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Fix a bug in outputting branches to constant PCs. Since the PC is supplied as

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a full 64-bit address, it must be adjusted to fit in the branch instruction's
immediate field. (This is only used in the reoptimizer, for now.)


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@13608 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Brian Gaeke 2004-05-20 07:43:40 +00:00
parent a900452d37
commit ceabd97423
1 changed files with 3 additions and 2 deletions
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5
lib/Target/SparcV9/SparcV9CodeEmitter.cpp
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@ -597,8 +597,9 @@ int64_t SparcV9CodeEmitter::getMachineOpValue(MachineInstr &MI,
unsigned* CurrPC = (unsigned*)(intptr_t)MCE.getCurrentPCValue();
BBRefs.push_back(std::make_pair(BB, std::make_pair(CurrPC, &MI)));
} else if (const ConstantInt *CI = dyn_cast<ConstantInt>(V)) {
// Make constant PC-relative by subtracting the PC from it.
rv = CI->getRawValue() - MCE.getCurrentPCValue();
// The real target of the branch is CI = PC + (rv * 4)
// So undo that: give the instruction (CI - PC) / 4
rv = (CI->getRawValue() - MCE.getCurrentPCValue()) / 4;
} else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) {
// same as MO.isGlobalAddress()
DEBUG(std::cerr << "GlobalValue: ");