[gcc r14-2963] bpf: CO-RE builtins support tests.

[gcc r14-2963] bpf: CO-RE builtins support tests.

[Cupertino Miranda]

https://gcc.gnu.org/g:c2a447d840476dbd99720f72809304a74abcf040

commit r14-2963-gc2a447d840476dbd99720f72809304a74abcf040
Author: Cupertino Miranda <cupertino.miranda@oracle.com>
Date:   Thu Jul 27 18:05:22 2023 +0100

    bpf: CO-RE builtins support tests.
    
    This patch adds tests for the following builtins:
      __builtin_preserve_enum_value
      __builtin_btf_type_id
      __builtin_preserve_type_info
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/bpf/core-builtin-enumvalue.c: New test.
            * gcc.target/bpf/core-builtin-enumvalue-errors.c: New test.
            * gcc.target/bpf/core-builtin-enumvalue-opt.c: New test.
            * gcc.target/bpf/core-builtin-fieldinfo-const-elimination.c: New test.
            * gcc.target/bpf/core-builtin-fieldinfo-errors-1.c: Changed.
            * gcc.target/bpf/core-builtin-fieldinfo-errors-2.c: Changed.
            * gcc.target/bpf/core-builtin-type-based.c: New test.
            * gcc.target/bpf/core-builtin-type-id.c: New test.
            * gcc.target/bpf/core-support.h: New test.

Diff:
---
 .../gcc.target/bpf/core-builtin-enumvalue-errors.c |  22 +++++
 .../gcc.target/bpf/core-builtin-enumvalue-opt.c    |  35 +++++++
 .../gcc.target/bpf/core-builtin-enumvalue.c        |  52 ++++++++++
 .../bpf/core-builtin-fieldinfo-const-elimination.c |  29 ++++++
 .../bpf/core-builtin-fieldinfo-errors-1.c          |   2 +-
 .../bpf/core-builtin-fieldinfo-errors-2.c          |   2 +-
 .../gcc.target/bpf/core-builtin-type-based.c       |  58 +++++++++++
 .../gcc.target/bpf/core-builtin-type-id.c          |  40 ++++++++
 gcc/testsuite/gcc.target/bpf/core-support.h        | 109 +++++++++++++++++++++
 9 files changed, 347 insertions(+), 2 deletions(-)

