diff options
| -rw-r--r-- | include/llvm/Target/TargetLowering.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/llvm/Target/TargetLowering.h b/include/llvm/Target/TargetLowering.h index f596ea93ab..2a99962a2f 100644 --- a/include/llvm/Target/TargetLowering.h +++ b/include/llvm/Target/TargetLowering.h @@ -70,6 +70,11 @@ public: ZeroOrNegativeOneSetCCResult, // SetCC returns a sign extended result. }; + enum SchedPreference { + SchedulingForLatency, // Scheduling for shortest total latency. + SchedulingForRegPressure, // Scheduling for lowest register pressure. + }; + TargetLowering(TargetMachine &TM); virtual ~TargetLowering(); @@ -102,6 +107,11 @@ public: /// result register. SetCCResultValue getSetCCResultContents() const { return SetCCResultContents;} + /// getSchedulingPreference - Return target scheduling preference. + SchedPreference getSchedulingPreference() const { + return SchedPreferenceInfo; + } + /// getRegClassFor - Return the register class that should be used for the /// specified value type. This may only be called on legal types. TargetRegisterClass *getRegClassFor(MVT::ValueType VT) const { @@ -261,6 +271,11 @@ protected: /// setcc operation in a register. void setSetCCResultContents(SetCCResultValue Ty) { SetCCResultContents = Ty; } + /// setSchedulingPreference - Specify the target scheduling preference. + void setSchedulingPreference(SchedPreference Pref) { + SchedPreferenceInfo = Pref; + } + /// setShiftAmountFlavor - Describe how the target handles out of range shift /// amounts. void setShiftAmountFlavor(OutOfRangeShiftAmount OORSA) { @@ -453,6 +468,10 @@ private: /// SetCCResultContents - Information about the contents of the high-bits in /// the result of a setcc comparison operation. SetCCResultValue SetCCResultContents; + + /// SchedPreferenceInfo - The target scheduling preference: shortest possible + /// total cycles or lowest register usage. + SchedPreference SchedPreferenceInfo; /// UseUnderscoreSetJmpLongJmp - This target prefers to use _setjmp and /// _longjmp to implement llvm.setjmp/llvm.longjmp. Defaults to false. |