[AArch64][testsuite][committed] Fix gcc.target/aarch64/combine_bfxil.c for -mabi=ilp32

As described in https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00963.html this test generates UXTW instructions with -mabi=ilp32
because the foo* functions take pointers and store results into them. In ILP32 the callee clears the top bits with a UXTW.
This trips the scan-assembler-not UXTW test that checks that the zero_extend form of the BFXIL pattern is used, which it is.

This patch avoids this problem by not passing pointers to the results, but instead using global variables for which the foo* functions
will synthesise the address using ADRP, avoiding the UXTW instructions.

With this patch the test PASSes fully with -mabi=ilp32 and still PASSes on LP64.

	* gcc.target/aarch64/combine_bfxil.c: Avoid passing pointers to
	functions.

From-SVN: r264389

2 files changed, 43 insertions, 38 deletions

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index ddf5f73..6794fb6 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2018-09-18  Kyrylo Tkachov  <kyrylo.tkachov@arm.com>
+
+	* gcc.target/aarch64/combine_bfxil.c: Avoid passing pointers to
+	functions.
+
 2018-09-17  Cesar Philippidis  <cesar@codesourcery.com>
 	    Bernd Schmidt <bernds_cb1@t-online.de>
 
diff --git a/gcc/testsuite/gcc.target/aarch64/combine_bfxil.c b/gcc/testsuite/gcc.target/aarch64/combine_bfxil.c
index 98f6159..84e5377 100644
--- a/gcc/testsuite/gcc.target/aarch64/combine_bfxil.c
+++ b/gcc/testsuite/gcc.target/aarch64/combine_bfxil.c
@@ -19,7 +19,7 @@ combine_balanced (unsigned long long a, unsigned long long b)
 unsigned long long
 combine_minimal (unsigned long long a, unsigned long long b)
 {
-  return (a & 0xfffffffffffffffe) | (b & 0x0000000000000001);
+  return (a & 0xfffffffffffffffell) | (b & 0x0000000000000001ll);
 }
 
 unsigned long long
@@ -40,77 +40,77 @@ combine_unbalanced_int (unsigned int a, unsigned int b)
   return (a & 0xffffff00ll) | (b & 0x000000ffll);
 }
 
+unsigned long long c, d;
+
 __attribute__ ((noinline)) void
-foo (unsigned long long a, unsigned long long b, unsigned long long *c,
-  unsigned long long *d)
+foo (unsigned long long a, unsigned long long b)
 {
-  *c = combine_minimal (a, b);
-  *d = combine_minimal (b, a);
+  c = combine_minimal (a, b);
+  d = combine_minimal (b, a);
 }
 
 __attribute__ ((noinline)) void
-foo2 (unsigned long long a, unsigned long long b, unsigned long long *c,
-  unsigned long long *d)
+foo2 (unsigned long long a, unsigned long long b)
 {
-  *c = combine_balanced (a, b);
-  *d = combine_balanced (b, a);
+  c = combine_balanced (a, b);
+  d = combine_balanced (b, a);
 }
 
 __attribute__ ((noinline)) void
-foo3 (unsigned long long a, unsigned long long b, unsigned long long *c,
-  unsigned long long *d)
+foo3 (unsigned long long a, unsigned long long b)
 {
-  *c = combine_unbalanced (a, b);
-  *d = combine_unbalanced (b, a);
+  c = combine_unbalanced (a, b);
+  d = combine_unbalanced (b, a);
 }
 
+unsigned int ic, id;
+
 void
-foo4 (unsigned int a, unsigned int b, unsigned int *c, unsigned int *d)
+foo4 (unsigned int a, unsigned int b)
 {
-  *c = combine_balanced_int (a, b);
-  *d = combine_balanced_int (b, a);
+  ic = combine_balanced_int (a, b);
+  id = combine_balanced_int (b, a);
 }
 
 void
-foo5 (unsigned int a, unsigned int b, unsigned int *c, unsigned int *d)
+foo5 (unsigned int a, unsigned int b)
 {
-  *c = combine_unbalanced_int (a, b);
-  *d = combine_unbalanced_int (b, a);
+  ic = combine_unbalanced_int (a, b);
+  id = combine_unbalanced_int (b, a);
 }
 
 void
-foo6 (unsigned int a, unsigned int b, unsigned long long *c, unsigned long long *d)
+foo6 (unsigned int a, unsigned int b)
 {
-  *c = combine_zero_extended_int(a, b);
-  *d = combine_zero_extended_int(b, a);
+  c = combine_zero_extended_int(a, b);
+  d = combine_zero_extended_int(b, a);
 }
 
 int
 main (void)
 {
-  unsigned long long a = 0x0123456789ABCDEF, b = 0xFEDCBA9876543210, c, d;
-  foo3 (a, b, &c, &d);
+  unsigned long long a = 0x0123456789ABCDEF, b = 0xFEDCBA9876543210;
+  foo3 (a, b);
   if (c != 0x0123456789543210) abort ();
   if (d != 0xfedcba9876abcdef) abort ();
-  foo2 (a, b, &c, &d);
+  foo2 (a, b);
   if (c != 0x0123456776543210) abort ();
   if (d != 0xfedcba9889abcdef) abort ();
-  foo (a, b, &c, &d);
+  foo (a, b);
   if (c != 0x0123456789abcdee) abort ();
   if (d != 0xfedcba9876543211) abort ();
 
-  unsigned int a2 = 0x01234567, b2 = 0xFEDCBA98, c2, d2;
-  foo4 (a2, b2, &c2, &d2);
-  if (c2 != 0x0123ba98) abort ();
-  if (d2 != 0xfedc4567) abort ();
-  foo5 (a2, b2, &c2, &d2);
-  if (c2 != 0x01234598) abort ();
-  if (d2 != 0xfedcba67) abort ();
-
-  unsigned long long c3, d3;
-  foo6 (a2, b2, &c3, &d3);
-  if (c3 != 0x0123ba98) abort ();
-  if (d3 != 0xfedc4567) abort ();
+  unsigned int a2 = 0x01234567, b2 = 0xFEDCBA98;
+  foo4 (a2, b2);
+  if (ic != 0x0123ba98) abort ();
+  if (id != 0xfedc4567) abort ();
+  foo5 (a2, b2);
+  if (ic != 0x01234598) abort ();
+  if (id != 0xfedcba67) abort ();
+
+  foo6 (a2, b2);
+  if (c != 0x0123ba98) abort ();
+  if (d != 0xfedc4567) abort ();
   return 0;
 }