diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/FastISel.cpp')
-rw-r--r-- | lib/CodeGen/SelectionDAG/FastISel.cpp | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp index e5ea6e693f..635752ab65 100644 --- a/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -55,6 +55,7 @@ #include "llvm/Analysis/Loads.h" #include "llvm/Target/TargetData.h" #include "llvm/Target/TargetInstrInfo.h" +#include "llvm/Target/TargetLibraryInfo.h" #include "llvm/Target/TargetLowering.h" #include "llvm/Target/TargetMachine.h" #include "llvm/Support/ErrorHandling.h" @@ -789,6 +790,18 @@ FastISel::SelectInstruction(const Instruction *I) { MachineBasicBlock::iterator SavedInsertPt = FuncInfo.InsertPt; + // As a special case, don't even try to handle calls to builtin library + // functions so that calls to builtin functions get translated to + // instructions when supported by the target. + if (const CallInst *Call = dyn_cast<CallInst>(I)) { + const Function *F = Call->getCalledFunction(); + LibFunc::Func Func; + if (F && !F->hasLocalLinkage() && F->hasName() && + LibInfo->getLibFunc(F->getName(), Func) && + LibInfo->has(Func)) + return false; + } + // First, try doing target-independent selection. if (SelectOperator(I, I->getOpcode())) { ++NumFastIselSuccessIndependent; @@ -1040,7 +1053,8 @@ FastISel::SelectOperator(const User *I, unsigned Opcode) { } } -FastISel::FastISel(FunctionLoweringInfo &funcInfo) +FastISel::FastISel(FunctionLoweringInfo &funcInfo, + const TargetLibraryInfo *libInfo) : FuncInfo(funcInfo), MRI(FuncInfo.MF->getRegInfo()), MFI(*FuncInfo.MF->getFrameInfo()), @@ -1049,7 +1063,8 @@ FastISel::FastISel(FunctionLoweringInfo &funcInfo) TD(*TM.getTargetData()), TII(*TM.getInstrInfo()), TLI(*TM.getTargetLowering()), - TRI(*TM.getRegisterInfo()) { + TRI(*TM.getRegisterInfo()), + LibInfo(libInfo) { } FastISel::~FastISel() {} |