+ // If symbol visibility is hidden, the extra load is not needed if
+ // the symbol is definitely defined in the current translation unit.
+
+ // The handling of non-hidden symbols in PIC mode is rather target-dependent:
+ // + On MachO, if the symbol is defined in this module the GOT can be
+ // skipped.
+ // + On ELF, the R_AARCH64_COPY relocation means that even symbols actually
+ // defined could end up in unexpected places. Use a GOT.
+ if (TM.getRelocationModel() != Reloc::Static && GV->hasDefaultVisibility()) {
+ if (isTargetMachO())
+ return isDef ? AArch64II::MO_NO_FLAG : AArch64II::MO_GOT;
+ else
+ // No need to go through the GOT for local symbols on ELF.
+ return GV->hasLocalLinkage() ? AArch64II::MO_NO_FLAG : AArch64II::MO_GOT;
+ }
+
+ return AArch64II::MO_NO_FLAG;
+}
+
+/// This function returns the name of a function which has an interface
+/// like the non-standard bzero function, if such a function exists on
+/// the current subtarget and it is considered prefereable over
+/// memset with zero passed as the second argument. Otherwise it
+/// returns null.
+const char *AArch64Subtarget::getBZeroEntry() const {
+ // Prefer bzero on Darwin only.
+ if(isTargetDarwin())
+ return "bzero";
+
+ return nullptr;
+}
+
+void AArch64Subtarget::overrideSchedPolicy(MachineSchedPolicy &Policy,
+ MachineInstr *begin, MachineInstr *end,
+ unsigned NumRegionInstrs) const {
+ // LNT run (at least on Cyclone) showed reasonably significant gains for
+ // bi-directional scheduling. 253.perlbmk.
+ Policy.OnlyTopDown = false;
+ Policy.OnlyBottomUp = false;
+}
+
+bool AArch64Subtarget::enableEarlyIfConversion() const {
+ return EnableEarlyIfConvert;