Tests of AAPCS64 updates for alignment attribute

    gcc/testsuite/

        * gcc.target/aarch64/aapcs64/aapcs64.exp: Also execute rec_*.c
        * gcc.target/aarch64/aapcs64/rec_align-5.c: New.
        * gcc.target/aarch64/aapcs64/rec_align-6.c: New.
        * gcc.target/aarch64/aapcs64/rec_align-7.c: New.
        * gcc.target/aarch64/aapcs64/rec_align-8.c: New.
        * gcc.target/aarch64/aapcs64/rec_align-9.c: New.
        * gcc.target/aarch64/aapcs64/test_align-5.c: New.
        * gcc.target/aarch64/aapcs64/test_align-6.c: New.
        * gcc.target/aarch64/aapcs64/test_align-7.c: New.
        * gcc.target/aarch64/aapcs64/test_align-8.c: New.
        * gcc.target/aarch64/aapcs64/test_align-9.c: New.
        * gcc.target/aarch64/aapcs64/rec_vaarg-1.c: New.
        * gcc.target/aarch64/aapcs64/rec_vaarg-2.c: New.

        Backported from trunk:
        84ee090575f413f92377812d277b705d023a4b0b

Change-Id: Idf931ee8b3b5f556b7341734eb940f9a0926a03f

13 files changed, 479 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/aapcs64.exp b/gcc/testsuite/gcc.target/aarch64/aapcs64/aapcs64.exp
index ad92994fe6c..9998d0bda23 100644
--- a/gcc/testsuite/gcc.target/aarch64/aapcs64/aapcs64.exp
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/aapcs64.exp
@@ -38,6 +38,16 @@ foreach src [lsort [glob -nocomplain $srcdir/$subdir/test_*.c]] {
     }
 }
 
+# Test parameter receiving.
+set additional_flags_for_rec $additional_flags
+append additional_flags_for_rec " -fno-inline"
+foreach src [lsort [glob -nocomplain $srcdir/$subdir/rec_*.c]] {
+    if {[runtest_file_p $runtests $src]} {
+	    c-torture-execute [list $src] \
+				    $additional_flags_for_rec
+    }
+}
+
 # Test unnamed argument retrieval via the va_arg macro.
 foreach src [lsort [glob -nocomplain $srcdir/$subdir/va_arg-*.c]] {
     if {[runtest_file_p $runtests $src]} {
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-5.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-5.c
new file mode 100644
index 00000000000..1b42c92ae59
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-5.c
@@ -0,0 +1,44 @@
+/* Test AAPCS layout (alignment) for callee.  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+extern void abort (void);
+
+typedef __attribute__ ((__aligned__ (8))) int alignedint;
+
+alignedint a = 11;
+alignedint b = 13;
+alignedint c = 17;
+alignedint d = 19;
+alignedint e = 23;
+alignedint f = 29;
+alignedint g = 31;
+alignedint h = 37;
+alignedint i = 41;
+alignedint j = 43;
+
+void
+test_passing_many_alignedint (alignedint x0, alignedint x1, alignedint x2,
+			      alignedint x3, alignedint x4, alignedint x5,
+			      alignedint x6, alignedint x7, alignedint stack,
+			      alignedint stack8)
+{
+  if (x0 != a
+      || x1 != b
+      || x2 != c
+      || x3 != d
+      || x4 != e
+      || x5 != f
+      || x6 != g
+      || x7 != h
+      || stack != i
+      || stack8 !=j)
+    abort ();
+}
+
+int
+main (int argc, char **argv)
+{
+  test_passing_many_alignedint (a, b, c, d, e, f, g, h, i, j);
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-6.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-6.c
new file mode 100644
index 00000000000..a8d8b1bd1cb
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-6.c
@@ -0,0 +1,45 @@
+/* Test AAPCS layout (alignment) for callee.  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+extern int memcmp (const void *s1, const void *s2, __SIZE_TYPE__ n);
+extern void abort (void);
+
+/* The underlying struct here has alignment 8.  */
+typedef struct __attribute__ ((__aligned__ (16)))
+  {
+    long x;
+    long y;
+  } overaligned;
+
+overaligned a = { 2, 3 };
+overaligned b = { 5, 8 };
+overaligned c = { 13, 21 };
+
+void
+test_passing_overaligned_struct (int x0, overaligned x1, int x3, int x4,
+				 overaligned x5, int x7, int stack,
+				 overaligned stack8)
+{
+  if (x0 != 7 || x3 != 9 || x4 != 11 || x7 != 15 || stack != 10)
+    abort ();
+  if (memcmp ((void *) &x1, (void *)&a, sizeof (overaligned)))
+    abort ();
+  if (memcmp ((void *) &x5, (void *)&b, sizeof (overaligned)))
+    abort ();
+  if (memcmp ((void *)&stack8, (void *)&c, sizeof (overaligned)))
+    abort ();
+  long addr = ((long) &stack8) & 15;
+  if (addr != 0)
+    {
+      __builtin_printf ("Alignment was %d\n", addr);
+      abort ();
+    }
+}
+
+int
+main (int argc, char **argv)
+{
