[AArch64] Add support for MTE intrinsics

This provides intrinsics support for Memory Tagging Extension (MTE),
which was introduced with the Armv8.5-a architecture.
These intrinsics are available when __ARM_FEATURE_MEMORY_TAGGING is defined.
Each intrinsic is described in detail in the ACLE Q1 2019 documentation:
https://developer.arm.com/docs/101028/latest
Reviewed By: Tim Nortover, David Spickett
Differential Revision: https://reviews.llvm.org/D60485



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@359348 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 136 insertions, 0 deletions

diff --git a/test/Sema/builtins-arm64-mte.c b/test/Sema/builtins-arm64-mte.c
new file mode 100644
index 0000000000..4f87eb000b
--- /dev/null
+++ b/test/Sema/builtins-arm64-mte.c
@@ -0,0 +1,136 @@
+// RUN: %clang_cc1 -triple arm64-arm-eabi %s -target-feature +mte -fsyntax-only -verify
+// RUN: %clang_cc1 -triple arm64-arm-eabi %s -target-feature +mte -x c++ -fsyntax-only -verify
+#include <stddef.h>
+#include <arm_acle.h>
+
+int  *create_tag1(int a, unsigned b) {
+  // expected-error@+1 {{first argument of MTE builtin function must be a pointer ('int' invalid)}}
+  return __arm_mte_create_random_tag(a,b);
+}
+
+int  *create_tag2(int *a, unsigned *b) {
+  // expected-error@+1 {{second argument of MTE builtin function must be an integer type ('unsigned int *' invalid)}}
+  return __arm_mte_create_random_tag(a,b);
+}
+
+int  *create_tag3(const int *a, unsigned b) {
+#ifdef __cplusplus
+  // expected-error@+1 {{cannot initialize return object of type 'int *' with an rvalue of type 'const int *'}}
+  return __arm_mte_create_random_tag(a,b);
+#else
+  // expected-warning@+1 {{returning 'const int *' from a function with result type 'int *' discards qualifiers}}
+  return __arm_mte_create_random_tag(a,b);
+#endif
+}
+
+int  *create_tag4(volatile int *a, unsigned b) {
+#ifdef __cplusplus
+  // expected-error@+1 {{cannot initialize return object of type 'int *' with an rvalue of type 'volatile int *'}}
+  return __arm_mte_create_random_tag(a,b);
+#else
+  // expected-warning@+1 {{returning 'volatile int *' from a function with result type 'int *' discards qualifiers}}
+  return __arm_mte_create_random_tag(a,b);
+#endif
+}
+
+int  *increment_tag1(int *a, unsigned b) {
+  // expected-error@+1 {{argument to '__builtin_arm_addg' must be a constant integer}}
+  return __arm_mte_increment_tag(a,b);
+}
+
+int  *increment_tag2(int *a) {
+  // expected-error@+1 {{argument value 16 is outside the valid range [0, 15]}}
+  return __arm_mte_increment_tag(a,16);
+}
+
+int  *increment_tag3(int *a) {
+  // expected-error@+1 {{argument value -1 is outside the valid range [0, 15]}}
+  return __arm_mte_increment_tag(a,-1);
+}
+
+int  *increment_tag4(const int *a) {
+#ifdef __cplusplus
+  // expected-error@+1 {{cannot initialize return object of type 'int *' with an rvalue of type 'const int *'}}
+  return __arm_mte_increment_tag(a,5);
+#else
+  // expected-warning@+1 {{returning 'const int *' from a function with result type 'int *' discards qualifiers}}
+  return __arm_mte_increment_tag(a,5);
+#endif
+}
+
+int *increment_tag5(const volatile int *a) {
+#ifdef __cplusplus
+  // expected-error@+1 {{cannot initialize return object of type 'int *' with an rvalue of type 'const volatile int *'}}
+  return __arm_mte_increment_tag(a,5);
+#else
+  // expected-warning@+1 {{returning 'const volatile int *' from a function with result type 'int *' discards qualifiers}}
+  return __arm_mte_increment_tag(a,5);
+#endif
+}
+
+unsigned exclude_tag1(int *ptr, unsigned m) {
+   // expected-error@+1 {{first argument of MTE builtin function must be a pointer ('int' invalid)}}
+   return  __arm_mte_exclude_tag(*ptr, m);
+}
+
+unsigned exclude_tag2(int *ptr, int *m) {
+   // expected-error@+1 {{second argument of MTE builtin function must be an integer type ('int *' invalid)}}
+   return  __arm_mte_exclude_tag(ptr, m);
+}
+
+void get_tag1() {
+   // expected-error@+1 {{too few arguments to function call, expected 1, have 0}}
+   __arm_mte_get_tag();
+}
+
+int *get_tag2(int ptr) {
+   // expected-error@+1 {{first argument of MTE builtin function must be a pointer ('int' invalid)}}
+   return __arm_mte_get_tag(ptr);
+}
+
+int *get_tag3(const volatile int *ptr) {
+#ifdef __cplusplus
+  // expected-error@+1 {{cannot initialize return object of type 'int *' with an rvalue of type 'const volatile int *'}}
+  return __arm_mte_get_tag(ptr);
+#else
+  // expected-warning@+1 {{returning 'const volatile int *' from a function with result type 'int *' discards qualifiers}}
+  return __arm_mte_get_tag(ptr);
+#endif
+}
+
+void set_tag1() {
+   // expected-error@+1 {{too few arguments to function call, expected 1, have 0}}
+   __arm_mte_set_tag();
+}
+
+void set_tag2(int ptr) {
+   // expected-error@+1 {{first argument of MTE builtin function must be a pointer ('int' invalid)}}
+   __arm_mte_set_tag(ptr);
+}
+
+ptrdiff_t subtract_pointers1(int a, int *b) {
+  // expected-error@+1 {{first argument of MTE builtin function must be a null or a pointer ('int' invalid)}}
+  return __arm_mte_ptrdiff(a, b);
+}
+
+ptrdiff_t subtract_pointers2(int *a, int b) {
+  // expected-error@+1 {{second argument of MTE builtin function must be a null or a pointer ('int' invalid)}}
+  return __arm_mte_ptrdiff(a, b);
+}
+
+ptrdiff_t subtract_pointers3(char *a, int *b) {
+  // expected-error@+1 {{'char *' and 'int *' are not pointers to compatible types}}
+  return __arm_mte_ptrdiff(a, b);
+}
+
+ptrdiff_t subtract_pointers4(int *a, char *b) {
+  // expected-error@+1 {{'int *' and 'char *' are not pointers to compatible types}}
+  return __arm_mte_ptrdiff(a, b);
+}
+
+#ifdef __cplusplus
+ptrdiff_t subtract_pointers5() {
+  // expected-error@+1 {{at least one argument of MTE builtin function must be a pointer ('nullptr_t', 'nullptr_t' invalid)}}
+  return __arm_mte_ptrdiff(nullptr, nullptr);
+}
+#endif