src/llvm-project/clang/test/CodeGen/WebAssembly/wasm-varargs.c

// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py UTC_ARGS: --function-signature
// RUN: %clang_cc1 -triple wasm32-unknown-unknown -o - -emit-llvm %s | FileCheck %s

#include <stdarg.h>

// CHECK-LABEL: define {{[^@]+}}@test_i32
// CHECK-SAME: (ptr noundef [[FMT:%.*]], ...) #[[ATTR0:[0-9]+]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[FMT_ADDR:%.*]] = alloca ptr, align 4
// CHECK-NEXT:    [[VA:%.*]] = alloca ptr, align 4
// CHECK-NEXT:    [[V:%.*]] = alloca i32, align 4
// CHECK-NEXT:    store ptr [[FMT]], ptr [[FMT_ADDR]], align 4
// CHECK-NEXT:    call void @llvm.va_start(ptr [[VA]])
// CHECK-NEXT:    [[ARGP_CUR:%.*]] = load ptr, ptr [[VA]], align 4
// CHECK-NEXT:    [[ARGP_NEXT:%.*]] = getelementptr inbounds i8, ptr [[ARGP_CUR]], i32 4
// CHECK-NEXT:    store ptr [[ARGP_NEXT]], ptr [[VA]], align 4
// CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr [[ARGP_CUR]], align 4
// CHECK-NEXT:    store i32 [[TMP0]], ptr [[V]], align 4
// CHECK-NEXT:    call void @llvm.va_end(ptr [[VA]])
// CHECK-NEXT:    [[TMP1:%.*]] = load i32, ptr [[V]], align 4
// CHECK-NEXT:    ret i32 [[TMP1]]
//
int test_i32(char *fmt, ...) {
  va_list va;

  va_start(va, fmt);
  int v = va_arg(va, int);
  va_end(va);

  return v;
}


// CHECK-LABEL: define {{[^@]+}}@test_i64
// CHECK-SAME: (ptr noundef [[FMT:%.*]], ...) #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[FMT_ADDR:%.*]] = alloca ptr, align 4
// CHECK-NEXT:    [[VA:%.*]] = alloca ptr, align 4
// CHECK-NEXT:    [[V:%.*]] = alloca i64, align 8
// CHECK-NEXT:    store ptr [[FMT]], ptr [[FMT_ADDR]], align 4
// CHECK-NEXT:    call void @llvm.va_start(ptr [[VA]])
// CHECK-NEXT:    [[ARGP_CUR:%.*]] = load ptr, ptr [[VA]], align 4
// CHECK-NEXT:    [[TMP0:%.*]] = getelementptr inbounds i8, ptr [[ARGP_CUR]], i32 7
// CHECK-NEXT:    [[ARGP_CUR_ALIGNED:%.*]] = call ptr @llvm.ptrmask.p0.i32(ptr [[TMP0]], i32 -8)
// CHECK-NEXT:    [[ARGP_NEXT:%.*]] = getelementptr inbounds i8, ptr [[ARGP_CUR_ALIGNED]], i32 8
// CHECK-NEXT:    store ptr [[ARGP_NEXT]], ptr [[VA]], align 4
// CHECK-NEXT:    [[TMP1:%.*]] = load i64, ptr [[ARGP_CUR_ALIGNED]], align 8
// CHECK-NEXT:    store i64 [[TMP1]], ptr [[V]], align 8
// CHECK-NEXT:    call void @llvm.va_end(ptr [[VA]])
// CHECK-NEXT:    [[TMP2:%.*]] = load i64, ptr [[V]], align 8
// CHECK-NEXT:    ret i64 [[TMP2]]
//
long long test_i64(char *fmt, ...) {
  va_list va;

  va_start(va, fmt);
  long long v = va_arg(va, long long);
  va_end(va);

  return v;
}


struct S {
  int x;
  int y;
  int z;
};

