6502/llvm-6502
1
0
Fork 0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-14 11:32:34 +00:00
Code Issues Projects Releases Wiki Activity

add an option to generate completely non-pic code, corresponding to what

Browse Source 
gcc -static produces on PPC.  This is used for building kexts and other things.

With this, materializing the address of a global looks like:

        lis r2, ha16(L_H$non_lazy_ptr)
        la r3, lo16(L_H$non_lazy_ptr)(r2)

we're still emitting stubs for functions, which is wrong.  That is next.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24399 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-11-17 18:55:48 +00:00
parent 1df747867c
commit 1d05cb47a9
3 changed files with 17 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
lib/Target/PowerPC/PPC.h
View File

@ -33,6 +33,7 @@ FunctionPass *createDarwinAsmPrinter(std::ostream &OS, TargetMachine &TM);
FunctionPass *createAIXAsmPrinter(std::ostream &OS, TargetMachine &TM);
extern bool PICEnabled;
extern bool PPCGenerateStaticCode;
extern PPCTargetEnum PPCTarget;
} // end namespace llvm;

12
lib/Target/PowerPC/PPCISelLowering.cpp
View File

@ -333,12 +333,20 @@ SDOperand PPCTargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) {
return DAG.getNode(ISD::BUILD_PAIR, MVT::i64, OutLo, OutHi);
}
case ISD::GlobalAddress: {
// Only lower GlobalAddress on Darwin.
if (!getTargetMachine().getSubtarget<PPCSubtarget>().isDarwin()) break;
GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
SDOperand GA = DAG.getTargetGlobalAddress(GV, MVT::i32);
SDOperand Zero = DAG.getConstant(0, MVT::i32);
if (PPCGenerateStaticCode) {
// Generate non-pic code that has direct accesses to globals. To do this
// the address of the global is just (hi(&g)+lo(&g)).
SDOperand Hi = DAG.getNode(PPCISD::Hi, MVT::i32, GA, Zero);
SDOperand Lo = DAG.getNode(PPCISD::Lo, MVT::i32, GA, Zero);
return DAG.getNode(ISD::ADD, MVT::i32, Hi, Lo);
}
// Only lower GlobalAddress on Darwin.
if (!getTargetMachine().getSubtarget<PPCSubtarget>().isDarwin()) break;
SDOperand Hi = DAG.getNode(PPCISD::Hi, MVT::i32, GA, Zero);
if (PICEnabled) {
// With PIC, the first instruction is actually "GR+hi(&G)".

6
lib/Target/PowerPC/PPCSubtarget.cpp
View File

@ -19,6 +19,7 @@
using namespace llvm;
PPCTargetEnum llvm::PPCTarget = TargetDefault;
bool llvm::PPCGenerateStaticCode = false;
namespace llvm {
cl::opt<PPCTargetEnum, true>
@ -29,6 +30,11 @@ namespace llvm {
" Enable Darwin codegen"),
clEnumValEnd),
cl::location(PPCTarget), cl::init(TargetDefault));
cl::opt<bool, true>
PPCStaticCode("ppc-static",
cl::desc("PowerPC: generate completely non-pic code"),
cl::location(PPCGenerateStaticCode));
}
#if defined(__APPLE__)