+  test_passing_overaligned_struct (7, a, 9, 11, b, 15, 10, c);
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-7.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-7.c
new file mode 100644
index 00000000000..61e3c118183
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-7.c
@@ -0,0 +1,47 @@
+/* Test AAPCS layout (alignment) for callee.  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+extern int memcmp (const void *s1, const void *s2, __SIZE_TYPE__ n);
+extern void abort (void);
+
+struct s
+  {
+    long x;
+    long y;
+  };
+
+/* This still has size 16, so is still passed by value.  */
+typedef __attribute__ ((__aligned__ (32))) struct s overaligned;
+
+/* A few structs, at 32-byte-aligned memory locations.  */
+overaligned a = { 2, 3 };
+overaligned b = { 5, 8 };
+overaligned c = { 13, 21 };
+
+void
+test_pass_by_value (int x0, overaligned x1, int x3, int x4, overaligned x5,
+		    int x7, int stack, overaligned stack8)
+{
+  if (x0 != 7 || x3 != 9 || x4 != 11 || x7 != 15 || stack != 10)
+    abort ();
+  if (memcmp ((void *) &x1, (void *)&a, sizeof (overaligned)))
+    abort ();
+  if (memcmp ((void *) &x5, (void *)&b, sizeof (overaligned)))
+    abort ();
+  if (memcmp ((void *)&stack8, (void *)&c, sizeof (overaligned)))
+    abort ();
+  long addr = ((long) &stack8) & 15;
+  if (addr != 0)
+    {
+      __builtin_printf ("Alignment was %d\n", addr);
+      abort ();
+    }
+}
+
+int
+main (int argc, char **argv)
+{
+  test_pass_by_value (7, a, 9, 11, b, 15, 10, c);
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-8.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-8.c
new file mode 100644
index 00000000000..c9351802191
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-8.c
@@ -0,0 +1,37 @@
+/* Test AAPCS layout (alignment) for callee.  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+extern int memcmp (const void *s1, const void *s2, __SIZE_TYPE__ n);
+extern void abort (void);
+
+/* The alignment also gives this size 32, so will be passed by reference.  */
+typedef struct __attribute__ ((__aligned__ (32)))
+  {
+    long x;
+    long y;
+  } overaligned;
+
+overaligned a = { 2, 3 };
+
+void
+test_pass_by_ref (int x0, overaligned x1, int x2)
+{
+  if (x0 != 7 || x2 != 9)
+    abort ();
+  if (memcmp ((void *) &x1, (void *)&a, sizeof (overaligned)))
+    abort ();
+  long addr = ((long) &x1) & 31;
+  if (addr != 0)
+    {
+      __builtin_printf ("Alignment was %d\n", addr);
+      abort ();
+    }
+}
+
+int
+main (int argc, char **argv)
+{
+  test_pass_by_ref (7, a, 9);
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-9.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-9.c
new file mode 100644
index 00000000000..81139f58269
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align-9.c
@@ -0,0 +1,41 @@
+/* Test AAPCS layout (alignment) for callee.  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+extern int memcmp (const void *s1, const void *s2, __SIZE_TYPE__ n);
+extern void abort (void);
+
+struct s
+  {
+    /* This forces the alignment and size of the struct to 16.  */
+    __attribute__ ((__aligned__ (16))) long x;
+    int y;
+    /* 4 bytes padding.  */
+  };
+
+typedef struct s __attribute__ ((__aligned__ (8))) underaligned;
+
+underaligned a = { 1, 4 };
+underaligned b = { 9, 16 };
+underaligned c = { 25, 36 };
+
+void
+test_underaligned_struct (int x0, underaligned x2, int x4, underaligned x6,
+			  int stack, underaligned stack16)
+{
+  if (x0 != 3 || x4 != 5 || stack != 7)
+    abort ();
+  if (memcmp ((void *) &x2, (void *)&a, sizeof (underaligned)))
+    abort ();
+  if (memcmp ((void *)&x6, (void *)&b, sizeof (underaligned)))
+    abort ();
+  if (memcmp ((void *)&stack16, (void *)&c, sizeof (underaligned)))
+    abort ();
+}
+
+int
+main (int argc, char **argv)
+{
+  test_underaligned_struct (3, a, 5, b, 7, c);
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align_vaarg-1.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align_vaarg-1.c
new file mode 100644
index 00000000000..109ddc214e5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align_vaarg-1.c
@@ -0,0 +1,38 @@
+/* Test AAPCS layout (alignment of varargs) for callee.  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+#include <stdarg.h>
+
+extern void abort (void);
+
+typedef __attribute__ ((__aligned__ (16))) long alignedlong;
+
+void
+test_pass_overaligned_long_vaargs (long l, ...)
