[PATCH][PR target/81535] Fix tests on Power

[Yury Gribov]

Hi all,

This patch fixes issues reported in 
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81535

I removed call to g in pr79439.c because gcc was duplicating the basic 
block with call depending on compiler flags (so scan-assembler-times 
pattern wasn't reliable anymore).  I also added alias to prevent 
inlining introduced by recent PR56727 patch.

I added Power-specific pattern in pr56727-2.c testcase and disabled 
testing on Power in pr56727-1.c.

Tested on powerpc64-unknown-linux-gnu.  Ok for trunk?

-Y
2017-07-28  Yury Gribov  <tetra2...@gmail.com>

        PR target/81535
        * gcc.dg/pr56727-1.c: Do not check output on Power.
        * gcc.dg/pr56727-2.c: Fix pattern for Power.
        * gcc.target/powerpc/pr79439.c: Prevent inlining.

diff -rupN gcc/gcc/testsuite/gcc.dg/pr56727-1.c 
gcc-81535/gcc/testsuite/gcc.dg/pr56727-1.c
--- gcc/gcc/testsuite/gcc.dg/pr56727-1.c        2017-07-28 02:39:54.770046466 
+0000
+++ gcc-81535/gcc/testsuite/gcc.dg/pr56727-1.c  2017-07-28 04:25:04.805648587 
+0000
@@ -1,6 +1,6 @@
 /* { dg-do compile { target fpic } } */
 /* { dg-options "-O2 -fPIC" } */
-/* { dg-final { scan-assembler-not "@(PLT|plt)" { target i?86-*-* x86_64-*-* 
powerpc*-*-* } } } */
+/* { dg-final { scan-assembler-not "@(PLT|plt)" { target i?86-*-* x86_64-*-* } 
} } */
 
 #define define_func(type) \
   void f_ ## type (type b) { f_ ## type (0); } \
diff -rupN gcc/gcc/testsuite/gcc.dg/pr56727-2.c 
gcc-81535/gcc/testsuite/gcc.dg/pr56727-2.c
--- gcc/gcc/testsuite/gcc.dg/pr56727-2.c        2017-07-28 02:39:54.770046466 
+0000
+++ gcc-81535/gcc/testsuite/gcc.dg/pr56727-2.c  2017-07-28 04:21:19.195215187 
+0000
@@ -1,10 +1,10 @@
 /* { dg-do compile { target fpic } } */
 /* { dg-options "-O2 -fPIC" } */
-/* { dg-final { scan-assembler "@(PLT|plt)" { target i?86-*-* x86_64-*-* 
powerpc*-*-linux* } } } */
 
 __attribute__((noinline, noclone))
 void f (short b)
 {
+  __builtin_setjmp (0);  /* Prevent tailcall */
   f (0);
 }
 
@@ -14,3 +14,5 @@ void h ()
 {
   g (0);
 }
+/* { dg-final { scan-assembler "@(PLT|plt)" { target i?86-*-* x86_64-*-* } } } 
*/
+/* { dg-final { scan-assembler "bl f\n\[ \t\]*nop" { target powerpc*-*-linux* 
} } } */
diff -rupN gcc/gcc/testsuite/gcc.target/powerpc/pr79439.c 
gcc-81535/gcc/testsuite/gcc.target/powerpc/pr79439.c
--- gcc/gcc/testsuite/gcc.target/powerpc/pr79439.c      2017-07-28 
02:39:55.750048426 +0000
+++ gcc-81535/gcc/testsuite/gcc.target/powerpc/pr79439.c        2017-07-28 
04:13:47.834177237 +0000
@@ -8,22 +8,17 @@
 
 int f (void);
 
-void
-g (void)
-{
-}
-
 int
 rec (int a)
 {
   int ret = 0;
   if (a > 10 && f ())
     ret += rec (a - 1);
-  g ();
   return a + ret;
 }
 
+void rec_alias (short) __attribute__ ((alias ("rec")));
+
 /* { dg-final { scan-assembler-times {\mbl f\M}   1 } } */
-/* { dg-final { scan-assembler-times {\mbl g\M}   1 } } */
 /* { dg-final { scan-assembler-times {\mbl rec\M} 1 } } */
-/* { dg-final { scan-assembler-times {\mnop\M}    3 } } */
+/* { dg-final { scan-assembler-times {\mnop\M}    2 } } */