1 ; RUN: llc < %s | FileCheck %s 2 3 ; Vararg saving must save Q registers using the equivalent of STR/STP. 4 5 target datalayout = "E-m:e-i64:64-i128:128-n32:64-S128" 6 target triple = "aarch64_be-arm-none-eabi" 7 8 %struct.__va_list = type { i8*, i8*, i8*, i32, i32 } 9 10 declare void @llvm.va_start(i8*) nounwind 11 declare void @llvm.va_end(i8*) nounwind 12 13 define double @callee(i32 %a, ...) { 14 ; CHECK: stp 15 ; CHECK: stp 16 ; CHECK: stp 17 ; CHECK: stp 18 ; CHECK: stp 19 ; CHECK: stp 20 entry: 21 %vl = alloca %struct.__va_list, align 8 22 %vl1 = bitcast %struct.__va_list* %vl to i8* 23 call void @llvm.va_start(i8* %vl1) 24 %vr_offs_p = getelementptr inbounds %struct.__va_list, %struct.__va_list* %vl, i64 0, i32 4 25 %vr_offs = load i32, i32* %vr_offs_p, align 4 26 %0 = icmp sgt i32 %vr_offs, -1 27 br i1 %0, label %vaarg.on_stack, label %vaarg.maybe_reg 28 29 vaarg.maybe_reg: ; preds = %entry 30 %new_reg_offs = add i32 %vr_offs, 16 31 store i32 %new_reg_offs, i32* %vr_offs_p, align 4 32 %inreg = icmp slt i32 %new_reg_offs, 1 33 br i1 %inreg, label %vaarg.in_reg, label %vaarg.on_stack 34 35 vaarg.in_reg: ; preds = %vaarg.maybe_reg 36 %reg_top_p = getelementptr inbounds %struct.__va_list, %struct.__va_list* %vl, i64 0, i32 2 37 %reg_top = load i8*, i8** %reg_top_p, align 8 38 %1 = sext i32 %vr_offs to i64 39 %2 = getelementptr i8, i8* %reg_top, i64 %1 40 %3 = ptrtoint i8* %2 to i64 41 %align_be = add i64 %3, 8 42 %4 = inttoptr i64 %align_be to i8* 43 br label %vaarg.end 44 45 vaarg.on_stack: ; preds = %vaarg.maybe_reg, %entry 46 %stack_p = getelementptr inbounds %struct.__va_list, %struct.__va_list* %vl, i64 0, i32 0 47 %stack = load i8*, i8** %stack_p, align 8 48 %new_stack = getelementptr i8, i8* %stack, i64 8 49 store i8* %new_stack, i8** %stack_p, align 8 50 br label %vaarg.end 51 52 vaarg.end: ; preds = %vaarg.on_stack, %vaarg.in_reg 53 %.sink = phi i8* [ %4, %vaarg.in_reg ], [ %stack, %vaarg.on_stack ] 54 %5 = bitcast i8* %.sink to double* 55 %6 = load double, double* %5, align 8 56 call void @llvm.va_end(i8* %vl1) 57 ret double %6 58 } 59
