File: arm64-be-hfa-vararg.c

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.8-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,388 kB
  • sloc: cpp: 7,438,767; ansic: 1,393,871; asm: 1,012,926; python: 241,728; f90: 86,635; objc: 75,411; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (21 lines) | stat: -rw-r--r-- 954 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
// RUN:  %clang_cc1 -triple aarch64_be-linux-gnu -ffreestanding -emit-llvm -O0 -o - %s | FileCheck %s

#include <stdarg.h>

// A single member HFA must be aligned just like a non-HFA register argument.
double callee(int a, ...) {
// CHECK: [[REGPP:%.*]] = getelementptr inbounds nuw %struct.__va_list, ptr [[VA:%.*]], i32 0, i32 2
// CHECK: [[REGP:%.*]] = load ptr, ptr [[REGPP]], align 8
// CHECK: [[OFFSET0:%.*]] = getelementptr inbounds i8, ptr [[REGP]], i32 {{.*}}
// CHECK: [[OFFSET1:%.*]] = getelementptr inbounds i8, ptr [[OFFSET0]], i64 8

// CHECK: [[MEMPP:%.*]] = getelementptr inbounds nuw %struct.__va_list, ptr [[VA:%.*]], i32 0, i32 0
// CHECK: [[MEMP:%.*]] = load ptr, ptr [[MEMPP]], align 8
// CHECK: [[NEXTP:%.*]] = getelementptr inbounds i8, ptr [[MEMP]], i64 8
// CHECK: store ptr [[NEXTP]], ptr [[MEMPP]], align 8
  va_list vl;
  va_start(vl, a);
  double result = va_arg(vl, struct { double a; }).a;
  va_end(vl);
  return result;
}