+ ParseSubtargetFeatures(CPUName, FS);
+
+ // Popc is a v9-only instruction.
+ if (!IsV9)
+ UsePopc = false;
+
+ return *this;
+}
+
+SparcSubtarget::SparcSubtarget(const Triple &TT, const std::string &CPU,
+ const std::string &FS, TargetMachine &TM,
+ bool is64Bit)
+ : SparcGenSubtargetInfo(TT, CPU, FS), Is64Bit(is64Bit),
+ InstrInfo(initializeSubtargetDependencies(CPU, FS)), TLInfo(TM, *this),
+ FrameLowering(*this) {}
+
+int SparcSubtarget::getAdjustedFrameSize(int frameSize) const {
+
+ if (is64Bit()) {
+ // All 64-bit stack frames must be 16-byte aligned, and must reserve space
+ // for spilling the 16 window registers at %sp+BIAS..%sp+BIAS+128.
+ frameSize += 128;
+ // Frames with calls must also reserve space for 6 outgoing arguments
+ // whether they are used or not. LowerCall_64 takes care of that.
+ assert(frameSize % 16 == 0 && "Stack size not 16-byte aligned");
+ } else {
+ // Emit the correct save instruction based on the number of bytes in
+ // the frame. Minimum stack frame size according to V8 ABI is:
+ // 16 words for register window spill
+ // 1 word for address of returned aggregate-value
+ // + 6 words for passing parameters on the stack
+ // ----------
+ // 23 words * 4 bytes per word = 92 bytes
+ frameSize += 92;