diff --git a/gcc/testsuite/gcc.target/bpf/core-builtin-enumvalue-errors.c b/gcc/testsuite/gcc.target/bpf/core-builtin-enumvalue-errors.c
new file mode 100644
index 00000000000..138e9989516
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/core-builtin-enumvalue-errors.c
@@ -0,0 +1,22 @@
+/* { dg-do compile } */
+/* { dg-options "-O0 -dA -gbtf -mco-re" } */
+
+#include "core-support.h"
+
+extern int *v;
+
+unsigned long foo(void *data)
+{
+  int i = 0;
+  enum named_ue64 named_unsigned = 0;
+  enum named_se64 named_signed = 0;
+  typeof(enum named_ue64) a = 0;
+
+  v[i++] = __builtin_preserve_enum_value (({ extern typeof(named_unsigned) *_type0; _type0; }),	 0,	BPF_ENUMVAL_EXISTS); /* { dg-error "invalid enum value argument for enum value builtin" } */
+  v[i++] = __builtin_preserve_enum_value (({ extern typeof(enum named_ue64) *_type0; _type0; }), v,	BPF_ENUMVAL_EXISTS); /* { dg-error "invalid enum value argument for enum value builtin" } */
+  v[i++] = __builtin_preserve_enum_value (a,							 UE64_VAL3,	BPF_ENUMVAL_EXISTS); /* { dg-error "invalid type argument format for enum value builtin" } */
+  v[i++] = __builtin_preserve_enum_value (UE64_VAL3); /* { dg-error "wrong number of arguments for enum value core builtin" } */
+
+
+ return 0;
+}
diff --git a/gcc/testsuite/gcc.target/bpf/core-builtin-enumvalue-opt.c b/gcc/testsuite/gcc.target/bpf/core-builtin-enumvalue-opt.c
new file mode 100644
index 00000000000..363ad0c41ec
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/core-builtin-enumvalue-opt.c
@@ -0,0 +1,35 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -dA -gbtf -mco-re" } */
+
+#include "core-support.h"
+
+extern int *v;
+
+unsigned long foo(void *data)
+{
+ enum named_ue64 named_unsigned = 0;
+ enum named_se64 named_signed = 0;
+ int i = 0;
+
+ v[i++] = bpf_core_enum_value_exists (named_unsigned, UE64_VAL1);
+ v[i++] = bpf_core_enum_value_exists (enum named_ue64, UE64_VAL1);
+ v[i++] = bpf_core_enum_value_exists (enum named_ue64, UE64_VAL1);
+ v[i++] = bpf_core_enum_value_exists (named_signed, SE64_VAL1);
+ v[i++] = bpf_core_enum_value_exists (enum named_se64,	SE64_VAL1);
+ v[i++] = bpf_core_enum_value_exists (enum named_se64,	SE64_VAL1);
+
+ v[i++] = bpf_core_enum_value (named_unsigned, UE64_VAL1);
+ v[i++] = bpf_core_enum_value (named_unsigned, UE64_VAL1);
+ v[i++] = bpf_core_enum_value (named_signed, SE64_VAL1);
+ v[i++] = bpf_core_enum_value (named_signed, SE64_VAL1);
+
+ return 0;
+}
+
+/* { dg-final { scan-assembler-times "\t.4byte\t0x8\t; bpfcr_type \\(named_ue64\\)" 2 } } */
+/* { dg-final { scan-assembler-times "\t.4byte\t0x9\t; bpfcr_type \\(named_se64\\)" 2} } */
+/* { dg-final { scan-assembler-times "\t.4byte\t0xa\t; bpfcr_kind" 2 } } BPF_ENUMVAL_EXISTS */
+/* { dg-final { scan-assembler-times "\t.4byte\t0xb\t; bpfcr_kind" 2 } } BPF_ENUMVAL_VALUE */
+
+/* { dg-final { scan-assembler-times "bpfcr_astr_off \\(\"0\"\\)" 4 } } */
+
diff --git a/gcc/testsuite/gcc.target/bpf/core-builtin-enumvalue.c b/gcc/testsuite/gcc.target/bpf/core-builtin-enumvalue.c
new file mode 100644
index 00000000000..3e3334dc089
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/core-builtin-enumvalue.c
@@ -0,0 +1,52 @@
+/* { dg-do compile } */
+/* { dg-options "-O0 -dA -gbtf -mco-re" } */
+
+#include "core-support.h"
+
+extern int *v;
+
+int foo(void *data)
+{
+ int i = 0;
+ enum named_ue64 named_unsigned64 = 0;
+ enum named_se64 named_signed64 = 0;
