llvm/clang/test/CodeGen/transparent-union-type.c

// RUN: %clang_cc1 -triple powerpc64le-linux -O2 -target-cpu pwr7 -emit-llvm \
// RUN:   -fshort-enums %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-64
// RUN: %clang_cc1 -triple powerpc64-linux -O2 -target-cpu pwr7 -emit-llvm \
// RUN:   -fshort-enums %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-64
// RUN: %clang_cc1 -triple powerpc-linux -O2 -target-cpu pwr7 -emit-llvm \
// RUN:   -fshort-enums %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-32
// RUN: %clang_cc1 -triple powerpc64-aix -O2 -target-cpu pwr7 -emit-llvm \
// RUN:   -fshort-enums %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-64
// RUN: %clang_cc1 -triple powerpc-aix -O2 -target-cpu pwr7 -emit-llvm \
// RUN:   -fshort-enums %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-32
// RUN: %clang_cc1 -triple riscv64-linux -O2 -emit-llvm -fshort-enums \
// RUN:   %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-64
// RUN: %clang_cc1 -triple riscv32-linux -O2 -emit-llvm -fshort-enums \
// RUN:   %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-32
// RUN: %clang_cc1 -triple i386-linux -O2 -emit-llvm -fshort-enums \
// RUN:   %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-32
// RUN: %clang_cc1 -triple x86_64-linux -O2 -emit-llvm -fshort-enums \
// RUN:   %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-64
// RUN: %clang_cc1 -triple armv7-linux -O2 -emit-llvm -fshort-enums \
// RUN:   %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-32
// RUN: %clang_cc1 -triple arm64 -target-abi darwinpcs -O2 -emit-llvm \
// RUN:   -fshort-enums %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-64
// RUN: %clang_cc1 -triple aarch64 -target-abi darwinpcs -O2 -emit-llvm \
// RUN:   -fshort-enums %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-64

typedef union tu_c {
  signed char a;
  signed char b;
} tu_c_t __attribute__((transparent_union));

typedef union tu_s {
  short a;
} tu_s_t __attribute__((transparent_union));

typedef union tu_us {
  unsigned short a;
} tu_us_t __attribute__((transparent_union));

typedef union tu_l {
  long a;
} tu_l_t __attribute__((transparent_union));

// CHECK-LABEL: define{{.*}} void @ftest0(
// CHECK-SAME: i8 noundef signext [[UC_COERCE:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    ret void
void ftest0(tu_c_t uc) { }

// CHECK-LABEL: define{{.*}} void @ftest1(
// CHECK-SAME: i16 noundef signext [[UC_COERCE:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    ret void
void ftest1(tu_s_t uc) { }

// CHECK-LABEL: define{{.*}} void @ftest1b(
// CHECK-SAME: ptr nocapture noundef readnone [[UC:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    ret void
//
void ftest1b(tu_s_t *uc) { }

// CHECK-LABEL: define{{.*}} void @ftest2(
// CHECK-SAME: i16 noundef zeroext [[UC_COERCE:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    ret void
void ftest2(tu_us_t uc) { }

// CHECK-64-LABEL: define{{.*}} void @ftest3(
// CHECK-64-SAME: i64 [[UC_COERCE:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-64-NEXT:  [[ENTRY:.*:]]
// CHECK-64-NEXT:    ret void
//
// CHECK-32-LABEL: define{{.*}} void @ftest3(
// CHECK-32-SAME: i32 [[UC_COERCE:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-32-NEXT:  [[ENTRY:.*:]]
// CHECK-32-NEXT:    ret void
void ftest3(tu_l_t uc) { }

typedef union etest {
  enum flag {red, yellow, blue} fl;
  enum weekend {sun, sat} b;
} etest_t __attribute__((transparent_union));

// CHECK-LABEL: define{{.*}} void @ftest4(
// CHECK-SAME: i8 noundef zeroext [[A_COERCE:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    ret void
void ftest4(etest_t a) {}

typedef union tu_ptr {
  signed char *a;
  unsigned short *b;
  int *c;
} tu_ptr_t __attribute__((transparent_union));

// CHECK-LABEL: define{{.*}} void @ftest5(
// CHECK-SAME: ptr nocapture readnone [[UC_COERCE:%.*]]) local_unnamed_addr #[[ATTR0:[0-9]+]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    ret void
//
void ftest5(tu_ptr_t uc) { }

// CHECK-LABEL: define{{.*}} void @ftest6(
// CHECK-SAME: ptr nocapture noundef readnone [[UC:%.*]]) local_unnamed_addr #[[ATTR0]] {
// CHECK-NEXT:  [[ENTRY:.*:]]
// CHECK-NEXT:    ret void
//
void ftest6(tu_ptr_t *uc) { }