// CHECK-LABEL: define {{[^@]+}}@test_struct
// CHECK-SAME: (ptr noalias sret([[STRUCT_S:%.*]]) align 4 [[AGG_RESULT:%.*]], ptr noundef [[FMT:%.*]], ...) #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[FMT_ADDR:%.*]] = alloca ptr, align 4
// CHECK-NEXT:    [[VA:%.*]] = alloca ptr, align 4
// CHECK-NEXT:    store ptr [[FMT]], ptr [[FMT_ADDR]], align 4
// CHECK-NEXT:    call void @llvm.va_start(ptr [[VA]])
// CHECK-NEXT:    [[ARGP_CUR:%.*]] = load ptr, ptr [[VA]], align 4
// CHECK-NEXT:    [[ARGP_NEXT:%.*]] = getelementptr inbounds i8, ptr [[ARGP_CUR]], i32 4
// CHECK-NEXT:    store ptr [[ARGP_NEXT]], ptr [[VA]], align 4
// CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[ARGP_CUR]], align 4
// CHECK-NEXT:    call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[AGG_RESULT]], ptr align 4 [[TMP0]], i32 12, i1 false)
// CHECK-NEXT:    call void @llvm.va_end(ptr [[VA]])
// CHECK-NEXT:    ret void
//
struct S test_struct(char *fmt, ...) {
  va_list va;

  va_start(va, fmt);
  struct S v = va_arg(va, struct S);
  va_end(va);

  return v;
}


struct Z {};

// CHECK-LABEL: define {{[^@]+}}@test_empty_struct
// CHECK-SAME: (ptr noalias sret([[STRUCT_S:%.*]]) align 4 [[AGG_RESULT:%.*]], ptr noundef [[FMT:%.*]], ...) #[[ATTR0]] {
// CHECK-NEXT:  entry:
// CHECK-NEXT:    [[FMT_ADDR:%.*]] = alloca ptr, align 4
// CHECK-NEXT:    [[VA:%.*]] = alloca ptr, align 4
// CHECK-NEXT:    [[U:%.*]] = alloca [[STRUCT_Z:%.*]], align 1
// CHECK-NEXT:    store ptr [[FMT]], ptr [[FMT_ADDR]], align 4
// CHECK-NEXT:    call void @llvm.va_start(ptr [[VA]])
// CHECK-NEXT:    [[ARGP_CUR:%.*]] = load ptr, ptr [[VA]], align 4
// CHECK-NEXT:    [[ARGP_NEXT:%.*]] = getelementptr inbounds i8, ptr [[ARGP_CUR]], i32 0
// CHECK-NEXT:    store ptr [[ARGP_NEXT]], ptr [[VA]], align 4
// CHECK-NEXT:    call void @llvm.memcpy.p0.p0.i32(ptr align 1 [[U]], ptr align 4 [[ARGP_CUR]], i32 0, i1 false)
// CHECK-NEXT:    [[ARGP_CUR1:%.*]] = load ptr, ptr [[VA]], align 4
// CHECK-NEXT:    [[ARGP_NEXT2:%.*]] = getelementptr inbounds i8, ptr [[ARGP_CUR1]], i32 4
// CHECK-NEXT:    store ptr [[ARGP_NEXT2]], ptr [[VA]], align 4
// CHECK-NEXT:    [[TMP0:%.*]] = load ptr, ptr [[ARGP_CUR1]], align 4
// CHECK-NEXT:    call void @llvm.memcpy.p0.p0.i32(ptr align 4 [[AGG_RESULT]], ptr align 4 [[TMP0]], i32 12, i1 false)
// CHECK-NEXT:    call void @llvm.va_end(ptr [[VA]])
// CHECK-NEXT:    ret void
//
struct S test_empty_struct(char *fmt, ...) {
  va_list va;

  va_start(va, fmt);
  struct Z u = va_arg(va, struct Z);
  struct S v = va_arg(va, struct S);
  va_end(va);

  return v;
}