+{
+  va_list va;
+  va_start (va, l);
+  /* Arguments should be passed in the same registers as if they were ints.  */
+  while (l-- > 0)
+    if (va_arg (va, long) != l)
+      abort ();
+  va_end (va);
+}
+
+int
+main (int argc, char **argv)
+{
+  alignedlong a = 9;
+  alignedlong b = 8;
+  alignedlong c = 7;
+  alignedlong d = 6;
+  alignedlong e = 5;
+  alignedlong f = 4;
+  alignedlong g = 3;
+  alignedlong h = 2;
+  alignedlong i = 1;
+  alignedlong j = 0;
+  test_pass_overaligned_long_vaargs (a, b, c, d, e, f, g, h, i, j);
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align_vaarg-2.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align_vaarg-2.c
new file mode 100644
index 00000000000..dc4eb2fb382
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/rec_align_vaarg-2.c
@@ -0,0 +1,28 @@
+/* Test AAPCS layout (alignment of varargs) for callee.  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+#include <stdarg.h>
+
+extern void abort (void);
+
+typedef __attribute__ ((__aligned__ (16))) int alignedint;
+
+void
+test_pass_overaligned_int_vaargs (int i, ...)
+{
+  va_list va;
+  va_start (va, i);
+  /* alignedint should be pulled out of regs/stack just like an int.  */
+  while (i-- > 0)
+    if (va_arg (va, alignedint) != i)
+      abort ();
+  va_end (va);
+}
+
+int
+main (int argc, char **argv)
+{
+  test_pass_overaligned_int_vaargs (9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
+  return 0;
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-5.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-5.c
new file mode 100644
index 00000000000..ac5673ee5c9
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-5.c
@@ -0,0 +1,35 @@
+/* Test AAPCS layout (alignment).  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+#ifndef IN_FRAMEWORK
+#define TESTFILE "test_align-5.c"
+
+typedef __attribute__ ((__aligned__ (16))) long alignedint;
+
+alignedint a = 11;
+alignedint b = 13;
+alignedint c = 17;
+alignedint d = 19;
+alignedint e = 23;
+alignedint f = 29;
+alignedint g = 31;
+alignedint h = 37;
+alignedint i = 41;
+alignedint j = 43;
+
+#include "abitest.h"
+#else
+  ARG (alignedint, a, X0)
+  /* Attribute suggests R2, but we should use only natural alignment:  */
+  ARG (alignedint, b, X1)
+  ARG (alignedint, c, X2)
+  ARG (alignedint, d, X3)
+  ARG (alignedint, e, X4)
+  ARG (alignedint, f, X5)
+  ARG (alignedint, g, X6)
+  ARG (alignedint, h, X7)
+  ARG (alignedint, i, STACK)
+  /* Attribute would suggest STACK + 16 but should be ignored:  */
+  LAST_ARG (alignedint, j, STACK + 8)
+#endif
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-6.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-6.c
new file mode 100644
index 00000000000..20cbd941939
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-6.c
@@ -0,0 +1,36 @@
+/* Test AAPCS layout (alignment).  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+#ifndef IN_FRAMEWORK
+#define TESTFILE "test_align-6.c"
+
+/* The underlying struct here has alignment 8.  */
+typedef struct __attribute__ ((__aligned__ (16)))
+  {
+    long x;
+    long y;
+  } overaligned;
+
+/* A couple of instances, at 16-byte-aligned memory locations.  */
+overaligned a = { 2, 3 };
+overaligned b = { 5, 8 };
+overaligned c = { 13, 21 };
+
+#include "abitest.h"
+#else
+  ARG (int, 7, W0)
+  /* Natural alignment should be 8.  */
+  ARG (overaligned, a, X1)
+  ARG (int, 9, W3)
+  ARG (int, 11, W4)
+  ARG (overaligned, b, X5)
+  ARG (int, 15, W7)
+#ifndef __AAPCS64_BIG_ENDIAN__
+  ARG (int, 10, STACK)
+#else
+  ARG (int, 10, STACK + 4)
