[llvm-commits] CVS: llvm/lib/Bytecode/Writer/Writer.cpp
Anton Korobeynikov
asl at math.spbu.ru
Thu Sep 14 11:24:07 PDT 2006
Changes in directory llvm/lib/Bytecode/Writer:
Writer.cpp updated: 1.123 -> 1.124
---
Log message:
Adding dllimport, dllexport and external weak linkage types.
DLL* linkages got full (I hope) codegeneration support in C & both x86
assembler backends.
External weak linkage added for future use, we don't provide any
codegeneration, etc. support for it.
---
Diffs of the changes: (+26 -9)
Writer.cpp | 35 ++++++++++++++++++++++++++---------
1 files changed, 26 insertions(+), 9 deletions(-)
Index: llvm/lib/Bytecode/Writer/Writer.cpp
diff -u llvm/lib/Bytecode/Writer/Writer.cpp:1.123 llvm/lib/Bytecode/Writer/Writer.cpp:1.124
--- llvm/lib/Bytecode/Writer/Writer.cpp:1.123 Fri Jul 28 17:07:54 2006
+++ llvm/lib/Bytecode/Writer/Writer.cpp Thu Sep 14 13:23:26 2006
@@ -938,11 +938,14 @@
static unsigned getEncodedLinkage(const GlobalValue *GV) {
switch (GV->getLinkage()) {
default: assert(0 && "Invalid linkage!");
- case GlobalValue::ExternalLinkage: return 0;
- case GlobalValue::WeakLinkage: return 1;
- case GlobalValue::AppendingLinkage: return 2;
- case GlobalValue::InternalLinkage: return 3;
- case GlobalValue::LinkOnceLinkage: return 4;
+ case GlobalValue::ExternalLinkage: return 0;
+ case GlobalValue::WeakLinkage: return 1;
+ case GlobalValue::AppendingLinkage: return 2;
+ case GlobalValue::InternalLinkage: return 3;
+ case GlobalValue::LinkOnceLinkage: return 4;
+ case GlobalValue::DLLImportLinkage: return 5;
+ case GlobalValue::DLLExportLinkage: return 6;
+ case GlobalValue::ExternalWeakLinkage: return 7;
}
}
@@ -973,7 +976,7 @@
unsigned oSlot = ((unsigned)Slot << 5) | (getEncodedLinkage(I) << 2) |
(I->hasInitializer() << 1) | (unsigned)I->isConstant();
output_vbr(oSlot);
- } else {
+ } else {
unsigned oSlot = ((unsigned)Slot << 5) | (3 << 2) |
(0 << 1) | (unsigned)I->isConstant();
output_vbr(oSlot);
@@ -1018,16 +1021,30 @@
if (I->isExternal()) // If external, we don't have an FunctionInfo block.
ID |= 1 << 4;
- if (I->getAlignment() || I->hasSection() || (CC & ~15) != 0)
+ if (I->getAlignment() || I->hasSection() || (CC & ~15) != 0 ||
+ (I->isExternal() && I->hasDLLImportLinkage()) ||
+ (I->isExternal() && I->hasExternalWeakLinkage())
+ )
ID |= 1 << 31; // Do we need an extension word?
output_vbr(ID);
if (ID & (1 << 31)) {
// Extension byte: bits 0-4 = alignment, bits 5-9 = top nibble of calling
- // convention, bit 10 = hasSectionID.
+ // convention, bit 10 = hasSectionID., bits 11-12 = external linkage type
+ unsigned extLinkage = 0;
+
+ if (I->isExternal()) {
+ if (I->hasDLLImportLinkage()) {
+ extLinkage = 1;
+ } else if (I->hasExternalWeakLinkage()) {
+ extLinkage = 2;
+ }
+ }
+
ID = (Log2_32(I->getAlignment())+1) | ((CC >> 4) << 5) |
- (I->hasSection() << 10);
+ (I->hasSection() << 10) |
+ ((extLinkage & 3) << 11);
output_vbr(ID);
// Give section names unique ID's.
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