clang/test/CodeGen/ppc64-align-struct.c

// RUN: %clang_cc1 -faltivec -triple powerpc64-unknown-linux-gnu -emit-llvm -o - %s | FileCheck %s

#include <stdarg.h>

struct test1 { int x; int y; };
struct test2 { int x; int y; } __attribute__((aligned (16)));
struct test3 { int x; int y; } __attribute__((aligned (32)));
struct test4 { int x; int y; int z; };

// CHECK: define void @test1(i32 signext %x, %struct.test1* byval align 8 %y)
void test1 (int x, struct test1 y)
{
}

// CHECK: define void @test2(i32 signext %x, %struct.test2* byval align 16 %y)
void test2 (int x, struct test2 y)
{
}

// This case requires run-time realignment of the incoming struct
// CHECK: define void @test3(i32 signext %x, %struct.test3* byval align 16)
// CHECK: %y = alloca %struct.test3, align 32
// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
void test3 (int x, struct test3 y)
{
}

// CHECK: define void @test4(i32 signext %x, %struct.test4* byval align 8 %y)
void test4 (int x, struct test4 y)
{
}

// CHECK: define void @test1va(%struct.test1* noalias sret %agg.result, i32 signext %x, ...)
// CHECK: %ap.cur = load i8** %ap
// CHECK: %ap.next = getelementptr i8* %ap.cur, i64 8
// CHECK: store i8* %ap.next, i8** %ap
// CHECK: bitcast i8* %ap.cur to %struct.test1*
struct test1 test1va (int x, ...)
{
  struct test1 y;
  va_list ap;
  va_start(ap, x);
  y = va_arg (ap, struct test1);
  va_end(ap);
  return y;
}

// CHECK: define void @test2va(%struct.test2* noalias sret %agg.result, i32 signext %x, ...)
// CHECK: %ap.cur = load i8** %ap
// CHECK: %[[TMP0:[0-9]+]] = ptrtoint i8* %ap.cur to i64
// CHECK: %[[TMP1:[0-9]+]] = add i64 %[[TMP0]], 15
// CHECK: %[[TMP2:[0-9]+]] = and i64 %[[TMP1]], -16
// CHECK: %ap.align = inttoptr i64 %[[TMP2]] to i8*
// CHECK: %ap.next = getelementptr i8* %ap.align, i64 16
// CHECK: store i8* %ap.next, i8** %ap
// CHECK: bitcast i8* %ap.align to %struct.test2*
struct test2 test2va (int x, ...)
{
  struct test2 y;
  va_list ap;
  va_start(ap, x);
  y = va_arg (ap, struct test2);
  va_end(ap);
  return y;
}

// CHECK: define void @test3va(%struct.test3* noalias sret %agg.result, i32 signext %x, ...)
// CHECK: %ap.cur = load i8** %ap
// CHECK: %[[TMP0:[0-9]+]] = ptrtoint i8* %ap.cur to i64
// CHECK: %[[TMP1:[0-9]+]] = add i64 %[[TMP0]], 15
// CHECK: %[[TMP2:[0-9]+]] = and i64 %[[TMP1]], -16
// CHECK: %ap.align = inttoptr i64 %[[TMP2]] to i8*
// CHECK: %ap.next = getelementptr i8* %ap.align, i64 32
// CHECK: store i8* %ap.next, i8** %ap
// CHECK: bitcast i8* %ap.align to %struct.test3*
struct test3 test3va (int x, ...)
{
  struct test3 y;
  va_list ap;
  va_start(ap, x);
  y = va_arg (ap, struct test3);
  va_end(ap);
  return y;
}

// CHECK: define void @test4va(%struct.test4* noalias sret %agg.result, i32 signext %x, ...)
// CHECK: %ap.cur = load i8** %ap
// CHECK: %ap.next = getelementptr i8* %ap.cur, i64 16
// CHECK: store i8* %ap.next, i8** %ap
// CHECK: bitcast i8* %ap.cur to %struct.test4*
struct test4 test4va (int x, ...)
{
  struct test4 y;
  va_list ap;
  va_start(ap, x);
  y = va_arg (ap, struct test4);
  va_end(ap);
  return y;
}

// CHECK: define void @testva_longdouble(%struct.test_longdouble* noalias sret %agg.result, i32 signext %x, ...)
// CHECK: %ap.cur = load i8** %ap
// CHECK: %ap.next = getelementptr i8* %ap.cur, i64 16
// CHECK: store i8* %ap.next, i8** %ap
// CHECK: bitcast i8* %ap.cur to %struct.test_longdouble*
struct test_longdouble { long double x; };
struct test_longdouble testva_longdouble (int x, ...)
{
  struct test_longdouble y;
  va_list ap;
  va_start(ap, x);
  y = va_arg (ap, struct test_longdouble);
  va_end(ap);
  return y;
}

// CHECK: define void @testva_vector(%struct.test_vector* noalias sret %agg.result, i32 signext %x, ...)
// CHECK: %ap.cur = load i8** %ap
// CHECK: %[[TMP0:[0-9]+]] = ptrtoint i8* %ap.cur to i64
// CHECK: %[[TMP1:[0-9]+]] = add i64 %[[TMP0]], 15
// CHECK: %[[TMP2:[0-9]+]] = and i64 %[[TMP1]], -16
// CHECK: %ap.align = inttoptr i64 %[[TMP2]] to i8*
// CHECK: %ap.next = getelementptr i8* %ap.align, i64 16
// CHECK: store i8* %ap.next, i8** %ap
// CHECK: bitcast i8* %ap.align to %struct.test_vector*
struct test_vector { vector int x; };
struct test_vector testva_vector (int x, ...)
{
  struct test_vector y;
  va_list ap;
  va_start(ap, x);
  y = va_arg (ap, struct test_vector);
  va_end(ap);
  return y;
}