+#endif
+  /* Natural alignment should be 8.  */
+  LAST_ARG (overaligned, c, STACK + 8)
+#endif
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-7.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-7.c
new file mode 100644
index 00000000000..6af422f27e5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-7.c
@@ -0,0 +1,38 @@
+/* Test AAPCS layout (alignment).  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+#ifndef IN_FRAMEWORK
+#define TESTFILE "test_align-7.c"
+
+struct s
+  {
+    long x;
+    long y;
+  };
+
+/* This still has size 16, so is still passed by value.  */
+typedef __attribute__ ((__aligned__ (32))) struct s overaligned;
+
+/* A few structs, at 32-byte-aligned memory locations.  */
+overaligned a = { 2, 3 };
+overaligned b = { 5, 8 };
+overaligned c = { 13, 21 };
+
+#include "abitest.h"
+#else
+  ARG (int, 7, W0)
+  /* Alignment should be 8.  */
+  ARG (overaligned, a, X1)
+  ARG (int, 9, W3)
+  ARG (int, 11, W4)
+  ARG (overaligned, b, X5)
+  ARG (int, 15, W7)
+#ifndef __AAPCS64_BIG_ENDIAN__
+  ARG (int, 10, STACK)
+#else
+  ARG (int, 10, STACK + 4)
+#endif
+  /* Natural alignment should be 8.  */
+  LAST_ARG (overaligned, c, STACK + 8)
+#endif
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-8.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-8.c
new file mode 100644
index 00000000000..ad4dfe4b62c
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-8.c
@@ -0,0 +1,33 @@
+/* Test AAPCS layout (alignment).  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+#ifndef IN_FRAMEWORK
+#define TESTFILE "test_align-8.c"
+
+/* The alignment also gives this size 32, so will be passed by reference.  */
+typedef struct __attribute__ ((__aligned__ (32)))
+  {
+    long x;
+    long y;
+  } overaligned;
+
+#define EXPECTED_STRUCT_SIZE 32
+extern void link_failure (void);
+int
+foo ()
+{
+  /* Optimization gets rid of this before linking.  */
+  if (sizeof (overaligned) != EXPECTED_STRUCT_SIZE)
+    link_failure ();
+}
+
+overaligned a = { 2, 3 };
+
+#include "abitest.h"
+#else
+  ARG (int, 7, W0)
+  /* Alignment should be 8.  */
+  PTR (overaligned, a, X1)
+  LAST_ARG (int, 9, W2)
+#endif
diff --git a/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-9.c b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-9.c
new file mode 100644
index 00000000000..0f5fa352a91
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/aapcs64/test_align-9.c
@@ -0,0 +1,47 @@
+/* Test AAPCS layout (alignment).  */
+
+/* { dg-do run { target aarch64*-*-* } } */
+
+#ifndef IN_FRAMEWORK
+#define TESTFILE "test_align-9.c"
+
+struct s
+  {
+    /* This forces the alignment and size of the struct to 16.  */
+    __attribute__ ((__aligned__ (16))) long x;
+    int y;
+    /* 4 bytes padding.  */
+  };
+
+typedef struct s __attribute__ ((__aligned__ (8))) underaligned;
+
+#define EXPECTED_STRUCT_SIZE 16
+extern void link_failure (void);
+int
+foo ()
+{
+  /* Optimization gets rid of this before linking.  */
+  if (sizeof (struct s) != EXPECTED_STRUCT_SIZE)
+    link_failure ();
+}
+
+underaligned a = { 1, 4 };
+underaligned b = { 9, 16 };
+underaligned c = { 25, 36 };
+
+#include "abitest.h"
+#else
+  ARG (int, 3, W0)
+  /* Object alignment is 16, so skip X1.  */
+  ARG (underaligned, a, X2)
+  ARG (int, 5, W4)
+  /* Object alignment is 16, so skip X5.  */
+  ARG (underaligned, b, X6)
+#ifndef __AAPCS64_BIG_ENDIAN__
+  ARG (int, 7, STACK)
+#else
+  ARG (int, 7, STACK + 4)
+#endif
+  /* Natural alignment should be 16.  */
+  LAST_ARG (underaligned, c, STACK + 16)
+#endif