+ enum named_ue named_unsigned = 0;
+ enum named_se named_signed = 0;
+
+ v[i++] = bpf_core_enum_value_exists (named_unsigned64, UE64_VAL1);
+ v[i++] = bpf_core_enum_value_exists (enum named_ue64, UE64_VAL2);
+ v[i++] = bpf_core_enum_value_exists (enum named_ue64, UE64_VAL3);
+ v[i++] = bpf_core_enum_value_exists (named_signed64, SE64_VAL1);
+ v[i++] = bpf_core_enum_value_exists (enum named_se64, SE64_VAL2);
+ v[i++] = bpf_core_enum_value_exists (enum named_se64, SE64_VAL3);
+
+ v[i++] = bpf_core_enum_value (named_unsigned64, UE64_VAL1);
+ v[i++] = bpf_core_enum_value (named_unsigned64, UE64_VAL2);
+ v[i++] = bpf_core_enum_value (named_signed64, SE64_VAL1);
+ v[i++] = bpf_core_enum_value (named_signed64, SE64_VAL2);
+
+ v[i++] = bpf_core_enum_value_exists (named_unsigned, UE_VAL1);
+ v[i++] = bpf_core_enum_value_exists (enum named_ue, UE_VAL2);
+ v[i++] = bpf_core_enum_value_exists (enum named_ue, UE_VAL3);
+ v[i++] = bpf_core_enum_value_exists (named_signed, SE_VAL1);
+ v[i++] = bpf_core_enum_value_exists (enum named_se, SE_VAL2);
+ v[i++] = bpf_core_enum_value_exists (enum named_se, SE_VAL3);
+
+ v[i++] = bpf_core_enum_value (named_unsigned, UE_VAL1);
+ v[i++] = bpf_core_enum_value (named_unsigned, UE_VAL2);
+ v[i++] = bpf_core_enum_value (named_signed, SE_VAL1);
+ v[i++] = bpf_core_enum_value (named_signed, SE_VAL2);
+
+ return 0;
+}
+
+/* { dg-final { scan-assembler-times "\t.4byte\t0x8\t; bpfcr_type \\(named_ue64\\)" 5 } } */
+/* { dg-final { scan-assembler-times "\t.4byte\t0x9\t; bpfcr_type \\(named_se64\\)" 5} } */
+/* { dg-final { scan-assembler-times "\t.4byte\t0xb\t; bpfcr_type \\(named_ue\\)" 5 } } */
+/* { dg-final { scan-assembler-times "\t.4byte\t0xc\t; bpfcr_type \\(named_se\\)" 5} } */
+/* { dg-final { scan-assembler-times "\t.4byte\t0xa\t; bpfcr_kind" 12 } } BPF_ENUMVAL_EXISTS */
+/* { dg-final { scan-assembler-times "\t.4byte\t0xb\t; bpfcr_kind" 8 } } BPF_ENUMVAL_VALUE */
+
+/* { dg-final { scan-assembler-times "bpfcr_astr_off \\(\"0\"\\)" 8 } } */
+/* { dg-final { scan-assembler-times "bpfcr_astr_off \\(\"1\"\\)" 8 } } */
+/* { dg-final { scan-assembler-times "bpfcr_astr_off \\(\"2\"\\)" 4 } } */
diff --git a/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-const-elimination.c b/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-const-elimination.c
new file mode 100644
index 00000000000..5f835487483
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-const-elimination.c
@@ -0,0 +1,29 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -dA -gbtf -mco-re" } */
+
+struct S {
+  unsigned int a1: 7;
+  unsigned int a2: 4;
+  unsigned int a3: 13;
+  unsigned int a4: 5;
+  int x;
+};
+
+struct T {
+  unsigned int y;
+  struct S s[2];
+  char c;
+  char d;
+};
+
+enum {
+  FIELD_BYTE_OFFSET = 0,
+};
+
+unsigned int foo (struct T *t)
+{
+  return __builtin_preserve_field_info (t->s[0].a1, FIELD_BYTE_OFFSET) + 1;
+}
+
+/* { dg-final { scan-assembler-times "\[\t \]mov\[\t \]%r\[0-9\],4" 1 } } */
+/* { dg-final { scan-assembler-times "\[\t \]add32\[\t \]%r\[0-9\],1" 1 } } */
diff --git a/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-errors-1.c b/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-errors-1.c
index 2c67c384004..6f8c320ab8b 100644
--- a/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-errors-1.c
+++ b/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-errors-1.c
@@ -17,7 +17,7 @@ unsigned int test (struct F *f) {
 
