diff options
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/TargetLoweringBase.cpp | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/TargetLoweringBase.cpp b/llvm/lib/CodeGen/TargetLoweringBase.cpp index 53f3b00789c..78492a6e881 100644 --- a/llvm/lib/CodeGen/TargetLoweringBase.cpp +++ b/llvm/lib/CodeGen/TargetLoweringBase.cpp @@ -38,6 +38,11 @@ #include <cctype> using namespace llvm; +static cl::opt<bool> JumpIsExpensiveOverride( + "jump-is-expensive", cl::init(false), + cl::desc("Do not create extra branches to split comparison logic."), + cl::Hidden); + /// InitLibcallNames - Set default libcall names. /// static void InitLibcallNames(const char **Names, const Triple &TT) { @@ -757,7 +762,7 @@ TargetLoweringBase::TargetLoweringBase(const TargetMachine &tm) : TM(tm) { IntDivIsCheap = false; FsqrtIsCheap = false; Pow2SDivIsCheap = false; - JumpIsExpensive = false; + JumpIsExpensive = JumpIsExpensiveOverride; PredictableSelectIsExpensive = false; MaskAndBranchFoldingIsLegal = false; EnableExtLdPromotion = false; @@ -915,6 +920,12 @@ bool TargetLoweringBase::canOpTrap(unsigned Op, EVT VT) const { } } +void TargetLoweringBase::setJumpIsExpensive(bool isExpensive) { + // If the command-line option was specified, ignore this request. + if (!JumpIsExpensiveOverride.getNumOccurrences()) + JumpIsExpensive = isExpensive; +} + TargetLoweringBase::LegalizeKind TargetLoweringBase::getTypeConversion(LLVMContext &Context, EVT VT) const { // If this is a simple type, use the ComputeRegisterProp mechanism. |
