clang/test/CodeGen/arm64-be-hfa-vararg.c

   1 // RUN:  %clang_cc1 -triple aarch64_be-linux-gnu -ffreestanding -emit-llvm -O0 -o - %s | FileCheck %s
   2
   3 #include <stdarg.h>
   4
   5 // A single member HFA must be aligned just like a non-HFA register argument.
   6 double callee(int a, ...) {
   7 // CHECK: [[REGPP:%.*]] = getelementptr inbounds nuw %struct.__va_list, ptr [[VA:%.*]], i32 0, i32 2
   8 // CHECK: [[REGP:%.*]] = load ptr, ptr [[REGPP]], align 8
   9 // CHECK: [[OFFSET0:%.*]] = getelementptr inbounds i8, ptr [[REGP]], i32 {{.*}}
  10 // CHECK: [[OFFSET1:%.*]] = getelementptr inbounds i8, ptr [[OFFSET0]], i64 8
  11
  12 // CHECK: [[MEMPP:%.*]] = getelementptr inbounds nuw %struct.__va_list, ptr [[VA:%.*]], i32 0, i32 0
  13 // CHECK: [[MEMP:%.*]] = load ptr, ptr [[MEMPP]], align 8
  14 // CHECK: [[NEXTP:%.*]] = getelementptr inbounds i8, ptr [[MEMP]], i64 8
  15 // CHECK: store ptr [[NEXTP]], ptr [[MEMPP]], align 8
  16   va_list vl;
  17   va_start(vl, a);
  18   double result = va_arg(vl, struct { double a; }).a;
  19   va_end(vl);
  20   return result;
  21 }