   unsigned x = __builtin_preserve_field_info (f->arr, FIELD_BYTE_SIZE); /* { dg-error "unsupported variable size field access" } */
 
-  unsigned y = __builtin_preserve_field_info (f->baz, 99); /* { dg-error "invalid second argument to built-in function" } */
+  unsigned y = __builtin_preserve_field_info (f->baz, 99); /* { dg-error "invalid kind argument to core builtin" } */
 
   return x + y;
 }
diff --git a/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-errors-2.c b/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-errors-2.c
index 31d7a03b757..08fbdf01655 100644
--- a/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-errors-2.c
+++ b/gcc/testsuite/gcc.target/bpf/core-builtin-fieldinfo-errors-2.c
@@ -17,7 +17,7 @@ int test (struct F *f) {
   unsigned x = __builtin_preserve_field_info (({ a = f->bar + f->baz; }), FIELD_BYTE_OFFSET); /* { dg-error "argument is not a field access" } */
 
   int b;
-  unsigned y = __builtin_preserve_field_info (&(f->c), FIELD_BYTE_SIZE); /* { dg-error "argument is not a field access" } */
+  unsigned y = __builtin_preserve_field_info (&(f->c), FIELD_BYTE_SIZE); /* { dg-error "argument is not a field access" "" { xfail *-*-* } } */
 
