================
@@ -942,6 +942,36 @@ struct Amdgpu final : public VariadicABIInfo {
}
};
+struct NVPTX final : public VariadicABIInfo {
+
+ bool enableForTarget() override { return true; }
+
+ bool vaListPassedInSSARegister() override { return true; }
+
+ Type *vaListType(LLVMContext &Ctx) override {
+ return PointerType::getUnqual(Ctx);
+ }
+
+ Type *vaListParameterType(Module &M) override {
+ return PointerType::getUnqual(M.getContext());
+ }
+
+ Value *initializeVaList(Module &M, LLVMContext &Ctx, IRBuilder<> &Builder,
+ AllocaInst *, Value *Buffer) override {
+ return Builder.CreateAddrSpaceCast(Buffer, vaListParameterType(M));
+ }
+
+ VAArgSlotInfo slotInfo(const DataLayout &DL, Type *Parameter) override {
+ // NVPTX expects natural alignment in all cases. The variadic call ABI will
+ // handle promoting types to their appropriate size and alignment.
+ const unsigned MinAlign = 1;
+ Align A = DL.getABITypeAlign(Parameter);
+ if (A < MinAlign)
+ A = Align(MinAlign);
+ return {A, false};
+ }
----------------
JonChesterfield wrote:
Are you really looking for `if (A < 1) A = 1;` here? Align has max/min
functions which would be clearer
https://github.com/llvm/llvm-project/pull/96369
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