diff options
Diffstat (limited to 'contrib/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp')
| -rw-r--r-- | contrib/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/contrib/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp b/contrib/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp index baadf08..fd150be 100644 --- a/contrib/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp +++ b/contrib/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp @@ -197,10 +197,18 @@ static bool isLargeIntegerTy(bool Is32Bit, Type *Ty) { // Determining the address of a TLS variable results in a function call in // certain TLS models. static bool memAddrUsesCTR(const PPCTargetMachine *TM, - const llvm::Value *MemAddr) { + const Value *MemAddr) { const auto *GV = dyn_cast<GlobalValue>(MemAddr); - if (!GV) + if (!GV) { + // Recurse to check for constants that refer to TLS global variables. + if (const auto *CV = dyn_cast<Constant>(MemAddr)) + for (const auto &CO : CV->operands()) + if (memAddrUsesCTR(TM, CO)) + return true; + return false; + } + if (!GV->isThreadLocal()) return false; if (!TM) @@ -239,6 +247,11 @@ bool PPCCTRLoops::mightUseCTR(const Triple &TT, BasicBlock *BB) { if (F->getIntrinsicID() != Intrinsic::not_intrinsic) { switch (F->getIntrinsicID()) { default: continue; + // If we have a call to ppc_is_decremented_ctr_nonzero, or ppc_mtctr + // we're definitely using CTR. + case Intrinsic::ppc_is_decremented_ctr_nonzero: + case Intrinsic::ppc_mtctr: + return true; // VisualStudio defines setjmp as _setjmp #if defined(_MSC_VER) && defined(setjmp) && \ @@ -426,6 +439,7 @@ bool PPCCTRLoops::convertToCTRLoop(Loop *L) { // Process nested loops first. for (Loop::iterator I = L->begin(), E = L->end(); I != E; ++I) { MadeChange |= convertToCTRLoop(*I); + DEBUG(dbgs() << "Nested loop converted\n"); } // If a nested loop has been converted, then we can't convert this loop. |