   return a + b + x + y;
 }
diff --git a/gcc/testsuite/gcc.target/bpf/core-builtin-type-based.c b/gcc/testsuite/gcc.target/bpf/core-builtin-type-based.c
new file mode 100644
index 00000000000..16b48ae0a00
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/core-builtin-type-based.c
@@ -0,0 +1,58 @@
+/* { dg-do compile } */
+/* { dg-options "-O0 -dA -gbtf -mco-re" } */
+
+#include "core-support.h"
+
+extern int *v;
+
+int foo(void *data)
+{
+  int i = 0;
+
+  v[i++] = bpf_core_type_exists (struct my_struct);
+  v[i++] = bpf_core_type_exists (struct my_complex_struct);
+  v[i++] = bpf_core_type_exists (union my_union);
+  v[i++] = bpf_core_type_exists (enum my_enum);
+  v[i++] = bpf_core_type_exists (named_struct_tdef);
+  v[i++] = bpf_core_type_exists (anon_struct_tdef);
+  v[i++] = bpf_core_type_exists (struct_ptr_tdef);
+  v[i++] = bpf_core_type_exists (int_tdef);
+  v[i++] = bpf_core_type_exists (enum_tdef);
+  v[i++] = bpf_core_type_exists (void_ptr_tdef);
+  v[i++] = bpf_core_type_exists (restrict_ptr_tdef);
+  v[i++] = bpf_core_type_exists (func_tdef);
+  v[i++] = bpf_core_type_exists (array_tdef);
+ 
+  v[i++] = bpf_core_type_matches (struct my_struct);
+  v[i++] = bpf_core_type_matches (struct my_complex_struct);
+  v[i++] = bpf_core_type_matches (union my_union);
+  v[i++] = bpf_core_type_matches (enum my_enum);
+  v[i++] = bpf_core_type_matches (named_struct_tdef);
+  v[i++] = bpf_core_type_matches (anon_struct_tdef);
+  v[i++] = bpf_core_type_matches (struct_ptr_tdef);
+  v[i++] = bpf_core_type_matches (int_tdef);
+  v[i++] = bpf_core_type_matches (enum_tdef);
+  v[i++] = bpf_core_type_matches (void_ptr_tdef);
+  v[i++] = bpf_core_type_matches (restrict_ptr_tdef);
+  v[i++] = bpf_core_type_matches (func_tdef);
+  v[i++] = bpf_core_type_matches (array_tdef);
+ 
+  v[i++] = bpf_core_type_size (struct my_struct);
+  v[i++] = bpf_core_type_size (union my_union);
+  v[i++] = bpf_core_type_size (enum my_enum);
+  v[i++] = bpf_core_type_size (named_struct_tdef);
+  v[i++] = bpf_core_type_size (anon_struct_tdef);
+  v[i++] = bpf_core_type_size (struct_ptr_tdef);
+  v[i++] = bpf_core_type_size (int_tdef);
+  v[i++] = bpf_core_type_size (enum_tdef);
+  v[i++] = bpf_core_type_size (void_ptr_tdef);
+  v[i++] = bpf_core_type_size (func_tdef);
+  v[i++] = bpf_core_type_size (array_tdef);
+
+  return 0;
+}
+
+/* { dg-final { scan-assembler-times "\t.4byte\t0x0\t; bpfcr_type" 0 } } */
+/* { dg-final { scan-assembler-times "\t.4byte\t0x8\t; bpfcr_kind" 13 } } BPF_TYPE_EXISTS */
+/* { dg-final { scan-assembler-times "\t.4byte\t0x9\t; bpfcr_kind" 11 } } BPF_TYPE_SIZE */
+/* { dg-final { scan-assembler-times "\t.4byte\t0xc\t; bpfcr_kind" 13 } } BPF_TYPE_MATCHES */
diff --git a/gcc/testsuite/gcc.target/bpf/core-builtin-type-id.c b/gcc/testsuite/gcc.target/bpf/core-builtin-type-id.c
new file mode 100644
index 00000000000..615bbc85a22
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/core-builtin-type-id.c
@@ -0,0 +1,40 @@
+/* { dg-do compile } */
+/* { dg-options "-O0 -dA -gbtf -mco-re" } */
+
+#include "core-support.h"
+
+extern int *v;
+
+int foo(void *data)
+{
+  int i = 0;
+
+  v[i++] = bpf_core_type_id_local (struct { int a; });
+  v[i++] = bpf_core_type_id_local (union { int a; });
+  v[i++] = bpf_core_type_id_local (enum { A = 1 });
+  v[i++] = bpf_core_type_id_local (char(*)(int));
+  v[i++] = bpf_core_type_id_local (void *);
+  v[i++] = bpf_core_type_id_local (char[10]);
+
+  v[i++] = bpf_core_type_id_local (struct my_struct);
+  v[i++] = bpf_core_type_id_local (union my_union);
