 19:33:40 2005
@@ -1891,6 +1891,10 @@
if (Handler) Handler->handleModuleGlobalsBegin();
+ // SectionID - If a global has an explicit section specified, this map
+ // remembers the ID until we can translate it into a string.
+ std::map<GlobalValue*, unsigned> SectionID;
+
// Read global variables...
unsigned VarType = read_vbr_uint();
while (VarType != Type::VoidTyID) { // List is terminated by Void
@@ -1903,6 +1907,7 @@
bool isConstant = VarType & 1;
bool hasInitializer = (VarType & 2) != 0;
unsigned Alignment = 0;
+ unsigned GlobalSectionID = 0;
// An extension word is present when linkage = 3 (internal) and hasinit = 0.
if (LinkageID == 3 && !hasInitializer) {
@@ -1912,6 +1917,9 @@
hasInitializer = ExtWord & 1;
LinkageID = (ExtWord >> 1) & 7;
Alignment = (1 << ((ExtWord >> 4) & 31)) >> 1;
+
+ if (ExtWord & (1 << 9)) // Has a section ID.
+ GlobalSectionID = read_vbr_uint();
}
GlobalValue::LinkageTypes Linkage;
@@ -1942,6 +1950,9 @@
GV->setAlignment(Alignment);
insertValue(GV, SlotNo, ModuleValues);
+ if (GlobalSectionID != 0)
+ SectionID[GV] = GlobalSectionID;
+
unsigned initSlot = 0;
if (hasInitializer) {
initSlot = read_vbr_uint();
@@ -1975,9 +1986,8 @@
const FunctionType* FTy =
cast<FunctionType>(cast<PointerType>(Ty)->getElementType());
-
// Insert the place holder.
- Function* Func = new Function(FTy, GlobalValue::ExternalLinkage,
+ Function *Func = new Function(FTy, GlobalValue::ExternalLinkage,
"", TheModule);
insertValue(Func, (FnSignature & (~0U >> 1)) >> 5, ModuleValues);
@@ -1997,6 +2007,9 @@
unsigned ExtWord = read_vbr_uint();
Alignment = (1 << (ExtWord & 31)) >> 1;
CC |= ((ExtWord >> 5) & 15) << 4;
+
+ if (ExtWord & (1 << 10)) // Has a section ID.
+ SectionID[Func] = read_vbr_uint();
}
Func->setCallingConv(CC-1);
@@ -2014,28 +2027,47 @@
// remove elements efficiently from the back of the vector.
std::reverse(FunctionSignatureList.begin(), FunctionSignatureList.end());
- // If this bytecode format has dependent library information in it ..
- if (!hasNoDependentLibraries) {
- // Read in the number of dependent library items that follow
+ /// SectionNames - This contains the list of section names encoded in the
+ /// moduleinfoblock. Functions and globals with an explicit section index
+ /// into this to get their section name.
+ std::vector<std::string> SectionNames;
+
+ if (hasInconsistentModuleGlobalInfo) {
+ align32();
+ } else if (!hasNoDependentLibraries) {
+ // If this bytecode format has dependent library information in it, read in
+ // the number of dependent library items that follow.
unsigned num_dep_libs = read_vbr_uint();
std::string dep_lib;
- while( num_dep_libs-- ) {
+ while (num_dep_libs--) {
dep_lib = read_str();
TheModule->addLibrary(dep_lib);
if (Handler)
Handler->handleDependentLibrary(dep_lib);
}
-
- // Read target triple and place into the module
+ // Read target triple and place into the module.
std::string triple = read_str();
TheModule->setTargetTriple(triple);
if (Handler)
Handler->handleTargetTriple(triple);
+
+ if (At != BlockEnd) {
+ // If the file has section info in it, read the section names now.
+ unsigned NumSections = read_vbr_uint();
+ while (NumSections--)
+ SectionNames.push_back(read_str());
+ }
}
- if (hasInconsistentModuleGlobalInfo)
- align32();
+ // If any globals are in specified sections, assign them now.
+ for (std::map<GlobalValue*, unsigned>::iterator I = SectionID.begin(), E =
+ SectionID.end(); I != E; ++I)
+ if (I->second) {
+ if (I->second > SectionID.size())
+ error("SectionID out of range for global!");
+ I->first->setSection(SectionNames[I->second-1]);
+ }
// This is for future proofing... in the future extra fields may be added that
// we don't understand, so we transparently ignore them.
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