From ceabd97423f8431f8215f180e21722fc3d221a35 Mon Sep 17 00:00:00 2001 From: Brian Gaeke Date: Thu, 20 May 2004 07:43:40 +0000 Subject: [PATCH] Fix a bug in outputting branches to constant PCs. Since the PC is supplied as 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 --- lib/Target/SparcV9/SparcV9CodeEmitter.cpp | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/lib/Target/SparcV9/SparcV9CodeEmitter.cpp b/lib/Target/SparcV9/SparcV9CodeEmitter.cpp index 6606d8d6460..4fc221325a8 100644 --- a/lib/Target/SparcV9/SparcV9CodeEmitter.cpp +++ b/lib/Target/SparcV9/SparcV9CodeEmitter.cpp @@ -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(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(V)) { // same as MO.isGlobalAddress() DEBUG(std::cerr << "GlobalValue: "); -- 2.34.1