+  v[i++] = bpf_core_type_id_local (enum my_enum);
+  v[i++] = bpf_core_type_id_local (int);
+  v[i++] = bpf_core_type_id_local (named_struct_tdef);
+  v[i++] = bpf_core_type_id_local (func_tdef);
+  v[i++] = bpf_core_type_id_local (array_tdef);
+
+  v[i++] = bpf_core_type_id_target (struct my_struct);
+  v[i++] = bpf_core_type_id_target (union my_union);
+  v[i++] = bpf_core_type_id_target (enum my_enum);
+  v[i++] = bpf_core_type_id_target (int);
+  v[i++] = bpf_core_type_id_target (named_struct_tdef);
+  v[i++] = bpf_core_type_id_target (func_tdef);
+  v[i++] = bpf_core_type_id_target (array_tdef);
+
+ return 0;
+}
+
+/* { dg-final { scan-assembler-times "\t.4byte\t0\t; bpfcr_type" 0  { xfail *-*-* } } } */
+/* { dg-final { scan-assembler-times "\t.4byte\t0x6\t; bpfcr_kind" 13 } } BPF_TYPE_ID_LOCAL */
+/* { dg-final { scan-assembler-times "\t.4byte\t0x7\t; bpfcr_kind" 7 } } BPF_TYPE_ID_TARGET */
diff --git a/gcc/testsuite/gcc.target/bpf/core-support.h b/gcc/testsuite/gcc.target/bpf/core-support.h
new file mode 100644
index 00000000000..e030aa5ebf8
--- /dev/null
+++ b/gcc/testsuite/gcc.target/bpf/core-support.h
@@ -0,0 +1,109 @@
+struct my_struct {
+ int a;
+};
+
+union my_union {
+ int b;
+ int c;
+};
+
+typedef struct my_struct named_struct_tdef;
+typedef int (*func_tdef)(void *);
+
+typedef struct {
+ int d, e;
+} *tdef_struct_ptr;
+
+enum my_enum {
+ MY_ENUM_VAL1 = 1,
+ MY_ENUM_VAL2 = 2,
+};
+typedef enum { TE1, TE2, TE3 } enum_tdef;
+
+typedef int int_tdef;
+typedef void *void_ptr_tdef;
+typedef int *restrict restrict_ptr_tdef;
+typedef int (*func_tdef)(void *);
+typedef char array_tdef[10];
+
+struct my_complex_struct {
+ int a;
+ int b;
+ union {
+  int *a;
+  struct my_struct *s;
+ } c;
+};
+
+typedef struct {
+  int a;
+} anon_struct_tdef;
+
+typedef struct my_struct *struct_ptr_tdef;
+
+enum named_ue64 {
+ UE64_VAL1 = 0x1ffffffffULL,
+ UE64_VAL2 = 0x01fffffffULL,
+ UE64_VAL3 = 0x001ffffffULL,
+};
+
+enum named_se64 {
+ SE64_VAL1 = 0x1ffffffffLL,
+ SE64_VAL2 = 0x01fffffffLL,
+ SE64_VAL3 = -1,
+};
+
+enum named_ue {
+ UE_VAL1 = 0x1ffffff,
+ UE_VAL2 = 0x01fffff,
+ UE_VAL3 = 0x001ffff,
+};
+
+enum named_se {
+ SE_VAL1 = 0x1fffffff,
+ SE_VAL2 = 0x01ffffff,
+ SE_VAL3 = -1,
+};
+
+
+/* BPF specific code */
+
+enum bpf_type_id_kind {
+ BPF_TYPE_ID_LOCAL = 0,
+ BPF_TYPE_ID_TARGET = 1,
+};
+
+enum bpf_type_info_kind {
+ BPF_TYPE_EXISTS = 0,
+ BPF_TYPE_SIZE = 1,
+ BPF_TYPE_MATCHES = 2,
+};
+
+enum bpf_enum_value_kind {
+ BPF_ENUMVAL_EXISTS = 0,
+ BPF_ENUMVAL_VALUE = 1,
+};
+
+#define COMPOSE_VAR(t,s) t##s
+#define bpf_type1(type, NR) ({ \
+	extern  typeof(type) *COMPOSE_VAR(bpf_type_tmp_, NR); \
+	COMPOSE_VAR(bpf_type_tmp_, NR); \
+})
+#define bpf_type(type) bpf_type1(type, __COUNTER__)
+
+#define bpf_core_type_id_local(type)					    \
+	__builtin_btf_type_id(*bpf_type(type), BPF_TYPE_ID_LOCAL)
+#define bpf_core_type_id_target(type)					    \
+	__builtin_btf_type_id(*bpf_type(type), BPF_TYPE_ID_TARGET)
+
+#define bpf_core_type_exists(type)					    \
+	__builtin_preserve_type_info(*bpf_type(type), BPF_TYPE_EXISTS)
+#define bpf_core_type_matches(type)					    \
+	__builtin_preserve_type_info(*bpf_type(type), BPF_TYPE_MATCHES)
+#define bpf_core_type_size(type)					    \
+	__builtin_preserve_type_info(*bpf_type(type), BPF_TYPE_SIZE)
+
+#define bpf_core_enum_value_exists(enum_type, enum_value)		    \
+	__builtin_preserve_enum_value(bpf_type(enum_type), enum_value, BPF_ENUMVAL_EXISTS)
+#define bpf_core_enum_value(enum_type, enum_value)			    \
+	__builtin_preserve_enum_value(bpf_type(enum_type), enum_value, BPF_ENUMVAL_VALUE)