diff options
Diffstat (limited to 'lib/Target/PowerPC/PPCCTRLoops.cpp')
-rw-r--r-- | lib/Target/PowerPC/PPCCTRLoops.cpp | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/lib/Target/PowerPC/PPCCTRLoops.cpp b/lib/Target/PowerPC/PPCCTRLoops.cpp index 5d001fc072..e8760dedea 100644 --- a/lib/Target/PowerPC/PPCCTRLoops.cpp +++ b/lib/Target/PowerPC/PPCCTRLoops.cpp @@ -33,6 +33,7 @@ #include "llvm/Analysis/ScalarEvolutionExpander.h" #include "llvm/IR/Constants.h" #include "llvm/IR/DerivedTypes.h" +#include "llvm/IR/InlineAsm.h" #include "llvm/IR/Instructions.h" #include "llvm/IR/IntrinsicInst.h" #include "llvm/IR/Module.h" @@ -148,6 +149,20 @@ bool PPCCTRLoops::mightUseCTR(const Triple &TT, BasicBlock *BB) { for (BasicBlock::iterator J = BB->begin(), JE = BB->end(); J != JE; ++J) { if (CallInst *CI = dyn_cast<CallInst>(J)) { + if (InlineAsm *IA = dyn_cast<InlineAsm>(CI->getCalledValue())) { + // Inline ASM is okay, unless it clobbers the ctr register. + InlineAsm::ConstraintInfoVector CIV = IA->ParseConstraints(); + for (unsigned i = 0, ie = CIV.size(); i < ie; ++i) { + InlineAsm::ConstraintInfo &C = CIV[i]; + if (C.Type != InlineAsm::isInput) + for (unsigned j = 0, je = C.Codes.size(); j < je; ++j) + if (StringRef(C.Codes[j]).equals_lower("{ctr}")) + return true; + } + + continue; + } + if (!TM) return true; const TargetLowering *TLI = TM->getTargetLowering(); |