createMachineFunctionInfo(BumpPtrAllocator &Allocator, const Function &F,
const TargetSubtargetInfo *STI) const override;
+ bool isNoopAddrSpaceCast(unsigned SrcAs, unsigned DestAs) const override {
+ // While AVR has different address spaces, they are all represented by
+ // 16-bit pointers that can be freely casted between (of course, a pointer
+ // must be cast back to its original address space to be dereferenceable).
+ // To be safe, also check the pointer size in case we implement __memx
+ // pointers.
+ return getPointerSize(SrcAs) == getPointerSize(DestAs);
+ }
+
private:
std::unique_ptr<TargetLoweringObjectFile> TLOF;
AVRSubtarget SubTarget;
--- /dev/null
+; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
+; RUN: llc < %s -mtriple=avr | FileCheck %s
+
+@global = external global i8
+@progmem = external addrspace(1) global i8
+
+declare void @func() addrspace(1)
+declare void @doCallback(ptr) addrspace(1)
+
+define ptr @casttodata(ptr addrspace(1) %funcptr) addrspace(1) {
+; CHECK-LABEL: casttodata:
+; CHECK: ; %bb.0:
+; CHECK-NEXT: ret
+ %result = addrspacecast ptr addrspace(1) %funcptr to ptr
+ ret ptr %result
+}
+
+define ptr addrspace(1) @casttofuncptr(ptr %data) addrspace(1) {
+; CHECK-LABEL: casttofuncptr:
+; CHECK: ; %bb.0:
+; CHECK-NEXT: ret
+ %result = addrspacecast ptr %data to ptr addrspace(1)
+ ret ptr addrspace(1) %result
+}
+
+define ptr addrspace(1) @castglobal() addrspace(1) {
+; CHECK-LABEL: castglobal:
+; CHECK: ; %bb.0:
+; CHECK-NEXT: ldi r24, lo8(global)
+; CHECK-NEXT: ldi r25, hi8(global)
+; CHECK-NEXT: ret
+ %result = addrspacecast ptr @global to ptr addrspace(1)
+ ret ptr addrspace(1) %result
+}
+
+define ptr @castprogmem() addrspace(1) {
+; CHECK-LABEL: castprogmem:
+; CHECK: ; %bb.0:
+; CHECK-NEXT: ldi r24, lo8(progmem)
+; CHECK-NEXT: ldi r25, hi8(progmem)
+; CHECK-NEXT: ret
+ %result = addrspacecast ptr addrspace(1) @progmem to ptr
+ ret ptr %result
+}
+
+define ptr @castfunc() addrspace(1) {
+; CHECK-LABEL: castfunc:
+; CHECK: ; %bb.0:
+; CHECK-NEXT: ldi r24, pm_lo8(func)
+; CHECK-NEXT: ldi r25, pm_hi8(func)
+; CHECK-NEXT: ret
+ %result = addrspacecast ptr addrspace(1) @func to ptr
+ ret ptr %result
+}
+
+define void @callCallback() addrspace(1) {
+; CHECK-LABEL: callCallback:
+; CHECK: ; %bb.0:
+; CHECK-NEXT: ldi r24, pm_lo8(func)
+; CHECK-NEXT: ldi r25, pm_hi8(func)
+; CHECK-NEXT: rcall doCallback
+; CHECK-NEXT: ret
+ call addrspace(1) void @doCallback(ptr addrspacecast (ptr addrspace(1) @func to ptr))
+ ret void
+}