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| author | Misha Brukman <brukman+llvm@gmail.com> | 2004-06-28 18:20:59 +0000 |
|---|---|---|
| committer | Misha Brukman <brukman+llvm@gmail.com> | 2004-06-28 18:20:59 +0000 |
| commit | 7e5812cd174c9f29135dc1567aecf7fe3b6450ef (patch) | |
| tree | d0da0b847f6f73e59bd1aad4ef92a31d678f16f2 /lib/Target/PowerPC/PPC32ISelSimple.cpp | |
| parent | a6e58b3cfb4b5a9be2512bd4fb936a1cb2010924 (diff) | |
Fix loading and storing PC-relative static variables, courtesy of Nate Begeman.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14468 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPC32ISelSimple.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPC32ISelSimple.cpp | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp index 4302beb79b..6d7b585106 100644 --- a/lib/Target/PowerPC/PPC32ISelSimple.cpp +++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp @@ -365,10 +365,19 @@ unsigned ISel::getReg(Value *V, MachineBasicBlock *MBB, copyConstantToRegister(MBB, IPt, C, Reg); return Reg; } else if (GlobalValue *GV = dyn_cast<GlobalValue>(V)) { + // GV is located at PC + distance + unsigned LRsave = makeAnotherReg(Type::IntTy); + unsigned CurPC = makeAnotherReg(Type::IntTy); unsigned Reg1 = makeAnotherReg(V->getType()); unsigned Reg2 = makeAnotherReg(V->getType()); - // Move the address of the global into the register - BuildMI(*MBB, IPt, PPC32::LOADHiAddr, 2, Reg1).addReg(PPC32::R0) + // Save the old LR + BuildMI(*MBB, IPt, PPC32::MFLR, 0, LRsave); + // Move PC to destination reg + BuildMI(*MBB, IPt, PPC32::MovePCtoLR, 0, CurPC); + // Restore the old LR + BuildMI(*MBB, IPt, PPC32::MTLR, 1).addReg(LRsave); + // Move value at PC + distance into return reg + BuildMI(*MBB, IPt, PPC32::LOADHiAddr, 2, Reg1).addReg(CurPC) .addGlobalAddress(GV); BuildMI(*MBB, IPt, PPC32::LOADLoAddr, 2, Reg2).addReg(Reg1) .addGlobalAddress(GV); |